CN202063793U - Biological response system used for multi-stage sewage treatment - Google Patents

Abstract

The utility model is a biological reaction system for multi-stage sewage treatment. The multi-stage sedimentation pretreatment unit, the multi-stage hydrolysis acidification treatment unit, the aeration and oxygenation treatment unit and the multi-stage subsurface flow wetland treatment unit are connected by pipelines. The filter wetland pool and the effluent wetland pool are arranged in sequence, and one side of the multi-stage subsurface flow wetland treatment unit is arranged side by side with a multi-stage sedimentation pretreatment unit, a multi-stage hydrolysis acidification treatment unit and an aeration and oxygenation treatment unit, which are connected by pipelines. The utility model is scientific in design, reasonable in structure, mainly adopts self-flow mode, less electromechanical equipment, low operating cost, low sewage treatment fee, small floor area, obvious sewage treatment effect, can be directly discharged into reservoirs, rivers and lakes, and is easy to operate and maintain. The management is convenient, the project infrastructure and operation costs are low, and purification can be carried out all year round. The bio-ecological technology has strong self-regulation and restoration capabilities, and the sewage treatment meets the national discharge standards.

Description

Biological reaction system for multi-stage sewage treatment

technical field

The utility model relates to a treatment facility for waste water and sewage, in particular to a biological reaction system for multi-stage sewage treatment. the

Background technique

Water pollution will cause the degradation of the ecosystem and the reduction of biodiversity in rivers and lakes. At present, the quality of surface water in many areas of our country is poor, and it is showing a deteriorating trend. The pollution of rivers flowing through large cities is particularly serious. Ecological deterioration At the same time, it seriously affects the landscape of the city. Usually, urban sewage treatment plants treat industrial and urban domestic sewage as the treatment object, and the effluent water quality is the second-level standard. deal with. Since the 1970s, water treatment technology of constructed wetlands has attracted people's attention. It has the advantages of low investment and low energy consumption, and has become a research hotspot in water environment technology. the

At present, there are three main types of technologies used in the world: ①Chemical methods: such as adding chemical agents to kill algae, adding iron salts to promote the precipitation of phosphorus, adding lime to denitrify, etc., but it is easy to cause secondary pollution; ②Physical methods: dredging sediment , Diversion of water to wash away silt, etc., but often treat the symptoms but not the root cause; ③Ecological-biological method: It is a new technology that has developed rapidly abroad in recent years. Nature's own self-purification ability to treat polluted water bodies. the

The existing constructed wetland consists of three key components: plants, microorganisms, and matrix. Fillers with different particle sizes are artificially constructed as the matrix to form the bed body. Water-resistant plants with high-efficiency decontamination are planted on the surface of the bed body, and they are rooted in the matrix bed. , the matrix supports the roots of these plants, and the matrix and plant roots provide a carrier for various microorganisms to attach to, forming a microbial film on the surface of the matrix and plant roots, and the water seeps through the subsurface porous filter bed with plants in the form of subsurface flow. The matrix bed is filled with water, and the purification of the water is completed through the optimal combination of physical, chemical and biological effects in the subsurface wetland. However, there are still many defects and deficiencies. When the dissolved oxygen content in the constructed wetland is low, the aerobic microorganisms in the surface aerobic zone are weakened, the water quality of the effluent is poor, and the concentration of dissolved oxygen in the effluent is low, which is not conducive to receiving Self-purification of water bodies. Most of the matrix fillers are made of gravel packing beds. The variety and composition of matrix fillers are relatively simple. The single composition of matrix fillers forms a relatively uniform permeation system. The operation process of the water body is simple horizontal movement, and the exchange of upper and lower water bodies is poor, resulting in The water flow exchange between the upper aerobic zone and the lower anaerobic zone is weak, resulting in a decline in the purification treatment effect. In order to increase the exchange of upper and lower water bodies and prolong the water flow path in some horizontal flow wetlands, weirs are artificially set up at the bottom of the wetland treatment pool. Although the exchange intensity of the upper and lower water bodies is increased and the water flow path is extended, it is easy to form dead water areas and cause overall purification. Processing efficiency drops. the

Utility model content

The main purpose of this utility model is to solve the problems existing in the above-mentioned sewage treatment, and provide a multi-stage sewage treatment with priority ecological type, green environmental protection type, energy-saving technology, less electromechanical equipment, and biological ecological self-regulation ability and repair ability. biological response system. the

Due to the different treatment processes, the water treatment process has different floor area, treatment characteristics, number of required equipment, treatment cost, mud production, etc., and the appropriate sewage treatment method should be selected according to the characteristics of different regions and local conditions. the

The factors considered in the design of sewage treatment in this utility model are: the scale of water treatment, the quality of influent and effluent water, the change of water quality and water quantity, the size of the occupied area, the difficulty of maintenance and management, and the economy including construction costs and operating costs , the impact on the surrounding environment, the actual application of the project, and the treatment performance, including the treatment effect, treatment stability, impact load resistance, sludge production and sludge stabilization degree, etc. the

The technical scheme that the utility model solves its technical problem adopts is:

It is composed of multi-stage sedimentation pretreatment unit, multi-stage hydrolysis acidification treatment unit, aeration and oxygenation treatment unit and multi-stage subsurface flow wetland treatment unit connected by pipelines. The percolation wetland pool and the effluent wetland pool are arranged in sequence, and one side of the multi-stage subsurface flow wetland treatment unit is arranged side by side with a multi-stage sedimentation pretreatment unit, a multi-stage hydrolysis acidification treatment unit and an aeration and oxygenation treatment unit, which are connected by pipelines , or a multi-stage sedimentation pretreatment unit, a multi-stage hydrolytic acidification treatment unit, an aeration and aeration treatment unit and a multi-stage subsurface flow wetland treatment unit are arranged in sequence and connected by pipelines. the

In engineering design, under the premise of ensuring the effect of water quality treatment, make full use of the existing terrain and landform conditions, design according to local conditions, minimize the land occupation of the project, and reduce the amount of earthwork excavation. During the design process, the concept of circular economy should be followed, and ecological, green, and energy-saving processes should be preferred to minimize the consumption of non-renewable energy. According to different environments, regions and time periods, apply various technologies, make overall arrangements, and scientifically design to obtain the best water environment treatment effect and ensure the safety of water quality. The design of the project is combined with the surrounding environmental landscape and ecological construction to beautify the surrounding environment on the premise of satisfying the improvement of the water environment. the

The layout of the entire project is designed according to the actual situation. It consists of a multi-stage sedimentation pretreatment unit, a multi-stage hydrolysis acidification treatment unit, an aeration and oxygenation treatment unit and a multi-stage subsurface flow wetland treatment unit. The overall layout is rectangular, and the multi-stage sedimentation pretreatment unit The multi-stage hydrolytic acidification treatment unit and the aeration and oxygenation treatment unit are arranged side by side on one side, and the multi-stage subsurface flow wetland treatment unit is arranged on the other side. It is also possible to line up the multi-stage sedimentation pretreatment unit, the multi-stage hydrolytic acidification treatment unit, the aeration and oxygenation treatment unit and the multi-stage subsurface flow wetland treatment unit, and arrange them according to the sewage treatment process. the

Sewage sources include domestic sewage and aquaculture wastewater. The sewage sources are collected by pipelines and then flow into the multi-stage sedimentation pretreatment unit. After entering the sump, it is lifted by the water pump into the aeration and oxygenation treatment unit. After aeration, the effluent flows into the multi-stage subsurface flow wetland treatment unit by itself, and is discharged into the river or All lakes are designed with an open layout, which is convenient for landscape construction. the

The multi-stage sedimentation pretreatment unit is a closed box. The box is divided into at least 3 spaces by partitions. The spaces are respectively sedimentation and decomposition tanks, fermentation sedimentation tanks and storage tanks. A closed slag removal port is set on the top of each space. A sealing cover is installed on the slag cleaning port to form a closed operating space. the

There is a certain amount of suspended solids, floating solids and sediment in the sewage source, which will directly enter the multi-stage hydrolysis acidification treatment unit and the multi-stage subsurface flow wetland treatment unit, which will cause blockage of subsequent processes and affect the normal operation of the entire system. Therefore, before entering the multi-stage hydrolysis acidification treatment unit and the multi-stage subsurface flow wetland treatment unit, the suspended matter, floating matter and sediment entrained in the sewage source should be intercepted, and the suspended matter, floating matter and sediment should be collected, Harmless treatment, water adjustment and sedimentation functions, a pretreatment device that is carried out in the same process. The tops of the sedimentation and decomposition tanks, fermentation sedimentation tanks and storage tanks are provided with slag removal ports, and the slag removal ports are covered with a sealing cover to keep the sedimentation decomposition tanks, fermentation sedimentation tanks and storage tanks in a closed environment. According to the water quality of the sewage source, the multi-stage sedimentation pretreatment unit can be divided into multiple closed spaces according to the design requirements to implement sewage pretreatment. the

The upper part of the pool wall of the sedimentation and decomposition tank on the side of the multi-stage sedimentation pretreatment unit is provided with a sewage inlet. Domestic sewage and aquaculture wastewater. At least one inclined overflow pipe is set in the middle of the partition between the sedimentation and decomposition tank and the fermentation sedimentation tank. The sedimented and decomposed sewage water is subjected to the gravity of the water and flows from the overflow pipe into the fermentation sedimentation tank for fermentation and sedimentation. the

The sedimentation and decomposition tank mainly retains feces containing more eggs. The loose feces float upward due to fermentation and expansion, and the larger ones sink to form floating feces, middle layer of feces and sinking feces. Parasitic The worms belong to a large proportion and naturally settle to the bottom of the pool. The sedimentation decomposition tank is a closed tank in a closed anaerobic environment. Protein organic matter is decomposed through anaerobic fermentation, and ammonia and other substances are produced, which can kill parasite eggs and pathogenic bacteria. the

After the sewage source is precipitated and decomposed in the sedimentation and decomposition tank, the sewage source is separated, and the sewage water body in the middle layer enters the fermentation sedimentation tank through the overflow pipe installed obliquely in the middle of the partition under the action of water gravity. The multi-stage sedimentation pretreatment unit utilizes the self-gravity of the water body and the state after the separation of the sewage source. The overflow pipe installed obliquely on the partition, the water body flows through the overflow pipe, and the suspended matter, floating matter and sediment are blocked. Sediment decomposition tank. the

An inclined overflow pipe is set in the middle of the partition between the fermentation sedimentation tank and the storage tank. The inlet of the overflow pipe of the fermentation sedimentation tank is lower than the outlet of the overflow pipe of the storage tank. The sewage water in the fermentation sedimentation tank is fermented and settled. Under the action of water gravity, the sewage liquid flows from the overflow pipe into the storage tank for separation and sedimentation. the

The fermentation and sedimentation tank further implements fermentation and sedimentation. Compared with the sedimentation and decomposition tank, the number of dung skin and dung, suspended matter and floating matter in the fermentation and sedimentation tank is correspondingly reduced, and the degree of fermentation and decomposition is low. Since there is no new sewage source Entering, the sewage liquid is in a relatively static state, which is conducive to the continued sinking of the eggs floating in the fermentation sedimentation tank, further separating the water body, suspended matter, and floating matter in the sewage liquid, and transporting the further separated clear liquid sewage water body to the accumulation pool. the

The upper part of the tank wall on the other side of the multi-stage sedimentation pretreatment unit is provided with a water outlet, which is connected to the water inlet at the lower part of the multi-stage hydrolysis acidification treatment unit through a pipeline. A gate valve is set on the pipeline to control the output flow and enter The sewage liquid water in the storage tank is fermented and precipitated, and the clear liquid water is fed into the water inlet of the multi-stage hydrolysis and acidification treatment unit through the pipeline from the outlet on the upper part of the tank wall, and the control gate valve is set on the pipeline to control the input into the multi-stage hydrolysis and acidification treatment The flow of the unit, the flow of the sewage source entering the multi-stage sedimentation pretreatment unit flows downstream from the sewage inlet at one end of the multi-stage sedimentation pretreatment unit through the overflow pipe to the outlet at the other end of the multi-stage sedimentation pretreatment unit by using the self-weight of the water body Flow, in the process of flow, carry out sedimentation, fermentation, decomposition, and sterilization to make clear liquid sewage water. the

The storage tank of the multi-stage sedimentation pretreatment unit mainly plays the role of storing sewage liquid. After the treatment of the sedimentation decomposition tank and the fermentation sedimentation tank, the storage tank basically does not contain parasite eggs and pathogenic microorganisms, which meets the requirements of harmless sewage sources. , to make clear liquid sewage water body. The sewage source passes through the fermentation, sedimentation and decomposition of the sedimentation and decomposition tank, the fermentation sedimentation tank and the storage tank, which can better kill insect eggs and bacteria. The water outlet enters the multi-stage hydrolysis acidification treatment unit through the pipeline. the

The water outlet of the multi-stage sedimentation pretreatment unit is connected with the water inlet of the multi-stage hydrolysis acidification treatment unit through pipelines, and the water outlet of the multi-stage sedimentation pretreatment unit and the water inlet of the multi-stage hydrolysis acidification treatment unit realize a drop, forming multiple The water outlet of the one-stage sedimentation pretreatment unit flows to the water inlet of the multi-stage hydrolysis acidification treatment unit by itself. the

