CN212375121U

CN212375121U - Natural environment simulation biological sewage treatment system

Info

Publication number: CN212375121U
Application number: CN202020792473.0U
Authority: CN
Inventors: 翁祖增; 周珊珊; 辛丰; 王亚飞
Original assignee: Kunshan Yangcheng Langu Environmental Institute Co ltd
Current assignee: Kunshan Yangcheng Langu Environmental Institute Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-01-19
Anticipated expiration: 2030-05-13

Abstract

A biological sewage treatment system simulating natural environment comprises four-stage treatment systems which are sequentially connected through a sewage pipeline (D), wherein a primary sedimentation tank (11) and a flat membrane micro-filtration tank (12) are installed in a first-stage treatment system (1), and a biological net membrane biological treatment tank (21) is installed in a second-stage treatment system (2) and is filled with a porous supporter (22); a substrate-microorganism-plant composite ecological groove (31) filled substrate (311) and a filled filler (312) are arranged in the third-stage treatment system (3), aquatic plants (313) are arranged on the top of the filler (312), an adsorption-disinfection-sterilization treatment groove (41) filled with catalytic activated carbon (411) and sprayed with molecular weak acidic HOCl water is arranged in the fourth-stage treatment system (4); the sewage treatment system has the advantages of compact structure, obvious reduction of occupied area, low construction investment and low operating cost, can adapt to sewage with relatively high pollutant concentration, can be constructed in urban centers, and can effectively implement energy conservation, environmental protection and sustainable development of sewage treatment in water resource-deficient areas.

Description

Natural environment simulation biological sewage treatment system

Technical Field

The utility model relates to a multistage treatment technology or biological treatment technology of waste water or sewage, in particular to a natural environment simulation biological sewage treatment system.

Background

The method has the advantages of large discharge amount of various waste water, complex composition, very high concentration of some waste water, deep color and high content of toxic and harmful substances, particularly, organic substances with benzene rings, such as aniline, nitrobenzene, phenol and anthraquinone, are generally pretreated by adsorption, filtration, coagulation, catalytic oxidation and the like, the biodegradability of the discharged water is not higher than 0.35, and the discharged water cannot directly enter an aeration tank.

Environmental biology is a branch of environmental science, and studies the rules and mechanisms of interaction between organisms and environments interfered by human beings, and mainly focuses on the concept of sustainable development and the strategic problems of environmental protection and sustainable development, which are widely concerned by international society in the aspects of human society and environmental ecology.

Biological treatment of wastewater is increasingly valued by people, and in the 4 th stage of design technology 2010, Yuan Ming 32704is published in the application review of environmental biotechnology in wastewater treatment, and the current situation and the development trend of biological nitrogen and phosphorus removal for treating high-concentration organic wastewater, refractory organic wastewater and biological nitrogen and phosphorus removal by using a biological method are mainly described.

Building knowledge 2014(000) and B05 disclose that environmental biology is a new interdisciplinary discipline between environmental biology and biology in recent years, most organic matters in sewage can provide nutrients such as carbon sources for the growth and propagation of microorganisms, and the water quality is improved due to the reduction of the concentration of the organic matters. In recent years, many studies have been made on the application of environmental biotechnology to sewage treatment, and 3 techniques such as biological fermentation, biological enhancement, and biological reaction are listed based on the principle of action of microorganisms, and the development of microbiology in sewage treatment in the future is expected.

The natural biological treatment method utilizes microorganisms growing and propagating under natural conditions to treat sewage to form an ecological system consisting of water or soil, microorganisms and plants, and performs a series of physical, chemical and biological purification on pollutants. The ecological system can fully utilize nutrient substances in the sewage, is beneficial to the growth