The multi-stage hydrolytic acidification treatment unit is in the form of a closed box. The lower part of the pool wall at one end of the multi-stage hydrolysis acidification treatment unit is provided with a water inlet, and the upper part of the pool wall at the other end of the multi-stage hydrolysis acidification treatment unit is provided with a water outlet. A gate valve is provided on the pipeline of the water outlet. Control output flow. The box of the multi-stage hydrolysis acidification treatment unit is divided into at least 3 spaces by partitions, and the spaces are successively the influent hydrolysis oxidation pool, the hydrolysis oxidation pool and the effluent hydrolysis oxidation pool, the inflow hydrolysis oxidation pool, the hydrolysis oxidation pool and the effluent hydrolysis tank. The top of the oxidation tank is provided with a closed inspection port, and a sealing cover is installed on the inspection port, and an L-shaped overcurrent tube is arranged on the separator of the influent hydrolysis oxidation tank, the hydrolysis oxidation tank and the outlet water hydrolysis oxidation tank, and the L-shaped over-current tube The water inlet is higher than the top of the hydrolysis filter layer, and collects the sewage water body that is hydrolyzed and filtered through the hydrolysis filter layer. The outlet of the L-shaped overflow pipe is located in the lower part of the hydrolysis filter layer in another space, and transports the hydrolysis filtered sewage water body To the next hydrolysis filter layer, it is connected to the influent hydrolysis oxidation pool, the hydrolysis oxidation pool and the outlet water hydrolysis oxidation pool. the

A hydrolysis filter layer is installed in the influent hydrolysis oxidation tank, the hydrolysis oxidation tank and the outlet water hydrolysis oxidation tank. The top of the hydrolysis filter layer is lower than the water inlet of the L-shaped overflow pipe and the water outlet on the pool wall. Acidification material, hydrolysis acidification material adopts ceramsite or polyethylene elastic filler with a particle size of 1-2cm. the

The multi-stage hydrolytic acidification treatment unit is an anaerobic bioreactor equipped with a hydrolysis filter layer. There are microbial groups growing in the form of biofilm on the surface of the filter material, and a large number of suspended microorganisms are stored in the gaps between the filter materials. When the sewage water passes through the hydrolysis filter layer, the organic matter is intercepted, adsorbed, metabolized and decomposed, and finally stabilized. At the same time, the influent hydrolysis oxidation tank, the hydrolysis oxidation tank and the effluent hydrolysis oxidation tank are configured in a closed anaerobic environment. In the anaerobic environment, proteinaceous organic matter is decomposed through anaerobic fermentation and produces ammonia and other substances, which can kill parasites. The role of eggs and bacteria. the

The multi-stage hydrolysis and acidification treatment unit is equipped with a water inlet at the lower part of the pool wall, and the clear liquid sewage water body is directly sent to the hydrolysis filter layer of the influent hydrolysis oxidation tank for hydrolysis and filtration, and the multi-stage hydrolysis and acidification treatment unit is installed with a water outlet at the upper part of the pool wall , to collect and transport the hydrolyzed and filtered sewage water to the sump. An inspection port is provided on the top of the influent hydrolysis oxidation pool, the hydrolysis oxidation pool and the outlet water hydrolysis oxidation pool, and the inspection port is covered with a sealing cover to keep the inflow hydrolysis oxidation pool, the hydrolysis oxidation pool and the outlet water hydrolysis oxidation pool in a closed environment. the

An L-shaped overflow pipe is installed on the upper part of the partition between the inlet water hydrolysis oxidation tank, the hydrolysis oxidation tank and the outlet water hydrolysis oxidation tank. The L-shaped overflow pipe collects the sewage water body that has been hydrolyzed and filtered by the hydrolysis filter layer, and transports it to another by gravity. The bottom of the hydrolytic filter layer in the pool is subjected to hydrolytic filtration again. the

The clear liquid water entering the multi-stage hydrolysis acidification treatment unit flows from the water inlet at one end of the multi-stage hydrolysis acidification treatment unit to the water outlet at the other end of the multi-stage hydrolysis acidification treatment unit through the L-shaped flow pipe through the self-weight of the water body. In the process of flowing, hydrolysis, oxidation and fermentation are carried out to make harmless water. the

The domestic sewage in the sewage source contains a high concentration of high-molecular organic matter, and pollutants such as nitrogen and phosphorus mostly exist in the water body in the form of organic nitrogen and organic phosphorus, such as proteins, urea, biological cells, etc., which are not conducive to subsequent multi-purpose The rapid degradation of the subsurface flow wetland treatment unit needs to degrade high molecular weight organic matter into low molecular weight organic matter, organic nitrogen into inorganic nitrogen, and organic phosphorus into inorganic phosphorus through an anaerobic environment, so as to improve the removal of pollutants in subsequent multilevel subsurface flow wetland treatment units. s efficiency. The harmless water after the hydrolysis and filtration of the hydrolysis filter layer overflows the hydrolysis filter layer, gathers in the upper part of the effluent hydrolysis oxidation tank, and flows into the water collection tank from the water outlet. the

The aeration and oxygenation treatment unit is in the shape of a box as a whole. The water inlet is set on the wall of the pool at one end of the aeration and oxygenation treatment unit. The pipeline on the water inlet is equipped with a gate valve to control the flow of the water inlet. The clear water enters the aeration and oxygenation treatment unit from the water inlet through the pipeline. the

An aerator is installed on the upper part of the pool wall at the other end of the aeration and oxygenation treatment unit, and at least one aeration tube is installed along the bottom of the pool of the aeration and aeration treatment unit. The aeration tube is connected to the main pipe, and the aerator and The ends of the main pipe are connected, and a control gate valve is set on the main pipe to control the air intake of the aeration pipe. The content of dissolved oxygen is made into dissolved oxygen water. the

The upper part of one side of the aeration and oxygenation processing unit is provided with a water outlet, and the pipeline on the water outlet is provided with a gate valve to control the flow of the water outlet. The final dissolved oxygen clear liquid water body is transported to the wave-type multi-stage subsurface flow wetland device by gravity. the

The dissolved oxygen content of the harmless water body after hydrolysis and filtration is extremely low, and the aeration and oxygenation treatment unit is to increase the dissolved oxygen content in the harmless water body. The aerator performs aeration through the main pipe and the harmless water body in the phase tank of the aeration pipe, increasing the dissolved oxygen content of the harmless water body to make dissolved oxygen water body, providing oxygen source for the aerobic microorganisms in the subsequent multi-stage subsurface flow wetland unit , the dissolved oxygen water flows from the outlet of the aeration and oxygenation treatment unit to the multi-stage subsurface flow wetland unit. the

The multi-stage subsurface flow wetland treatment unit is box-shaped as a whole, and is divided into at least 4 groups of subsurface flow wetland pools by partitions, which are arranged in turn as an inlet wetland pool, two groups of decomposing and percolating wetland pools, and an outlet wetland pool. A partition is set between the component decomposition and percolation wetland pools. The top of the partition is higher than the upper surface of the decomposition and percolation layer. The lower part of the partition is provided with at least one horizontal flow pipe, and the upper part of the partition is provided with at least one backwash communication port. One, the backwash connection port is higher than the surface layer of the decomposed percolation layer. A partition is set between the effluent wetland pool and another group of decomposition and infiltration wetland pools. The top of the partition is higher than the upper surface layer of the decomposition and infiltration layer. At least one horizontal flow pipe is installed on the lower part of the partition. There is at least one backwash communication port, and the backwash communication port is higher than the surface layer of the decomposed percolation layer. A partition is set between the two-component decomposing and percolating wetland pools, and the partition is installed in the decomposing and percolating layer. The top of the partition is lower than the decomposing and percolating layer, and the decomposing and percolating layer on the upper part of the two-component decomposing and percolating wetland pools is connected. . The upper part of the pool wall at one end of the multi-stage subsurface flow wetland treatment unit is provided with a backwash emptying port, and the backwash emptying port discharges the backwash water source and obstructions from the backwash decomposed percolation layer to the outside of the multi-stage subsurface flow wetland treatment unit. the

The multi-level subsurface flow wetland unit is composed of filler matrix, aquatic plants and microorganisms attached to the filler matrix and plant root zone, forming a unique "substrate-plant-microbe" ecosystem. The multi-stage subsurface flow wetland treatment unit is divided into an inflow wetland pool, a 2-component decomposition and percolation wetland pool, and an outlet wetland pool. Through the installation of partitions and horizontal flow pipes, the dissolved oxygen water body in the multi-stage subsurface flow wetland treatment unit is created. The decomposed infiltration layer flows repeatedly from the surface to the bottom layer, and then from the bottom layer to the surface layer to form a wave-like flow, and implements the reaction process of aerobic, anaerobic, nitrification and denitrification. The upper part of the partition is provided with a backwash connection port, and the upper part of the pool wall at one end of the multi-stage subsurface flow wetland treatment unit is provided with a backwash emptying port. and effluent wetland tank top backwash water source and blockage discharge multi-stage subsurface flow wetland unit. the

At least one backwashing pipeline is installed at the bottom of the pool of the multi-stage subsurface flow wetland treatment unit, and the backwashing pipeline is buried at the bottom of the decomposed percolation layer. At the bottom of the wetland pool, the backwash pipeline is connected to the backwash main pipe, the backwash main pipe leads out of the pool, and the backwash main pipe enters the backwash water source from the outside of the pool to the backwash pipeline. the

After the multi-stage subsurface flow wetland treatment unit has been in operation for a period of time, the decomposed percolation layer is blocked, and the obstructions in the decomposed percolation layer affect the decomposition reaction of the decomposed percolation layer, so it is necessary to backwash the decomposed percolation layer. Inject the backwashing water source from the main backwashing pipe to the backwashing pipeline, flush the decomposed percolation layer, and backwash the obstructions in the decomposed percolation layer to the inlet wetland pool, the 2-component decomposed percolation wetland pool and the outlet wetland pool At the top, the backwash water source and obstructions are discharged from the multistage subsurface flow wetland unit through the backwash communication port and the backwash emptying port on the upper part of the multistage subsurface flow wetland unit. the

Set up at least one detection and observation shaft in the influent wetland pool, effluent wetland pool and the two-component decomposition and percolation wetland pool respectively. The detection and observation shaft runs through the decomposition and percolation layer to the bottom of the pool. Water samples were taken from the observation well. the

When the dissolved oxygen water body is operating in the multi-stage subsurface flow wetland treatment unit, observe the operation of the influent wetland pool, the 2-component decomposition infiltration wetland pool and the effluent wetland pool through the detection and observation shaft, and remove water samples from the detection and observation shaft Check water quality. the

The decomposing infiltration layer is set in the subsurface flow wetland pool. The decomposing and infiltrating layer of the influent wetland pool and the outflowing wetland pool adopts gravel with a particle size of 2-4cm. The decomposed infiltration layer of the percolation wetland pool uses shale with a particle size of 4-8 cm, and the decomposed percolation layer of the other group of decomposed percolation wetland pools uses ceramsite with a particle size of 2-4 cm. the

Plant amphibious species on the upper surface of the decomposed percolation layer. The roots of the plants are rooted in the decomposed percolation layer. The species of plants are reed, yellow iris, cattail, Zaili flower, and black Mitsubishi. At least one species is planted. The filler matrix of the filter layer provides an attachment carrier for microorganisms. The microorganisms form a microbial film on the root system of the plant and the surface of the filler matrix, absorb and remove pollutants in the water body through the plant, and move the pollutant out of the multi-level subsurface flow as the plant is harvested. In the wetland treatment unit, the dissolved oxygen water flows through the inflow wetland pool, the 2-component decomposition and infiltration wetland pool, and the outlet wetland pool to decompose the surface and bottom layers of the percolation layer to make discharge water. the

The decomposition and infiltration layer of the multi-stage subsurface flow wetland treatment unit is set in the inflow wetland pool, the 2-component decomposition and infiltration wetland pool and the effluent wetland pool. The filter layer adopts different filler substrates, plants are planted on the surface of the decomposed percolation layer, and the roots of the plants take root in the surface layer of the decomposed percolation layer to form the plant root zone. The root system of the plant and the filler matrix provide the carrier for the microorganisms to attach to, and the plant root system provides the oxygen source for the microorganisms, forming an aerobic zone in the area of the decomposed infiltration layer near the plant root zone, and forming an aerobic zone in the area of the decomposed infiltration layer far away from the plant root zone. Zones form anaerobic or facultative zones. Compared with the natural wetland, the multi-stage subsurface flow wetland treatment unit of the utility model has water flowing under the surface of the filler matrix, which is not easy to breed mosquitoes and flies. Plants are planted on the surface of the filler matrix, and the water purification ability is strong and the landscape effect is good. the

On the upper part of the pool wall at one end of the multi-stage subsurface flow wetland treatment unit, a water collection pipe is installed along the pool wall, and the water collection pipe is installed in the decomposing seepage layer. A gate valve is set to control the amount of discharged water, and the water collection pipe inputs the collected water body into the storage and discharge tank. the

The upper part of the pool wall at the other end of the multi-stage subsurface flow wetland treatment unit is provided with water distribution pipes along the pool wall. The water distribution pipes are installed in the decomposition and infiltration layer. A gate valve is set at the water inlet to control the water inlet, and evenly distribute the water after the oxygen dissolved in the aeration and oxygenation treatment unit into the decomposition and percolation layer of the inlet wetland pool. the

In the multi-stage subsurface flow wetland treatment unit of the utility model, the structure of the inlet wetland pool, the two-component decomposition and percolation wetland pool and the outlet wetland pool realizes the wave-like flow of the water body, and spreads the decomposition and percolation layer at one end of the water inlet wetland pool from the water distribution pipe In the upper part, the water flows through the influent wetland pool, the 2-component decomposition and infiltration wetland pool and the effluent wetland pool to form a flow from the surface layer to the bottom layer, and from the bottom layer to the surface layer. Finally, the water collection pipe installed at the other end of the multi-stage subsurface flow wetland treatment unit is The upper part of the disintegrated percolation layer collects the treated water body. Compared with natural wetlands, the utility model has greatly improved processing capacity under the same area conditions, can overcome the relatively fragile shortcomings of natural wetlands, and has the advantages of high load rate, small footprint, reliable effect, impact load resistance, etc., and the water flow It flows below the surface of the filler, so it is not easy to breed mosquitoes and flies. Aquatic plants with strong water purification ability and good landscape effect are planted on the surface of the wetland, which can purify the water quality and have a good landscape effect at the same time. the

The maintenance vent pipe is connected with the inlet wetland pool, the 2-component decomposition and percolation wetland pool, and the outlet wetland pool. The flow direction of the dissolved oxygen clear water into the multi-stage subsurface flow wetland treatment unit is from the water distribution pipe into the water inlet wetland pool. The self-weight flows through the 2-component decomposition and infiltration wetland pool into the effluent wetland pool, and is collected by the water collection pipe and input into the discharge storage tank. The dissolved oxygen water body undergoes repeated aerobic, anaerobic, nitrification and denitrification reactions during the flow process The process makes the discharge water body. the

The flow direction of the dissolved oxygen clear liquid water entering the multi-stage submerged flow wetland treatment unit is from the water distribution pipe into the water inlet wetland pool, and uses the self-weight of the water body to flow through the 2-component decomposition and percolation wetland pool into the outlet wetland pool, and is collected by the water collection pipe and input to the discharge In the storage tank, the oxygen-dissolved water body undergoes repeated aerobic, anaerobic, nitrification and denitrification reaction processes in the process of flowing to produce a discharge water body. the

The structure of the utility model to realize the wave-like flow of the water body leads to the flow of the water body from the surface layer to the bottom layer, and from the bottom layer to the surface layer, and the water body repeatedly undergoes the process of aerobic, anaerobic, nitrification and denitrification, so as to realize efficient removal of organic pollutants in the water body and nitrogen and phosphorus. the

A water collection and outlet pool is arranged outside the pool wall at the other end of the multi-stage hydrolysis acidification treatment unit. The water collection and outlet pool is in the shape of a box as a whole. The water outlet of the hydrolysis and acidification treatment unit is connected with the water collection and outlet pool. The water outlet is set on the upper part of the pool wall on the other side of the water collection and outlet pool. A submersible pump is installed at the bottom of the water collection and outlet pool. The hydrolyzed and oxidized clear liquid water body is lifted and transported to the aeration and oxygenation treatment unit. the

In the multi-stage hydrolytic acidification treatment unit, the harmless water after hydrolysis and filtration through the hydrolysis filter layer flows into the sump from the water outlet and accumulates. The submersible pump installed in the sump lifts the harmless water to aeration through the pipeline. Aeration and oxygenation treatment is implemented in the aeration treatment unit to increase the water level of the harmless water body, to realize the drop between the aeration and aeration treatment unit and the multi-level subsurface flow wetland unit, and the water body of the aeration and aeration treatment unit flows to the multi-level subsurface flow wetland by itself within the unit. the

One side of one end of the multi-stage subsurface flow wetland treatment unit is provided with an accumulation and discharge pond, the accumulation and discharge pond is box-shaped as a whole, and the pool wall of the accumulation and discharge pond is connected with the pool wall of the outlet wetland pool of the multi-stage subsurface flow wetland treatment unit, and is connected with the outlet wetland A water inlet is set on the wall of the accumulation and discharge pond adjacent to the pool, and the water inlet of the accumulation and discharge pond is connected with the water collection pipe of the outlet wetland pool. Discharge to rivers or lakes through discharge pipes. the

A storage and discharge pond is arranged on one side of one end of the multi-level subsurface flow wetland treatment unit, and the discharged water treated by the multi-level subsurface flow wetland treatment unit is stored in the storage and discharge pond, and accumulated to an appropriate storage volume to wait for the discharge opportunity, and then discharged to rivers or lakes . the

In the middle of one side of the multi-stage subsurface flow wetland treatment unit, an inspection and maintenance venting control well is set. The bottom of one side of the inlet wetland pool, the 2-component decomposition and infiltration wetland pool and the outlet wetland pool of the subsurface flow wetland treatment unit is provided with a maintenance vent pipe, and the maintenance vent pipe is connected with the water inlet wetland pool, the 2-component decomposition and infiltration wetland pool and the outlet water The wetland pools are interconnected, and the maintenance venting pipe is connected and connected with the venting pipe in the maintenance venting control well. A control gate valve is set on the maintenance venting pipe to form a maintenance venting pipeline, and the inlet wetland pool, 2-component decomposition infiltration wetland pool and effluent wetland pool maintenance multi-stage subsurface flow wetland treatment unit. the

After the multi-level subsurface flow wetland treatment unit has been in operation for a period of time, the multi-level subsurface flow wetland treatment unit needs to be overhauled. An inspection and venting control well is set up, and the bottom of one side of the inlet wetland pool, the 2-component decomposition infiltration wetland pool and the outlet wetland pool of the multi-stage subsurface flow wetland treatment unit is equipped with an inspection and venting pipe, and the inspection and venting pipe is connected to the vent in the inspection and venting control well. The empty pipe discharges the water in the inlet wetland pool, the 2-component decomposition infiltration wetland pool and the outlet wetland pool from the empty pipe, and performs maintenance on the multi-stage subsurface flow wetland treatment unit. the

The sewage source enters the sedimentation and decomposition tank from the sewage inlet of the sedimentation and decomposition tank of the multi-stage sedimentation pretreatment unit through the pipeline. The sewage source contains a certain amount of suspended matter, floating matter and sediment, and the proportion of impurities contained in the sewage source is different. After the sewage source enters the sedimentation and decomposition tank, it forms floating scum, middle sewage water and sinking sediment. The sealing of the sedimentation and decomposition tank forms an anaerobic environment. The proteinaceous organic matter contained in the sewage source is decomposed by anaerobic fermentation and produces Ammonia and other substances can kill parasite eggs and germs, realize sedimentation, decomposition, fermentation, and sterilized sewage treatment. Due to the action of water gravity, the middle-level sewage water in the sedimentation decomposition tank enters from the entrance of the overflow pipe set in the middle of the partition wall. The overflow pipe flows into the fermentation sedimentation tank from the outlet higher than the overflow pipe. the

The sewage source contains suspended matter, floating matter and sediment, and the sewage source includes domestic sewage and aquaculture wastewater. Feces are entrained in domestic sewage and aquaculture wastewater, and directly enter the subsequent sewage treatment unit, which will affect the subsequent sewage treatment unit and affect the normal operation of the subsequent sewage treatment unit. The collection of feces, harmless treatment, water volume regulation and sedimentation are carried out downstream in the multi-stage sedimentation pretreatment unit. the

The sedimentation and decomposition tank mainly intercepts feces containing more insect eggs. The loose feces float up due to fermentation and expansion, and the larger specific gravity sinks to form the upper layer of floating feces skin, the middle layer of feces liquid, and the lower layer of sinking feces. The slag, in which the proportion of parasites is relatively large, also sinks to the bottom of the pool. The sedimentation and decomposition tank creates a closed anaerobic environment, through anaerobic fermentation and decomposition of proteinaceous organic matter, and produces ammonia and other substances, which can kill parasite eggs and germs. the

The sewage water entering the fermentation and sedimentation tank is further fermented and precipitated. Compared with the sedimentation and decomposition tank, the amount of scum and suspended matter in the fermentation and sedimentation tank is relatively reduced. The sewage water is in a relatively static state, and the degree of fermentation and decomposition is low, which is conducive to sewage The scum and suspended solids in the water body continue to ferment, decompose and settle, and the sewage water body is fermented and settled. Due to the action of water gravity, the sewage liquid in the middle layer of the fermentation sedimentation tank enters from the entrance of the overflow pipe set in the middle of the partition wall. The overflow pipe flows into the accumulator from the outlet higher than the overflow pipe. the

The function of the fermentation and sedimentation tank is to further ferment and settle. Compared with the sedimentation and decomposition tank, the amount of feces and dung entering the fermentation and sedimentation tank is relatively reduced, the degree of fermentation and decomposition is low, and no new feces enter. Therefore, the fermentation and sedimentation tank It is in a relatively static state, which is conducive to the worm eggs floating in the septic tank to continue to settle to the bottom of the tank. the

The sewage liquid entering the storage tank is further separated and precipitated, and the supernatant liquid is stored in the middle layer of the sewage liquid in the storage tank, and the remaining scum and suspended matter sink to the bottom of the tank. As the sewage liquid continuously enters the storage tank, the sewage in the storage tank The water level of the sewage liquid is also rising continuously, and the supernatant liquid of the sewage liquid flows from the outlet installed on the upper part of the pool wall to the multi-stage hydrolysis oxidation unit through the pipeline, and enters the multi-stage hydrolysis oxidation unit from the water inlet at the lower part of the pool wall of the multi-stage hydrolysis oxidation unit. In the hydrolysis oxidation unit, the sewage source undergoes multi-stage treatment of the multi-stage sedimentation pretreatment unit to remove scum, suspended matter and sediment, and kills parasite eggs, pathogenic microorganisms and bacteria through fermentation, decomposition, precipitation and storage, achieving harmless According to the design requirements of the system, the sewage source is pretreated by a multi-stage sedimentation pretreatment unit to make a sewage clear liquid, and the sewage clear liquid enters a multi-stage hydrolysis acidification treatment unit. the

The function of the storage tank is mainly to store the sewage clear liquid, and the sewage source after the treatment of the sedimentation and decomposition tank and the fermentation sedimentation tank enters the storage tank, basically removes suspended solids, floating solids and sediment substances, and kills parasite eggs and pathogens Microorganisms are made into sewage clear liquid to meet the requirements of harmlessness. The sewage source is treated by the sedimentation and decomposition tank, the fermentation sedimentation tank and the fermentation, decomposition, sedimentation and storage of the storage tank to remove suspended solids, floating objects and sediments, and to kill insect eggs and bacteria. The middle and upper layers of sewage in the storage tank The supernatant enters the multi-stage hydrolysis oxidation unit. the

The multi-stage hydrolytic acidification treatment unit is divided into at least 3 spaces by partitions, which are divided into water inlet hydrolysis oxidation pool, hydrolysis oxidation pool and outlet water hydrolysis oxidation pool. A hydrolysis filter layer is installed in the hydrolysis oxidation pool and the effluent hydrolysis oxidation pool, and the surface of the hydrolysis filter material of the hydrolysis filter layer is attached with microbial groups growing in the form of a biofilm. the

The concentration of polymeric organic matter in the domestic sewage in the non-water source is relatively high, and pollutants such as nitrogen and phosphorus mostly exist in the water body in the form of organic nitrogen and organic phosphorus, such as proteins, urea, biological cells, etc., in the subsequent multi-level subsurface flow The treatment of wetland units is not conducive to rapid degradation. It is necessary to degrade high-molecular organic matter into low-molecular organic matter, organic nitrogen into inorganic nitrogen, and organic phosphorus into inorganic phosphorus in an anaerobic environment to improve the removal of pollutants in multi-stage subsurface flow wetland units. s efficiency. the

The sewage clear liquid enters the bottom of the hydrolysis filter layer of the influent hydrolysis oxidation tank from the water inlet at the bottom of the multi-stage hydrolysis acidification treatment unit. The water level of the clear liquid continues to rise, and the water level of the sewage clear liquid overflows the hydrolysis filter layer of the influent hydrolysis oxidation tank, rises to the upper part of the influent hydrolysis oxidation tank, and reaches the outlet of the L-shaped overflow pipe installed on the upper part of the partition After the sewage clear liquid is hydrolyzed and oxidized by the hydrolytic filter layer of the influent hydrolytic oxidation tank, it enters the bottom of the hydrolytic filter layer of the hydrolytic oxidation tank from the influent hydrolytic oxidation tank through the L-shaped overflow pipe. the

As the sewage clear liquid continues to flow into the hydrolysis filter layer of the hydrolysis oxidation tank, the water level of the sewage clear liquid in the hydrolysis filter layer continues to rise, and the water level of the sewage clear liquid overflows the hydrolysis filter layer of the hydrolysis oxidation tank and rises to the water level of the hydrolysis oxidation tank The upper part reaches the outlet of the L-shaped overcurrent pipe installed on the upper part of the partition. After the sewage clear liquid is hydrolyzed and oxidized by the hydrolysis filter layer of the hydrolysis oxidation tank again, it enters the effluent hydrolysis oxidation from the hydrolysis oxidation tank through the L-shaped overcurrent pipe. The bottom of the pool's hydrolyzed filter layer. the

As the sewage clear liquid continues to flow into the hydrolysis filter layer of the effluent hydrolysis oxidation tank, the water level of the sewage clear liquid in the hydrolysis filter layer continues to rise, and the water level of the sewage clear liquid overflows the hydrolysis filter layer of the effluent hydrolysis oxidation tank and rises to the effluent hydrolysis The upper part of the oxidation tank reaches the water outlet installed on the upper part of the pool wall of the multi-stage hydrolysis acidification treatment unit. When the water is collected and discharged from the pool, the sewage clear liquid passes through the hydrolysis filter layer of the multi-stage hydrolysis acidification treatment unit. During the process of flowing through the hydrolysis filter layer, the microbial groups attached to the surface of the hydrolysis filter material intercept, absorb and metabolize the organic matter in the sewage clear liquid At the same time, the closed anaerobic environment formed by the multi-stage hydrolysis and acidification treatment unit implements anaerobic fermentation on the proteinaceous organic matter, decomposes the proteinaceous organic matter and produces ammonia and other substances, which plays the role of killing parasite eggs and germs. The degradation of organic matter into low-molecular organic matter, organic nitrogen into inorganic nitrogen, and organic phosphorus into inorganic phosphorus is conducive to the rapid degradation of subsequent multi-stage subsurface flow wetland treatment units and improves the removal efficiency of wetland treatment for pollutants. the

The multi-stage hydrolysis oxidation unit is an anaerobic bioreactor equipped with a hydrolysis filter layer. On the surface of the matrix filter material of the hydrolysis filter layer, a microbial population growing in the form of a biofilm is attached, and a large number of suspended microorganisms are trapped in the gaps between the matrix filter materials. , When the sewage water passes through the hydrolysis filter layer, the organic matter is intercepted, adsorbed and metabolized, and finally stabilized. The multi-stage hydrolysis and oxidation unit is to create a closed anaerobic environment. Protein organic matter is decomposed through anaerobic fermentation, and ammonia and other substances are produced, which can kill parasite eggs and bacteria. the

The sewage clear liquid is hydrolyzed and oxidized by the multi-stage hydrolysis and acidification treatment unit to make harmless water. The harmless water is accumulated in the water collection outlet pool. The pipeline lifts the harmless water body to the aeration and oxygenation treatment unit. the

The harmless water enters the aeration and oxygenation treatment unit from the water inlet of the aeration and oxygenation treatment unit, and the aerator of the aeration and oxygenation treatment unit performs aeration and oxygenation treatment on the harmless water body through the main pipe and the aeration pipe Make dissolved oxygen water body, implement aeration and oxygenation treatment on harmless water body to reduce the dissolved oxygen content in harmless water body, and provide oxygen source for aerobic microorganisms in the multi-stage subsurface flow wetland treatment unit. the

After hydrolysis and oxidation by the multi-stage hydrolysis oxidation unit, the content of dissolved oxygen in the water body is extremely low. The main function of the aeration and oxygenation treatment unit is to quickly increase the content of dissolved oxygen in the sewage water body, which is good for the subsequent multi-stage subsurface flow wetland unit. Aerobic microorganisms provide a source of oxygen. the

With the continuous increase of dissolved oxygen water in the aeration and oxygenation treatment unit, the dissolved oxygen water flows from the outlet through the pipeline into the water distribution pipe of the multi-level subsurface flow wetland treatment unit, and the water distribution pipe evenly spreads the dissolved oxygen water in the multi-level subsurface flow In the decomposed percolation layer of the influent wetland pool of the wetland treatment unit, as the water gravity of the dissolved oxygen water body fills the decomposed percolation layer of the influent wetland pool, the water level in the influent wetland pool continues to rise, and the dissolved oxygen water body from The horizontal flow pipe at the lower part of the partition enters the bottom of one set of decomposition and infiltration wetland pools, and dissolved oxygen water continuously flows into one set of decomposition and infiltration wetland pools and fills the other set of decomposition and infiltration wetland pools. the

The multi-level subsurface wetland unit is composed of matrix filter material, aquatic plants, and microorganisms attached to the plant root zone in the decomposed infiltration layer, creating a unique "matrix filter material-plant-microbe" ecosystem. The structure of the multi-level subsurface wetland unit is a subsurface wetland with wave-like flow. The root system of the plant takes root in the surface layer of the decomposed infiltration layer. oxygen source. The aerobic zone is formed in the decomposed percolation layer near the root zone, and the anaerobic or facultative zone is formed in the decomposed percolation layer far from the root zone, and the dissolved oxygen water flows from the upper surface layer of the decomposed percolation layer to the bottom layer of the decomposed percolation layer , and then flow from the bottom of the decomposed percolation layer to the upper surface of the decomposed percolation layer, continuously reciprocating, the dissolved oxygen water flows in waves in the multi-level subsurface flow wetland unit, and repeatedly undergoes aerobic, anaerobic, nitrification and denitrification reactions process to achieve efficient removal of organic pollutants and nitrogen and phosphorus. the

The dissolved oxygen water body is filled with the decomposed percolation layer of one group of decomposed percolation wetland pools, and the water level in one of the decomposed percolation wetland pools is continuously rising. From the top of the clapboard into another group of decomposition and infiltration wetland pools, the dissolved oxygen water continuously flows into the decomposition and infiltration layer of another group of decomposition and infiltration wetland pools, and the water level in the other group of decomposition and infiltration wetland pools continues to rise. Due to the water gravity of the dissolved oxygen water body, the horizontal flow pipe at the lower part of the partition enters the decomposition and percolation layer of the outlet wetland pool, and the dissolved oxygen water continuously flows into the decomposition and percolation layer of the outlet wetland pool and fills the outlet wetland pool. The water level in the effluent wetland pool continues to rise, and reaches the position of the water collection pipe as the water level of the dissolved oxygen water body rises. the

The dissolved oxygen water enters the multi-stage subsurface flow wetland treatment unit, and flows through the decomposed infiltration layer of the influent wetland pool, the 2-component decomposing and percolating wetland pool and the effluent wetland pool to form a wave-like flow. The decomposed infiltration layer of the wetland pool and the effluent wetland pool constitutes a "matrix-plant-microbe" ecosystem. The root system of the plant takes root in the surface layer of the decomposed infiltration layer, and the filler matrix of the decomposed infiltration layer provides a carrier for microorganisms to attach to. , the root system of plant species provides oxygen source for microorganisms, the aerobic zone is formed in the filler matrix layer close to the root zone, and the anaerobic zone or facultative zone is formed in the filler matrix layer far away from the root zone, and the dissolved oxygen water flows through the decomposition process The surface layer and the bottom layer of the percolation layer go through the reaction process of aerobic, anaerobic, nitrification and denitrification repeatedly, and implement the efficient removal of organic pollutants and nitrogen and phosphorus in the dissolved oxygen water body to make the discharge water body, and the discharge water body is collected into the water collection pipe. The discharge water enters the discharge storage tank from the water collection pipe to accumulate, and then is discharged to rivers or lakes through the discharge pipe. the

Compared with the natural wetland, the utility model greatly improves the sewage treatment capacity under the same area conditions, overcomes the relatively fragile shortcomings of the natural wetland, and has the advantages of high load rate, small floor area, reliable effect, and impact load resistance. It flows below the surface of the decomposed percolation layer, which is not easy to breed mosquitoes and flies. It has a strong ability to purify the planting water and has a good landscape effect. the

When the dissolved oxygen water body is operating in the multi-stage subsurface flow wetland treatment unit, observe whether the operation conditions of the influent wetland pool, the two-component decomposition infiltration wetland pool and the outlet wetland pool meet the design requirements through the detection and observation shaft. Take water samples to test whether the water quality meets the design requirements, adjust the gate valve on the water distribution pipe in time, control the water intake, suppress the water flow velocity in the decomposed percolation layer, and adjust the decomposed percolation layer to be in the best decomposition state. the

When the dissolved oxygen water body is operating in the multi-stage subsurface flow wetland treatment unit, observe whether the operation conditions of the influent wetland pool, the two-component decomposition infiltration wetland pool and the outlet wetland pool meet the design requirements through the detection and observation shaft. Take water samples to test whether the water quality meets the design requirements, adjust the gate valve on the water distribution pipe in time, control the water intake, suppress the water flow velocity in the decomposed percolation layer, and adjust the decomposed percolation layer to be in the best decomposition state. the

When the dissolved oxygen water body is operating in the multi-stage subsurface flow wetland treatment unit, observe the operation of the influent wetland pool, the 2-component decomposition infiltration wetland pool and the effluent wetland pool through the detection and observation shaft, and remove water samples from the detection and observation shaft Check water quality. the

When the multi-stage sedimentation pretreatment unit has been running for a period of time, the bottom of the sedimentation and decomposition tank, fermentation sedimentation tank and storage tank has deposited sediment. According to the design requirements, it is necessary to clean the sedimentation and decomposition tank, fermentation sedimentation tank and storage tank. The gate valve on the pipeline of the sewage inlet stops the inflow of the sewage source, and closes the gate valve on the pipeline of the water outlet to stop the outflow of the sewage source after sewage treatment. Open the sealing cover of the slag removal port on the top of the sedimentation and decomposition tank, fermentation sedimentation tank and storage tank, remove the sediment and silt in the sedimentation and decomposition tank, fermentation sedimentation tank and storage tank, and remove the adhesion on the inner wall of the overflow pipe, sewage inlet and water outlet Dirt, keep it clear. Close the sealing cover of the slag removal port on the top of the sedimentation tank, fermentation sedimentation tank and storage tank, open the gate valve on the pipeline of the sewage inlet and the gate valve on the pipeline of the water outlet, and start the multi-stage sedimentation pretreatment unit to resume operation. the

There is a certain amount of suspended matter, floating matter and sediment in the sewage source. After sedimentation and decomposition, the sewage source is separated. The sewage water body in the middle layer is installed in the middle of the partition by tilting under the action of water gravity. The flow pipe of the overflow pipe is shunted to the next pool, and after several shunts, it flows automatically from the outlet installed at the other end of the multi-stage sedimentation pretreatment unit to the multi-stage hydrolysis and oxidation unit for the next process of sewage treatment. The multi-stage hydrolysis and oxidation unit Suspended matter, floating matter and sediment in the tank are continuously deposited at the bottom of the tank. After a period of operation, the sediment at the bottom of the tank accumulates at the bottom of the tank, which affects the operation of the sewage treatment of the multi-stage sedimentation pretreatment unit. The sedimentation pretreatment unit implements slag removal work. the

After the multi-stage hydrolytic acidification treatment unit has been in operation for a period of time, according to the design requirements, the influent hydrolytic oxidation tank, the hydrolytic oxidation tank, the effluent hydrolytic oxidation tank and the water collection outlet tank shall be inspected and maintained, and the gate valve on the pipeline of the water inlet shall be closed to stop cleaning. The inflow of liquid sewage water body, empty the harmless water body in the multi-stage hydrolysis acidification treatment unit, close the gate valve on the pipeline of the water outlet, turn on the submersible pump to empty the harmless water body in the water collection outlet pool, and turn off the submersible pump. Open the sealing cover on the top inspection port of the inlet hydrolysis oxidation pool, hydrolysis oxidation pool and outlet water hydrolysis oxidation pool, carry out inspection and maintenance on the inlet water hydrolysis oxidation pool, hydrolysis oxidation pool and outlet water hydrolysis oxidation pool, and clean the pools of the water collection and outlet pools The attached dirt on the wall, clean the attached dirt on the inner wall of the L-shaped overflow pipe, the water inlet and the water outlet, keep it unobstructed, overhaul and maintain the submersible pump. After inspection and maintenance, close the sealing caps on the top inspection ports of the inlet hydrolysis oxidation tank, hydrolysis oxidation tank and outlet water hydrolysis oxidation tank, open the gate valve on the pipeline of the water inlet and the gate valve on the pipeline of the water outlet, and start the multi-stage hydrolysis and acidification The processing unit resumes operation. the

The multi-stage hydrolysis acidification treatment unit of the utility model is an anaerobic bioreactor equipped with a hydrolysis filter layer. Pipes, water outlets, pipelines and submersible pumps will all have attached dirt, which will continue to accumulate and thicken, which will affect the operation of the sewage treatment of the multi-stage hydrolytic acidification treatment unit, and the multi-stage hydrolysis acidification treatment unit needs to be overhauled and maintained . the

After the aeration and oxygenation treatment unit has been in operation for a period of time, the aeration and oxygenation treatment unit shall be overhauled and maintained according to the design requirements, the gate valve on the pipeline of the water inlet shall be closed, the inflow of clear liquid and sewage water shall be stopped, and the aeration and aeration treatment shall be emptied For the dissolved oxygen water in the unit, close the gate valve on the pipeline of the water outlet, remove the attached dirt on the pool wall of the aeration and aeration treatment unit, clean the main pipe and aeration pipe, keep it unblocked, and repair and maintain the aerator. Open the gate valve on the pipeline of the water inlet, inject clear liquid and sewage water, open the gate valve on the pipeline of the water outlet, pass through the water distribution pipeline of the multi-stage subsurface flow wetland treatment unit to transport dissolved oxygen water, turn on the aerator, and pass through the main pipe and aeration The trachea aerates and increases oxygen to the clear liquid sewage water body in the aeration and oxygen enhancement treatment unit, and the aeration and oxygen enhancement treatment unit resumes operation. the

The aeration and oxygenation treatment unit of the utility model is to increase the dissolved oxygen content in the harmless water body, and provide an oxygen source for the aerobic microorganisms in the subsequent multi-stage subsurface flow wetland unit. After a period of operation according to the design requirements, there will be attached dirt on the pool wall, water inlet, water outlet, main pipe, aeration pipe and aerator of the aeration and oxygenation treatment unit. With the continuous continuation of the attached dirt, Thickening will directly affect the operation of the aeration and oxygenation treatment unit, and the aeration and oxygenation treatment unit needs to be overhauled and maintained. the

When the multi-stage subsurface flow wetland treatment unit runs for a period of time, the decomposed percolation layer is blocked, and the blockage in the decomposed percolation layer affects the decomposition reaction of the decomposed percolation layer. It is necessary to backwash the decomposed percolation layer and close the water distribution pipe. Gate valve, stop the input of dissolved oxygen water, empty the discharge water in the water collection pipe, and close the gate valve on the water collection pipe. Inject the backwashing water source from the main backwashing pipe to the backwashing pipeline, flush the decomposed percolation layer, and backwash the obstructions in the decomposed percolation layer to the inlet wetland pool, the 2-component decomposed percolation wetland pool and the outlet wetland pool At the top, the backwash water source and obstructions at the top of the effluent wetland pool are discharged from the multi-stage subsurface flow wetland unit through the backwash emptying port on the upper part of the multi-stage subsurface flow wetland unit. Stop injecting the backwash water source into the backwash pipeline, close the backwash vent, open the gate valves on the maintenance vent pipes of the inlet wetland pool, the 2-component decomposition percolation wetland pool and the outlet wetland pool, and vent the air from the vent pipe. Backwash the water body in the water wetland pool, the 2-component decomposing and infiltrating wetland pool and the effluent wetland pool, close the gate valve on the inspection and venting pipe of the influent wetland pool, the 2-component decomposing and infiltrating wetland pool and the effluent wetland pool, and open the gate valve on the water distribution pipe Gate valve, start to input dissolved oxygen water, open the gate valve on the water collection pipe, and the multi-stage subsurface flow wetland treatment unit resumes operation. the

The dissolved oxygen water body with increased dissolved oxygen content from the aeration and oxygenation treatment unit enters the multi-stage subsurface flow wetland treatment unit for aerobic, anaerobic, nitrification and denitrification treatment. After a period of operation according to the design requirements, the infiltration layer is decomposed. The blockage will affect the decomposition reaction of the decomposed percolation layer. It is necessary to backwash the multi-stage subsurface flow wetland treatment unit to clean the decomposed percolation layer. the

After the multi-stage subsurface flow wetland treatment unit has been in operation for a long time, it is necessary to overhaul and maintain the multi-stage subsurface flow wetland treatment unit according to the design requirements, close the gate valve on the water distribution pipe, stop the water intake, empty the discharge water in the water collection pipe, and close the water collection pipe Stop the water outlet, open the gate valves on the maintenance vent pipes of the inlet wetland pool, the 2-component decomposition and infiltration wetland pool and the outlet wetland pool, and empty the inlet wetland pool, the 2-component decomposition and percolation wetland pool and the discharge pipe from the vent pipe The sewage treatment water body of the effluent wetland pool shall be overhauled and maintained for the multi-stage subsurface flow wetland treatment unit. Clean the dirt attached to the inner wall of the backwash connection port of the water distribution pipe and the water collection pipe and the backwash emptying port, and clean and decompose the plants on the upper surface of the percolation layer. After the maintenance is over, close the gate valves on the inspection and venting pipes of the inlet wetland pool, the 2-component decomposing and percolating wetland pool and the outlet wetland pool, open the gate valve on the water distribution pipe, start water intake, open the gate valve of the water collection pipe, start water discharge, and more The first-level subsurface flow wetland treatment unit resumed operation. the

After the multi-stage subsurface flow wetland treatment unit has been in operation for a period of time, it is necessary to overhaul and maintain the multi-stage subsurface flow wetland treatment unit according to the design requirements. Clean the dirt attached to the inner wall of the backwash connection port of the water distribution pipe and the water collection pipe and the backwash emptying port, and clean and decompose the plants on the upper surface of the percolation layer. the

The utility model has a removal rate of 90.9% for suspended solids, 85% for chemical oxygen demand, 90% for biochemical oxygen demand, and 50% for total nitrogen. , The removal rate of ammonia nitrogen can reach 68%, and the removal rate of total phosphorus can reach 87.5%, see the calculation table of pollutant removal. the

Calculation table of the effect of removing pollutants

The utility model is a biological reaction system for multi-stage sewage treatment. The design is scientific, the structure is reasonable, the investment is low, the construction period is short, the effect is quick, and the load rate is high. Discharging into reservoirs, rivers and lakes can overcome the weakness of natural wetlands. It has strong nitrogen and phosphorus removal capacity, impact load resistance, convenient operation, maintenance and management, low engineering infrastructure and operation costs, and can be purified all year round. The permeability coefficient of the filter layer is high, and the resistance to water flow is relatively small. Most sewage treatment units adopt a closed treatment method, and the water flow flows below the surface of the filler. The sanitary conditions are good, and it is not easy to produce odors and breed mosquitoes and flies. The open layout is convenient for landscape construction, and can be closely integrated with urban landscape construction. It can be used as a park green space, and at the same time, it can beautify the environment and improve the landscape of adjacent areas. the

The utility model adopts biological ecological treatment technology to process domestic sewage, has less mechanical and electrical equipment, biological ecological technology has strong self-regulation ability and repair ability, and the service life is at least 50 years. The sewage treatment of the utility model conforms to the national discharge standard. the

Description of drawings

The utility model is described in detail below in conjunction with accompanying drawing and embodiment. the

Figure 1 Schematic diagram of the overall layout of the biological reaction system for multi-stage sewage treatment

Figure 2 Schematic diagram of the overall layout of the biological reaction system for multi-stage sewage treatment

Figure 3 Schematic cross-sectional view of the multi-stage sedimentation pretreatment unit of the biological reaction system for multi-stage sewage treatment

Figure 4 Schematic cross-sectional view of the multi-stage hydrolysis acidification treatment unit of the biological reaction system for multi-stage sewage treatment

Figure 5 Schematic cross-sectional view of the aeration and oxygenation treatment unit of the biological reaction system for multi-stage sewage treatment

Fig. 6 Schematic cross-sectional view of the multi-stage subsurface flow wetland treatment unit of the biological reaction system for multi-stage sewage treatment

1. Multi-stage sedimentation pretreatment unit, 2. Multi-stage hydrolysis acidification treatment unit, 3. Aeration and dissolved oxygen device, 4. Multi-stage subsurface flow wetland treatment unit, 5. Water collection and effluent tank, 6. Sedimentation and decomposition tank, 7. Fermentation sedimentation tank, 8. Storage tank , 9 overcurrent pipe, 10 slag removal port, 11 sewage inlet, 12 water outlet, 13 water inlet, 14 pipeline, 15 inspection port, 16L-shaped overcurrent pipe, 17 hydrolysis acidification filling filter material, 18 aerator, 19 Water distribution pipes, 20 Horizontal flow pipes, 21 Water collection pipes, 22 Vent pipes, 23 Plants, 24 Maintenance vent pipes, 25 Accumulation and discharge tanks, 26 Discharge pipes, 27 Inspection and observation shafts, 28 Maintenance and venting control wells, 29 Hydrolysis filter layer, 30 aeration pipe, 31 submersible pump, 32 backwash emptying port, 33 clapboard, 34 main pipe, 35 water inlet wetland pool, 36 decomposition percolation wetland, 37 water outlet wetland pool, 38 decomposition percolation layer , 39 vent pipe, 39 water inlet hydrolysis oxidation pool, 40 hydrolysis oxidation pool, 41 water outlet hydrolysis oxidation pool, 42 backwash pipeline, 43 backwash connection port. the

Detailed ways

Example 1

It is composed of a multi-stage sedimentation pretreatment unit (1), a multi-stage hydrolysis acidification treatment unit (2), an aeration and oxygenation treatment unit (3) and a multi-stage subsurface flow wetland treatment unit (4) connected by a pipeline (14), The inflow wetland pool (35), the 2-component decomposition and infiltration wetland pool (36) and the outlet wetland pool (37) of the multistage subsurface flow wetland treatment unit (4) are arranged in sequence, and one side of the multistage subsurface flow wetland treatment unit (4) The multi-stage sedimentation pretreatment unit (1), the multi-stage hydrolytic acidification treatment unit (2) and the aeration and oxygenation treatment unit (3) are arranged side by side in sequence, and are connected by pipelines (14), as shown in FIG. 1 . the

Example 2

The multi-stage sedimentation pretreatment unit (1), the multi-stage hydrolytic acidification treatment unit (2), the aeration and aeration treatment unit (3) and the multi-stage subsurface flow wetland treatment unit (4) are arranged in sequence and connected to each other through the pipeline (14). connection, as shown in Figure 2. the

Example 3

The multi-stage sedimentation pretreatment unit (1) is a closed box, and the box is divided into at least 3 spaces by a partition (33), and the spaces are respectively the sedimentation and decomposition tank (6), the fermentation sedimentation tank (7) and the storage tank. (8), an airtight slag removal port (10) is arranged on the top of each space, and a sealing cover is installed on the slag removal port (10), forming a closed operating space. the

The upper part of the pool wall of the sedimentation decomposition tank (6) on one side of the multi-stage sedimentation pretreatment unit (1) is provided with a sewage inlet (11), and the sewage inlet (11) is introduced into a sewage source through a pipeline (14), and the sewage inlet ( 11) A gate valve is set on the pipeline (14) to control the inflow of the sewage source, and the sewage source is domestic sewage and aquaculture wastewater. At least one inclined overflow pipe (9) is arranged in the middle of the partition (33) between the sedimentation and decomposition tank (6) and the fermentation sedimentation tank (7), and the inlet of the overflow pipe (9) of the sedimentation and decomposition tank (6) Lower than the outlet of the overflow pipe (9) of the fermentation sedimentation tank (7), the sewage source in the sedimentation and decomposition tank (6) has been precipitated and decomposed. The sewage water body is subjected to the gravity of the water and flows from the overflow pipe (9) into the fermentation tank. Fermentation and sedimentation in the sedimentation tank (7). the

An inclined overflow pipe (9) is arranged in the middle of the partition (33) between the fermentation sedimentation tank (7) and the accumulation tank (8), and the inlet of the overflow pipe (9) of the fermentation sedimentation tank (7) is lower than the accumulation tank The outlet of the overflow pipe (9) of (8), the sewage water body in the fermentation sedimentation tank (7) is fermented, and the sewage liquid after sedimentation flows into the storage tank (8) from the overflow pipe (9) under the action of water gravity. Internal separation and precipitation. the

A water outlet (12) is provided on the upper part of the tank wall of the reservoir (8) on the other side of the multi-stage sedimentation pretreatment unit (1), and the water outlet (12) is connected to the lower part of the tank wall of the multi-stage hydrolysis acidification treatment unit (2) through the pipeline (14). The water inlets (13) are connected, and gate valves are set on the pipelines (14) to control the output flow. The sewage liquid water entering the storage tank (8) is then fermented and precipitated from the water outlet ( 12) The water inlet (13) of the multi-stage hydrolysis and acidification treatment unit (2) is automatically input through the pipeline (14), and a control gate valve is set on the pipeline (14) to control the flow input into the multi-stage hydrolysis and acidification treatment unit (2). The sewage source of the multi-stage sedimentation pretreatment unit (1) flows from the sewage inlet (11) at one end of the multi-stage sedimentation pretreatment unit (1) to the multi-stage sedimentation pretreatment unit through the overflow pipe (9) by using the self-weight of the water body (1) The water outlet (12) at the other end flows downstream, and during the flow process, sedimentation, fermentation, decomposition, and sterilization are carried out to make clear liquid sewage water, as shown in Figures 1, 2 and 3. the

Example 4

The multi-stage hydrolytic acidification treatment unit (2) is in the form of a closed box, the lower part of the pool wall at one end of the multi-stage hydrolysis acidification treatment unit (2) is provided with a water inlet (13), and the upper part of the pool wall at the other end of the multi-stage hydrolysis acidification treatment unit (2) is The water outlet (12) is set, and a gate valve is set on the pipeline (14) of the water outlet (12) to control the output flow. The casing of the multi-stage hydrolytic acidification treatment unit (2) is divided into at least 3 spaces by a partition (33), and the spaces are sequentially the influent hydrolytic oxidation pool (39), the hydrolytic oxidation pool (40) and the effluent hydrolytic oxidation pool ( 41), the tops of the water inlet hydrolysis oxidation tank (39), the hydrolysis oxidation tank (40) and the water outlet hydrolysis oxidation tank (41) are respectively provided with airtight inspection ports (15), and a sealing cover is installed on the inspection port (15). An L-shaped overcurrent pipe (16) is arranged on the dividing plate (33) of the inlet water hydrolysis oxidation pond (39), the hydrolysis oxidation pond (40) and the outlet water hydrolysis oxidation pond (41), and the inlet of the L-shaped overflow pipe (16) The water outlet is higher than the top of the hydrolysis filter layer (29), collects the sewage water body that is hydrolyzed and filtered through the hydrolysis filter layer (29), and the water outlet of the L-shaped overcurrent pipe (16) is in another space of the hydrolysis filter layer (29) The lower part in the inner part transports the hydrolyzed and filtered sewage water body to the next hydrolyzed filter layer, and communicates with the influent hydrolyzed oxidation pond (39), the hydrolyzed oxidized pond (40) and the effluent hydrolyzed oxidized pond (41). the

The hydrolysis filter layer (29) is set in the water inlet hydrolysis oxidation tank (39), the hydrolysis oxidation tank (40) and the outlet water hydrolysis oxidation tank (41), and the top of the hydrolysis filter layer (29) is lower than the L-shaped overflow pipe ( 16) of the water inlet and the water outlet (12) on the pool wall, the hydrolysis filter layer (29) is filled with hydrolysis acidification material (17), and the hydrolysis acidification material (17) adopts ceramsite or polyethylene with a particle size of 1-2cm Elastic filler. the

The clear liquid water entering the multi-stage hydrolysis acidification treatment unit (2) flows from the water inlet (13) at one end of the multi-stage hydrolysis acidification treatment unit (2) to the multi-stage hydrolysis through the L-shaped overflow pipe (16) by the self-weight of the water body. The water outlet (12) at the other end of the acidification treatment unit (2) flows downstream, and is hydrolyzed, oxidized, and fermented during the flowing process to form a harmless water body. the

A water collection and outlet pool (5) is arranged outside the pool wall at the other end of the multi-stage hydrolysis acidification treatment unit (2). The pool wall at the other end of the unit (2) is connected, the water outlet (13) of the multi-stage hydrolysis acidification treatment unit (2) is connected with the water collection outlet pool (5), and the other side of the water collection outlet pool (5) A water outlet (12) is arranged on the upper part of the pool wall, and a submersible pump (31) is installed at the bottom of the water collection outlet pool (5). The liquid water body is lifted and transported to the aeration and oxygenation treatment unit (3), as shown in Fig. 1, Fig. 2 and Fig. 4 . the

Example 5

The aeration and oxygenation processing unit (3) is box-shaped as a whole, and a water inlet (13) is arranged on the pool wall at one end of the aeration and oxygenation processing unit (3), and a gate valve is arranged on the pipeline (14) on the water inlet (13). The flow rate of the water inlet (13) is controlled, and the hydrolyzed and oxidized clear liquid water in the water collection outlet (5) enters the aeration and oxygenation treatment unit (3) from the water inlet (13) through the pipeline (14). the

An aerator (18) is arranged on the upper part of the pool wall at the other end of the aeration and oxygenation treatment unit (3), and at least one aeration pipe (30) is arranged at the bottom of the pool of the aeration and oxygenation treatment unit (3) along the bottom of the pool. The trachea (30) is connected with the main pipe (34), the aerator (18) is connected with the end of the main pipe (34), and the main pipe (34) is provided with a control gate valve to control the intake Gas volume, the aerator (18) aerates into the tank of the aeration and oxygenation treatment unit (3) through the main pipe (34) and the aeration pipe (30), increasing the content of dissolved oxygen in the harmless water body to make dissolved oxygen Water body. the

The top of one side of the aeration and oxygenation treatment unit (3) is provided with a water outlet (12), and the pipeline (14) on the water outlet (12) is provided with a gate valve to control the flow of the water outlet (12). ) is connected to the water distribution pipe (19) of the wave-type multi-stage submerged flow wetland device (4), and the dissolved oxygen clear liquid water body after oxygenation is transported to the wave-type multi-stage submerged flow wetland device (4) by gravity, as shown in Figure 1, Shown in Figure 2 and Figure 5. the

Example 6

The multi-stage subsurface flow wetland treatment unit (4) is box-shaped as a whole, and is divided into at least 4 groups of subsurface flow wetland pools by a partition (33), which are arranged in turn as an inflow wetland pool (35) and 2 groups of decomposition and percolation wetland pools (36). and the outlet wetland pool (37), the water inlet wetland pool (35) and one of the decomposition and percolation wetland pools (36) are provided with a partition (33), and the top part of the partition (33) is higher than the decomposition and percolation layer (38), the bottom of the dividing plate (33) is provided with at least one horizontal overflow pipe (20), and the top of the dividing plate (33) is provided with at least one backwash communication port (43). A partition (33) is arranged between the effluent wetland pool (37) and another set of decomposition and percolation wetland pools (36), the top of the partition (33) is higher than the upper surface of the decomposition and percolation layer (38), and the partition The lower part of (33) is provided with at least one horizontal flow pipe (20), and the upper part of the partition (33) is provided with at least one backwash communication port (43). A partition (33) is set between the two components of the decomposition and filtration wetland pool (36), the partition (33) is installed in the decomposition and filtration layer (38), and the top of the partition (33) is lower than the decomposition and filtration layer (38), the decomposition and filtration layer (38) on the upper part of the 2-component decomposition and filtration wetland pool (36) is connected. The upper part of the pool wall at one end of the multi-stage subsurface flow wetland treatment unit (4) is provided with a backwash emptying port (32), and the backwashing emptying port (32) is used to decompose the backwashing water source of the percolation layer (38) and the blockage together. Discharge out of the multistage subsurface flow wetland treatment unit (4). the

At least one backwash pipeline (42) is arranged at the bottom of the pool of the multi-stage subsurface flow wetland treatment unit (4), and the backwash pipeline (42) is buried in the bottom layer of the decomposed percolation layer (38), and the backwash pipeline (42) Run through the bottom of the inlet wetland pool (35), the 2-component decomposition and percolation wetland pool (36) and the outlet wetland pool (37), the backwash pipeline (42) is connected with the backwash main pipe, and the backwash main pipe leads to Outside the pool, the main backwashing pipe is input backwashing water source to the backwashing pipeline (42) from the outside of the pool. the

At least one detection and observation shaft (27) is set in the water inlet wetland pool (35), the water outlet wetland pool (37) and the two-component decomposition and percolation wetland pool (36), and the detection and observation shaft (27) runs through the decomposition and percolation layer (38), until the bottom of the pond, the water level in the observation pond by detecting the observation shaft (27) and taking water samples from the detection observation well (27). the

The decomposing and percolating layer (38) is arranged in the subsurface wetland pool, and the decomposing and percolating layer (38) of the influent wetland pool (35) and the outflowing wetland pool (37) adopts gravel with a particle size of 2-4 cm, and two components decompose and infiltrate the wetland pool (36) adopt shale and ceramsite respectively, wherein the decomposed percolation layer (38) of one group of decomposition and percolation wetland pools (36) adopts the shale of particle size 4-8cm, another group of decomposition percolation wetland tanks (36 ) The decomposition percolation layer (38) adopts the ceramsite of particle diameter 2-4cm. the

Amphibious plants (23) are planted on the upper surface of the decomposed percolation layer (38), and the roots of the plants (23) are rooted in the decomposed percolation layer (38). , Zailihua, and Black Mitsubishi, plant at least one species, decompose the filler matrix of the percolation layer (38) to provide an attachment carrier for the microorganisms, and the microorganisms form a microbial film on the root system of the plant and the surface of the filler matrix, which is absorbed by the plant (23) Remove the pollutants in the water body, and move the pollutants out of the multi-stage subsurface flow wetland treatment unit (4) as the plants (23) are harvested, and the dissolved oxygen water flows through the inflow wetland pool (35), 2 groups The surface layer and the bottom layer of the decomposed percolation layer (38) are decomposed into the discharge water body by decomposing the percolation wetland pond (36) and the effluent wetland pond (37). the

The upper part of the pool wall at one end of the multi-stage subsurface flow wetland treatment unit (4) is provided with a water collection pipe (21) along the pool wall, and the water collection pipe (21) is installed in the decomposed percolation layer (38), and one end of the water collection pipe (21) is connected to the The water inlets (13) of the storage and discharge tanks (25) are connected, and gate valves are set at the outlet end of the water collection pipe (21) to control the amount of discharged water. The water collection pipe (21) inputs the collected water into the storage and discharge tank (25) . the

The upper part of the pool wall at the other end of the multi-stage subsurface flow wetland treatment unit (4) is provided with a water distribution pipe (19) along the pool wall, and the water distribution pipe (19) is installed in the decomposed percolation layer (38), and one end of the water distribution pipe (19) is connected to the The water outlets (12) of the aeration and oxygenation treatment unit (3) are connected, and the water inlet end of the water distribution pipe (19) is provided with a gate valve to control the water intake, and the oxygen dissolved in the aeration and oxygenation treatment unit (3) The water body evenly flows out and spreads in the decomposed percolation layer (38) of the water inlet wetland pool (35). the

One side of one end of the multi-stage subsurface flow wetland processing unit (4) is provided with an accumulation discharge pond (25), the accumulation discharge pond (25) is in a box shape as a whole, and the pool wall of the accumulation discharge pond (25) is in contact with the multistage subsurface flow wetland treatment unit ( 4) The pool wall of the water outlet wetland pool (37) is connected, and the water inlet (13) is set on the pool wall of the accumulation discharge pool (25) adjacent to the water outlet wetland pool (37), and the inlet of the accumulation discharge pool (25) The water outlet (13) is connected with the water collection pipe (21) of the outlet wetland pool (37), and the discharge pipe (26) is arranged on the pool wall at one end of the accumulation discharge pond (25), and the discharged water body after treatment is passed through the discharge pipe (26) ) into rivers or lakes. the

The middle part of one side of the multi-stage subsurface flow wetland treatment unit (4) is provided with an inspection and maintenance venting control well (28). The venting pipe (22) runs through one side well wall of the maintenance venting control well (28), in the influent wetland pool (35), the 2-component decomposition percolation wetland pool (36) and the multi-stage subsurface flow wetland treatment unit (4). The bottom of one side of the outlet wetland pool (37) is provided with a maintenance vent pipe (24), and the maintenance vent pipe (24) is connected to the water inlet wetland pool (35), the 2-component decomposition and percolation wetland pool (36) and the outlet wetland pool (37) ), the maintenance vent pipe (24) is connected and connected with the vent pipe (22) in the maintenance vent control well (28), and a control gate valve is set on the maintenance vent pipe (24) to form a maintenance vent pipeline. The multi-stage subsurface flow wetland treatment unit (4) is overhauled by venting the inlet wetland pool (35), the 2-component decomposition percolation wetland pool (36) and the outlet wetland pool (37) through the maintenance and venting pipeline. the

The flow direction of the dissolved oxygen clear liquid water entering the multi-stage subsurface flow wetland treatment unit (4) is from the water distribution pipe (19) into the water inlet wetland pool (35), and the self-weight of the water body flows through the two-component decomposition and percolation wetland pool (36) into the The effluent wetland pool (37) is collected and input into the discharge storage tank (25) by the water collection pipe (21), and the dissolved oxygen water body realizes the reaction process of aerobic, anaerobic, nitrification and denitrification repeatedly in the process of flowing. into discharge water bodies, as shown in Figure 1, Figure 2, and Figure 6. the

Example 7

The sewage source enters the sedimentation decomposition tank (6) from the sewage inlet (11) of the sedimentation decomposition tank (6) of the multi-stage sedimentation pretreatment unit (1) through the pipeline, and a certain amount of suspended solids, floating Matter and sediment, the specific gravity of the impurities contained in the sewage source is different. After the sewage source enters the sedimentation and decomposition tank (6), it will form floating scum, middle sewage water and sinking sediment. The closed sedimentation and decomposition tank (6) will form an exhaust Oxygen environment, the proteinaceous organic matter contained in the sewage source is decomposed by anaerobic fermentation, and produces ammonia and other substances, killing parasite eggs and germs, realizing precipitation, decomposition, fermentation, and sterilized sewage treatment, due to the action of water gravity. The middle sewage water body in the decomposition tank (6) enters the overflow pipe (9) from the inlet of the overflow pipe (9) arranged in the middle of the partition wall (33), and flows into the fermentation pipe from the outlet higher than the overflow pipe (9) In the sedimentation tank (7). the

The sewage water body in the fermentation sedimentation tank (7) is further fermented and precipitated. Compared with the sedimentation decomposition tank (6), the amount of scum and suspended matter in the fermentation sedimentation tank (7) is relatively reduced, and the sewage water body is in a relatively static state. The degree of decomposition and decomposition is low, which is conducive to the continuous fermentation, decomposition and precipitation of scum and suspended matter in the sewage water body. After the sewage water body is fermented and precipitated, the sewage in the middle layer of the fermentation sedimentation tank (7) is fermented due to the gravity of the water. The liquid enters the overflow pipe (9) from the inlet of the overflow pipe (9) arranged in the middle of the partition wall (33), and flows into the accumulator (8) from the outlet higher than the overflow pipe (9). the

The sewage liquid entering the storage tank (8) is further separated and precipitated, and is stored in the supernatant above the middle layer of the sewage liquid in the storage tank (8), and the remaining scum and suspended matter sink to the bottom of the tank. Entering the storage tank (8), the water level of the sewage liquid in the storage tank (8) also continues to rise, and the supernatant liquid of the sewage liquid flows from the water outlet (12) installed on the upper part of the tank wall through the pipeline (14) to the multi-stage The hydrolytic oxidation unit (2) enters the multi-stage hydrolytic oxidation unit (2) from the water inlet (13) at the lower part of the pool wall of the multi-stage hydrolytic oxidation unit (2), and the sewage source passes through the multi-stage sedimentation pretreatment unit (1) Multi-stage treatment removes scum, suspended matter and sediment, kills parasite eggs, pathogenic microorganisms and bacteria through fermentation, decomposition, precipitation and storage, and meets the design requirements of harmlessness. The sewage source passes through a multi-stage sedimentation pretreatment unit ( 1) The sewage clear liquid is prepared by pretreatment, and the sewage clear liquid enters the multi-stage hydrolysis acidification treatment unit (2). the

The multi-stage hydrolytic acidification treatment unit (2) is divided into at least 3 spaces by a partition (33), which is divided into an influent hydrolysis oxidation pool (39), a hydrolysis oxidation pool (40) and an outlet water hydrolysis oxidation pool (41). The upper part of (33) installs L-shaped water-passing pipe (16), installs hydrolysis filter layer (29) in the water inlet hydrolysis oxidation tank (39), hydrolysis oxidation tank (40) and outlet water hydrolysis oxidation tank (41), and hydrolysis filter layer (29) The surface of the hydrolyzed filter material adheres to the microbial population growing in the form of a biofilm. the

The sewage clear liquid enters the bottom of the hydrolysis filter layer (29) of the influent hydrolysis oxidation tank (39) from the water inlet (13) at the bottom of the multi-stage hydrolysis acidification treatment unit (2), and as the sewage clear liquid continuously flows into the influent water, it is hydrolyzed and oxidized In the hydrolysis filter layer (29) of the pool (39), the water level of the sewage clear liquid in the hydrolysis filter layer (29) is continuously raised, and the water level of the sewage clear liquid overflows the hydrolysis filter layer (29) of the influent hydrolysis oxidation tank (39). , rise to the top of the influent hydrolysis oxidation tank (39), reach the water outlet of the L-shaped overflow pipe (16) that is installed on the dividing plate (33) top, and the sewage clear liquid passes through the water inflow hydrolysis oxidation tank (39) After the hydrolytic oxidation of the hydrolytic filter layer (29), enter the bottom of the hydrolytic filter layer (29) of the hydrolytic oxidation tank (40) from the influent hydrolytic oxidation tank (39) through the L-shaped overcurrent pipe (16). the

Along with the continuous flow of sewage clear liquid into the hydrolysis filter layer (29) of the hydrolysis oxidation tank (40), the water level of the sewage clear liquid in the hydrolysis filter layer (29) is continuously promoted, and the water level of the sewage clear liquid overflows the hydrolysis oxidation tank (40 ) of the hydrolysis filter layer (29), rises to the top of the hydrolysis oxidation tank (40), and reaches the water outlet of the L-shaped overcurrent pipe (16) installed on the top of the partition (33), and the sewage clear liquid is once again hydrolyzed and oxidized After the hydrolytic oxidation of the hydrolytic filter layer (29) of the pool (40), enter the bottom of the hydrolytic filter layer (29) of the effluent hydrolytic oxidation tank (41) from the hydrolytic oxidation tank (40) by the L-shaped overflow pipe (16). the

As the sewage clear liquid continuously flows into the hydrolysis filter layer (29) of the effluent hydrolysis oxidation tank (41), the water level of the sewage clear liquid in the hydrolysis filter layer (29) continues to rise, and the water level of the sewage clear liquid overflows the effluent hydrolysis oxidation tank The hydrolysis filter layer (29) of (41) rises to the top of the effluent hydrolysis oxidation tank (41), reaches the water outlet (12) that is installed on the top of the pool wall of the multistage hydrolysis acidification treatment unit (2), and the sewage clear liquid After passing through the hydrolysis and oxidation of the hydrolysis filter layer (29) of the effluent hydrolysis oxidation tank (41) again, it enters the water collection effluent tank (5) through the water outlet (12) on the upper part of the pool wall, and the sewage clear liquid is treated by multi-stage hydrolysis and acidification The hydrolysis filter layer (29) of the unit (2), in the process of flowing through the hydrolysis filter layer (29), the microbial population attached to the surface of the hydrolysis filter material intercepts, absorbs and metabolizes the organic matter in the sewage clear liquid, and at the same time, the multi-stage The airtight anaerobic environment formed by the hydrolysis and acidification treatment unit (2) implements anaerobic fermentation on proteinaceous organic matter, decomposes proteinaceous organic matter and produces ammonia and other substances, plays a role in killing parasite eggs and germs, and degrades high-molecular organic matter It is low-molecular organic matter, organic nitrogen is degraded to inorganic nitrogen, and organic phosphorus is degraded to inorganic phosphorus, which is beneficial to the rapid degradation of the subsequent multi-stage subsurface flow wetland treatment unit (4), and improves the removal efficiency of wetland treatment for pollutants. the

The sewage clear liquid is hydrolyzed and oxidized by the multi-stage hydrolysis and acidification treatment unit (2) to make harmless water, which is accumulated in the water collection outlet pool (5). The submersible pump (31) in the water outlet pool (5) lifts the harmless water body into the aeration and oxygenation treatment unit (3) through the pipeline (14). the

Harmless water enters the aeration and oxygenation treatment unit (3) from the water inlet (13) of the aeration and oxygenation treatment unit (3), and the aerator (18) of the aeration and oxygenation treatment unit (3) passes through the trunk Pipe (34) and aeration pipe (30) carry out aeration and oxygenation treatment to harmless water body to make dissolved oxygen water body, carry out aeration and oxygenation treatment to harmless water body is the dissolved oxygen content in the harmless water body, is multi-level Aerobic microorganisms in the subsurface wetland treatment unit (4) provide an oxygen source. the

With the continuous increase of the dissolved oxygen water body in the aeration and oxygenation treatment unit (3), the dissolved oxygen water body flows from the water outlet (12) through the pipeline (14) into the water distribution pipe (19) of the multi-stage subsurface flow wetland treatment unit (4). ), the water distributing pipe (19) evenly spreads the dissolved oxygen water body in the decomposition and percolation layer (38) of the inflow wetland pool (35) of the multi-stage subsurface flow wetland treatment unit (4), with the water weight of the dissolved oxygen water body Force action fills the decomposed percolation layer (38) of the water inlet wetland pool (35), the water level in the water inlet wetland pool (35) continues to rise, and the dissolved oxygen water passes through the horizontal flow pipe (20 ) into the bottom of one set of decomposition and percolation wetland pools (36), dissolved oxygen water continuously pours into one set of decomposition and percolation wetland pools (36) and fills another set of decomposition and percolation wetland pools (36). the

The dissolved oxygen water body is filled with the decomposing and percolating layer (38) of one group of decomposing and percolating wetland ponds (36), and the water level in one group of decomposing and percolating wetland ponds (36) is constantly rising, and as the water level of the dissolved oxygen water body rises, High and over the top of the partition (33), the dissolved oxygen water enters another group of decomposition and infiltration wetland pools (36) from the top of the partition (33), and the continuous inflow of the dissolved oxygen water fills another group of decomposition and filtration wetland pools (36 ), the water level in the other group of decomposition and filtration wetland pools (36) is constantly rising, and the horizontal flow pipe at the bottom of the clapboard (33) will (20) enter the decomposed percolation layer (38) of the effluent wetland pool (37), and the dissolved oxygen water continuously pours into the decomposed percolation layer (38) of the effluent wetland pool (37) and fills the effluent wetland pool (37), The water level in the effluent wetland pool (37) rises continuously, and reaches the position of the water collection pipe (21) along with the rise of the water level of the dissolved oxygen water body. the

The dissolved oxygen water enters the multi-stage subsurface flow wetland treatment unit (4), flows through the decomposition and percolation layer (38) of the influent wetland pool (35), the two-component decomposition and percolation wetland pool (36) and the outlet wetland pool (37) to form Wave-like flow, the decomposed percolation layer (38) of the influent wetland pool (35), the two-component decomposed percolation wetland pool (36) and the outlet wetland pool (37) constitutes a "matrix-plant-microbe" ecosystem , the root system of the plant is rooted in the surface layer of the decomposed percolation layer (38), the filler matrix of the decomposed percolation layer (38) provides a carrier for the microorganisms to attach to, the root system of the plant provides the oxygen source for the microorganisms, and the filler near the root zone The matrix layer forms an aerobic zone, and the filler matrix layer away from the root zone forms an anaerobic zone or a facultative zone. The oxygen-dissolved water flows through the surface and bottom layer of the decomposed percolation layer (38) during the flow, and repeatedly passes through the aerobic and anaerobic zones. Oxygen, nitrification and denitrification reaction process, implement efficient removal of organic pollutants and nitrogen and phosphorus in the dissolved oxygen water body to make discharge water body, the discharge water body is collected in the water collection pipe (21), and the discharge water body enters the discharge accumulation from the water collection pipe (21) Accumulate in the pond (25), discharge to river course or lake by discharge pipe (26) again, as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6. the

Example 8

When the dissolved oxygen water body is running in the multi-stage subsurface flow wetland treatment unit (4), the inflow wetland pool (35), the 2-component decomposition and infiltration wetland pool (36) and the outlet wetland pool ( 37) whether the operation status meets the design requirements, take water samples from the detection and observation shaft (27) to test whether the water quality meets the design requirements, adjust the gate valve on the water distribution pipe (19) in time, control the water intake, and inhibit the decomposition of the percolation layer ( 38) in the water velocity, adjust and decompose the percolation layer (38) to be in the optimum decomposition state, as shown in Fig. 1, Fig. 2 and Fig. 6. the

Example 9

When the dissolved oxygen water body is running in the multi-stage subsurface flow wetland treatment unit (4), the inflow wetland pool (35), the 2-component decomposition and infiltration wetland pool (36) and the outlet wetland pool ( 37) whether the operation status meets the design requirements, take water samples from the detection and observation shaft (27) to test whether the water quality meets the design requirements, adjust the gate valve on the water distribution pipe (19) in time, control the water intake, and inhibit the decomposition of the percolation layer ( 38) in the water velocity, adjust and decompose the percolation layer (38) to be in the optimum decomposition state, as shown in Fig. 1, Fig. 2 and Fig. 6. the

Example 10

When the multi-stage sedimentation pretreatment unit (1) runs for a period of time, the bottom of the sedimentation and decomposition tank (6), the fermentation sedimentation tank (7) and the storage tank (8) has deposited sediment, and the sedimentation and decomposition tank (6) needs to be adjusted according to the design requirements. ), the fermentation sedimentation tank (7) and the storage tank (8) implement slag removal and desilting, close the gate valve on the pipeline (14) of the sewage inlet (11), stop the inflow of the sewage source, and close the water outlet (12) The gate valve on the pipeline (14) stops the outflow of the sewage source after the sewage treatment. Open the sealing cover of the slag removal port (10) on the top of the precipitation decomposition tank (6), the fermentation sedimentation tank (7) and the storage tank (8), and remove the precipitation decomposition tank (6), the fermentation sedimentation tank (7) and the storage tank (8) ), remove the attached dirt on the inner wall of the overflow pipe (9), the sewage inlet (11) and the water outlet (12), and keep it unimpeded. Close the sealing cover of the sedimentation and decomposition tank (6), the fermentation sedimentation tank (7) and the slag removal port (10) at the top of the storage tank (8), open the gate valve and the water outlet on the pipeline (14) of the sewage inlet (11) The gate valve on the pipeline (14) of (12) starts the multi-stage precipitation pretreatment unit (1) to resume operation, as shown in Fig. 1 , Fig. 2 and Fig. 3 . the

Example 11

After the multi-stage hydrolysis and acidification treatment unit (2) has been in operation for a period of time, the influent hydrolysis oxidation pond (39), the hydrolysis oxidation pond (40), the effluent hydrolysis oxidation pond (41) and the water collection and discharge pond (5) are implemented according to the design requirements. Overhaul and maintenance, close the gate valve on the pipeline (14) of the water inlet (13), stop the inflow of the clear liquid sewage water body, empty the harmless water body in the multi-stage hydrolysis acidification treatment unit (2), close the water outlet (12 ) on the pipeline (14), open the submersible pump (31) to empty the harmless water body in the water collection outlet pool (5), and close the submersible pump (31). Open the sealing cover on the top inspection port (15) of the water inlet hydrolysis oxidation pond (39), the hydrolysis oxidation pond (40) and the water outlet hydrolysis oxidation pond (41), to the water inlet hydrolysis oxidation pond (39), the hydrolysis oxidation pond ( 40) and the effluent hydrolysis oxidation tank (41) implement overhaul and maintenance, clean the attached dirt on the pool wall of the water collection effluent tank (5), clean the L-shaped overflow pipe (16), water inlet (13) and water outlet ( 12) Adhesive dirt on the inner wall, keep it unobstructed, overhaul and maintain the submersible pump (31). After the overhaul and maintenance are finished, close the sealing cover on the top inspection port (15) of the water inlet hydrolysis oxidation pond (39), the hydrolysis oxidation pond (40) and the outlet water hydrolysis oxidation pond (41), open the pipe of the water inlet (13) The gate valve on the pipeline (14) of the gate valve water outlet (12) on the road (14) starts the multi-stage hydrolysis acidification treatment unit (2) to resume operation, as shown in Figure 1, Figure 2, and Figure 4. the

Example 12

After the aeration and oxygenation processing unit (3) has been in operation for a period of time, the aeration and oxygenation processing unit (3) is overhauled and maintained according to the design requirements, the gate valve on the pipeline (14) of the water inlet (13) is closed, and the cleaning is stopped. The inflow of the liquid sewage water body, emptying the dissolved oxygen water body in the aeration and aeration treatment unit (3), closing the gate valve on the pipeline (14) of the water outlet (12), clearing the aeration and aeration treatment unit (3) Attach dirt on the pool wall, clean main pipe (34) and aeration pipe (30), keep unimpeded, overhaul and maintain aerator (18). Open the gate valve on the pipeline (14) of the water inlet (13), inject clear liquid and sewage water, open the gate valve on the pipeline (14) of the water outlet (12), and connect to the multi-stage subsurface flow wetland treatment unit (4) The water distribution pipe (19) transports the dissolved oxygen water body, turns on the aerator (18), and aerates the clear liquid sewage water body in the aeration and oxygenation treatment unit (3) through the main pipe (34) and the aeration pipe (30). Oxygen, the aeration and oxygenation treatment unit (3) resumes operation, as shown in Figure 1, Figure 2, and Figure 5. the

Example 13

When the multi-stage subsurface flow wetland treatment unit (4) runs for a period of time, the decomposed percolation layer (38) is blocked, and the obstructions in the decomposed percolation layer (38) affect the decomposition reaction of the decomposed percolation layer (38). The percolation layer (38) implements backwashing, closes the gate valve on the water distribution pipe (19), stops inputting the dissolved oxygen water body, empties the discharge water body in the water collection pipe (21), and closes the gate valve on the water collection pipe (21). Inject the backwash water source from the backwash main pipe to the backwash pipeline (42), flush the decomposed percolation layer (38), and backwash the obstruction in the decomposed percolation layer (38) to the influent wetland pool (35), The top of the 2-component decomposition and percolation wetland pool (36) and the outlet wetland pool (37), the backwash water source and obstructions on the top of the outlet wetland pool (37) are emptied through the backwash on the upper part of the multi-stage subsurface flow wetland unit (4) The port (32) discharges the multi-stage subsurface flow wetland unit (4). Stop injecting the backwash water source into the backwash pipeline (42), close the backwash emptying port (32), open the water inlet wetland pool (35), the 2-component decomposition percolation wetland pool (36) and the water outlet wetland pool (37) Check and repair the gate valve on the vent pipe (24), empty the inlet wetland pool (35), the 2-component decomposition percolation wetland pool (36) and the outlet wetland pool (37) to backwash the water body from the vent pipe (22), and close Open the gate valve on the water distribution pipe (19) and start inputting the solution Oxygen water body, open the gate valve on the water collection pipe (21), and the multi-stage subsurface flow wetland treatment unit (4) resumes operation, as shown in Fig. 1, Fig. 2 and Fig. 6 . the

Example 14

After the multi-stage subsurface flow wetland treatment unit (4) has been in operation for a long time, it is necessary to overhaul and maintain the multi-stage subsurface flow wetland treatment unit (4) according to the design requirements, close the gate valve on the water distribution pipe (19), stop water intake, and discharge Discharge water in the water pipe (26), close the gate valve of the water collection pipe (26), stop the water outlet, open the inspection and discharge of the water inlet wetland pool (35), the 2-component decomposition percolation wetland pool (36) and the water outlet wetland pool (37) The gate valve on the empty pipe (24) is used to empty the inlet wetland pool (35), the 2-component decomposition infiltration wetland pool (36) and the sewage treatment water body of the outlet wetland pool (37) from the emptying pipe (22), for multi-level subsurface flow The wetland treatment unit (4) implements overhaul and maintenance. Clean the dirt that is attached to the inwall of the water distribution pipe (19), the water collection pipe (21) backwash communication port (43) and the backwash emptying port (32), and clean and decompose the planting on the upper surface of the percolation layer (38). After the maintenance is over, close the gate valves on the maintenance vent pipes (24) of the inlet wetland pool (35), the 2-component decomposition and percolation wetland pool (36) and the outlet wetland pool (37), and open the gate valve on the water distribution pipe (19) , start water intake, open the gate valve of the water collection pipe (26), start water discharge, and the multi-stage subsurface flow wetland processing unit (4) resumes operation, as shown in Fig. 1, Fig. 2 and Fig. 6 . the

Claims (2)

1. multistage sewage disposal bio-reaction system, it is characterized in that by multi stage precipitation pretreatment unit (1), multistage acidication processing unit (2), aeration oxygen replenishing processing unit (3) and multistage current wetland processing unit (4) are connected to form by pipeline (14), the water inlet wetland pond (35) of multistage current wetland processing unit (4), 2 component Xie Shenlvshidichi (36) and go out meadow bog pond (37) and be arranged in order, one side of multistage current wetland processing unit (4) sets gradually multi stage precipitation pretreatment unit (1) side by side, multistage acidication processing unit (2) and aeration oxygen replenishing processing unit (3), and be connected by pipeline (14), perhaps multi stage precipitation pretreatment unit (1) is arranged in order multistage acidication processing unit (2) is set, aeration oxygen replenishing processing unit (3) and multistage current wetland processing unit (4), and be connected by pipeline (14);

Multi stage precipitation pretreatment unit (1) is closed box, casing inner route clapboard (33) is separated at least 3 spaces, its space respectively is precipitation decomposing pool (6), fermentation settling tank (7) and impoundment dedicated (8), each top of space is provided with airtight slag removing hole (10), slag removing hole is installed sealing cover on (10), constitutes airtight running space; The pool wall top of the precipitation decomposing pool (6) of multi stage precipitation pretreatment unit (1) one side is provided with dirt inlet (11), dirt inlet (11) is introduced source of sewage by pipeline (14), on the pipeline (14) of dirt inlet (11) gate valve is set, the influx of control source of sewage, source of sewage is sanitary sewage and breeding wastewater; Dividing plate (33) middle part between precipitation decomposing pool (6) and fermentation settling tank (7) is provided with (9) at least 1 of the flow tubes of inclination, and the inlet of the flow tube (9) of precipitation decomposing pool (6) is lower than the outlet of the flow tube (9) of the settling tank (7) that ferments; Dividing plate (33) middle part between fermentation settling tank (7) and the impoundment dedicated (8) is provided with the flow tube (9) of inclination, and the inlet of the flow tube (9) of fermentation settling tank (7) is lower than the outlet of the flow tube (9) of impoundment dedicated (8); The pool wall top of the impoundment dedicated (8) of multi stage precipitation pretreatment unit (1) opposite side sets out the mouth of a river (12), be connected with the water-in (13) of the pool wall bottom of multistage acidication processing unit (2) by pipeline (14), pipeline is provided with gate valve on (14), the control output flow, pipeline is provided with the control gate valve on (14), the flow of the control multistage acidication processing unit of input (2), the flow direction that enters the source of sewage of multi stage precipitation pretreatment unit (1) utilizes the deadweight of water body to flow to water outlet (12) following current of multi stage precipitation pretreatment unit (1) the other end by flow tube (9) from the dirt inlet (11) of multi stage precipitation pretreatment unit (1) one end;

Multistage acidication processing unit (2) is closed box, the pool wall bottom of multistage acidication processing unit (2) one ends is provided with water-in (13), the pool wall top of multistage acidication processing unit (2) the other end sets out the mouth of a river (12), on the pipeline (14) of water outlet (12) gate valve is set, the control output flow; The casing inner route clapboard (33) of multistage acidication processing unit (2) is separated at least 3 spaces, its space is followed successively by into water hydrolysis oxidation pond (39), hydrolysis oxidation pond (40) and water outlet hydrolysis oxidation pond (41), water inlet hydrolysis oxidation pond (39), the top in hydrolysis oxidation pond (40) and water outlet hydrolysis oxidation pond (41) is provided with airtight access hole (15) respectively, access hole is installed sealing cover on (15), in water inlet hydrolysis oxidation pond (39), on the dividing plate (33) in hydrolysis oxidation pond (40) and water outlet hydrolysis oxidation pond (41) L shaped flow tube (16) is set, the water-in of L shaped flow tube (16) is higher than the top ends of hydrolysed filtrate layer (29), collect the sewage water body of implementing hydrolysed filtrate through hydrolysed filtrate layer (29), the water outlet of L shaped flow tube (16) is in the bottom in another spatial hydrolysed filtrate layer (29), the sewage water body of hydrolysed filtrate is transported to next hydrolysed filtrate layer, is communicated with water inlet hydrolysis oxidation pond (39), hydrolysis oxidation pond (40) and water outlet hydrolysis oxidation pond (41); In water inlet hydrolysis oxidation pond (39), hydrolysis oxidation pond (40) and water outlet hydrolysis oxidation pond (41), hydrolysed filtrate layer (29) is set, the top ends of hydrolysed filtrate layer (29) is lower than the water-in and the water outlet on the pool wall (12) of L shaped flow tube (16), fill acidication in the hydrolysed filtrate layer (29) and consider material (17), acidication is considered material (17) and is adopted haydite or the polyethylene elastomer of particle diameter 1-2cm to fill out grain; The flow direction that enters the clear liquid water body of multistage acidication processing unit (2) utilizes the deadweight of water body to flow to water outlet (12) following current of multistage acidication processing unit (2) the other end by L shaped flow tube (16) from the water-in (13) of multistage acidication processing unit (2) one ends;

Aeration oxygen replenishing processing unit (3) integral body is box-shaped, water-in (13) is set on the pool wall of aeration oxygen replenishing processing unit (3) one ends, pipeline (14) on the water-in (13) is provided with gate valve, the flow of control water-in (13), the clear liquid water body of the hydrolysis oxidation in the outlet sump that catchments (5) enters in the aeration oxygen replenishing processing unit (3) from water-in (13) by pipeline (14); The pool wall top of aeration oxygen replenishing processing unit (3) the other end is provided with aerator (18), the bottom, pond of aeration oxygen replenishing processing unit (3) is provided with 1 aeration tube (30) at least along the bottom, pond, aeration tube (30) is connected with main pipe (34), aerator (18) is connected with main pipe (34) end, main pipe is provided with the control gate valve on (34), the air input of control aeration tube (30), aerator (18) is by main pipe (34) and aeration tube (30) aeration in the pond of aeration oxygen replenishing processing unit (3); The top of one side of aeration oxygen replenishing processing unit (3) sets out the mouth of a river (12), pipeline (14) on the water outlet (12) is provided with gate valve, the flow of control water outlet (12) is connected with the water distributor (19) of the multistage subsurface flow wetland unit of wave (4) by pipeline (14);

Multistage current wetland processing unit (4) integral body is box-shaped, be separated at least 4 group current wetland ponds by dividing plate (33), be arranged in order and be water inlet wetland pond (35), 2 component Xie Shenlvshidichi (36) and go out meadow bog pond (37), water inlet wetland pond (35) and wherein between the component Xie Shenlvshidichi (36) dividing plate (33) is set, the top ends of dividing plate (33) is higher than the upper epidermis that decomposes filter layer (38), the bottom of dividing plate (33) is provided with (20) at least 1 of horizontal flow tubes, the top of dividing plate (33) is provided with (43) at least 1 of back flushing connected entrances, and back flushing connected entrance (43) is higher than the top layer of decomposing filter layer (38); Go out between meadow bog pond (37) and another component Xie Shenlvshidichi (36) dividing plate (33) is set, the top ends of dividing plate (33) is higher than the upper epidermis that decomposes filter layer (38), the bottom of dividing plate (33) is provided with (20) at least 1 of horizontal flow tubes, the top of dividing plate (33) is provided with (43) at least 1 of back flushing connected entrances, and back flushing connected entrance (43) is higher than the top layer of decomposing filter layer (38); Between the 2 component Xie Shenlvshidichi (36) dividing plate (33) is set, dividing plate (33) is installed in and decomposes in the filter layer (38), the top ends of dividing plate (33) is lower than decomposes filter layer (38), and the decomposition filter layer (38) on 2 component Xie Shenlvshidichi (36) tops is connected; The pool wall top of multistage current wetland processing unit (4) one ends is provided with back flushing evacuation port (32), and back flushing water source and obturator that back flushing evacuation port (32) decomposes filter layer (38) with back flushing are discharged outside the multistage current wetland processing unit (4) together; The bottom, pond of multistage current wetland processing unit (4) is provided with (42) at least 1 of counter-flushing pipelines, counter-flushing pipeline (42) is embedded in the bottom that decomposes filter layer (38), counter-flushing pipeline (42) runs through into water wetland pond (35), 2 component Xie Shenlvshidichi (36) and goes out the bottom, pond in meadow bog pond (37), counter-flushing pipeline (42) is connected with the back flushing main pipe, the back flushing main pipe is drawn outside the pond, and export-oriented counter-flushing pipeline (42) injects the obturator that filter layer is decomposed in the flushing of back flushing water source to the back flushing main pipe from the pond; Respectively in water inlet wetland pond (35), go out to be provided with at least in meadow bog pond (37) and the 2 component Xie Shenlvshidichi (36) 1 and detect observation vertical shaft (27), detect observation vertical shaft (27) and run through decomposition filter layer (38), until the bottom, pond, observe water sampling the well (27) by the water level in detection observation vertical shaft (27) the observation pond and from detecting;

Be provided with in the current wetland pond and decompose filter layer (38), water inlet wetland pond (35) and go out the gravel of decomposition filter layer (38) the employing particle diameter 2-4cm in meadow bog pond (37), 2 component Xie Shenlvshidichi (36) adopt shale and haydite respectively, wherein the decomposition filter layer (38) of a component Xie Shenlvshidichi (36) adopts the shale of particle diameter 4-8cm, and the decomposition filter layer (38) of another component Xie Shenlvshidichi (36) adopts the haydite of particle diameter 2-4cm; Decompose the upper surface of filter layer (38) and plant amphibious kind of plant (23), the root system of kind of plant (23) is taken root in decomposing filter layer (38), the filler matrix that decomposes filter layer (38) adheres to carrier for microorganism provides, microorganism forms microbial film on the root system and the filler matrix surface of kind of plant, absorb the pollutent of removing in the water body by kind of plant (23), and along with the harvesting of kind of plant (23) is shifted out multistage current wetland processing unit (4) with pollutent;

The pool wall top of multistage current wetland processing unit (4) one ends is installed along pool wall and is received water pipe (21), receiving water pipe (21) is installed in the decomposition filter layer (38), an end of receiving water pipe (21) is connected with the water-in (13) of accumulating discharging pond (25), the water outlet end of receiving water pipe (21) is provided with gate valve, the water yield that control is discharged, receipts water pipes (21) are input to the water body of collecting to be accumulated in the discharging pond (25); The pool wall top of multistage current wetland processing unit (4) the other end is provided with water distributor (19) along pool wall, water distributor (19) is installed in and decomposes in the filter layer (38), one end of water distributor (19) is connected with the water outlet (12) of aeration oxygen replenishing processing unit (3), the water inlet end of water distributor (19) is provided with gate valve, the control flooding quantity is outflow uniformly is spread in the decomposition filter layer (38) of into water wetland pond (35) through the water body behind aeration oxygen replenishing processing unit (3) dissolved oxygen;

Overhaul blow-down pipe (24) and water inlet wetland pond (35), 2 component Xie Shenlvshidichi (36) and go out meadow bog pond (37) and connect, the flow direction that dissolved oxygen clear liquid water body enters multistage current wetland processing unit (4) is to enter into water wetland pond (35) from water distributor (19), utilize the deadweight of the water body 2 component Xie Shenlvshidichi (36) that flow through to enter out meadow bog pond (37), pack up and be input in the discharging impoundment dedicated (25) by receiving water pipes (21).

2. multistage sewage disposal bio-reaction system according to claim 1, the outer outlet sump (5) that catchments that is provided with of pool wall that it is characterized in that described multistage acidication processing unit (2) the other end, outlet sump (5) integral body of catchmenting is box-shaped, the outlet sump (5) that catchments is connected with the pool wall of multistage acidication processing unit (2) the other end, the water outlet (13) of multistage acidication processing unit (2) connects with the outlet sump (5) that catchments, the catchment pool wall top of opposite side of outlet sump (5) sets out the mouth of a river (12), outlet sump (5) inner bottom part that catchments is installed submersible pump (31), and submersible pump (31) passes water outlet (12) by pipeline (14) the clear liquid water body of hydrolysis oxidation is transported in the aeration oxygen replenishing processing unit (3);

Discharging pond (25) is accumulated in one side setting of one end of multistage current wetland processing unit (4), accumulate discharging pond (25) integral body and be box-shaped, the pool wall of accumulating discharging pond (25) is connected with the pool wall that goes out meadow bog pond (37) of multistage current wetland processing unit (4), with go out meadow bog pond (37) adjacent accumulate the discharging pond (25) pool wall on water-in (13) is set, the water-in (13) of accumulating discharging pond (25) is connected with the receipts water pipe (21) that goes out meadow bog pond (37), accumulate on the pool wall of discharging pond (25) one ends delivery pipe (26) is set, after treatment water body is discharged into river course or lake by delivery pipe (26);

The middle part of multistage current wetland processing unit (4) one sides is provided with maintenance emptying control well (28), maintenance emptying control well (28) integral body is box-shaped, in the maintenance emptying control well (28) blow-down pipe (22) is set, blow-down pipe (22) runs through a side borehole wall of maintenance emptying control well (28), water inlet wetland pond (35) at multistage current wetland processing unit (4), 2 component Xie Shenlvshidichi (36) and go out meadow bog pond (37) one side bottoms be provided with the maintenance blow-down pipe (24), maintenance blow-down pipe (24) blow-down pipe (22) interior with overhauling emptying control well (28) is connected and connects, the control gate valve is set on the maintenance blow-down pipe (24) constitutes the maintenance blowdown piping, by maintenance blowdown piping emptying water inlet wetland pond (35), 2 component Xie Shenlvshidichi (36) and go out meadow bog pond (37) maintenance multistage current wetland processing unit (4).

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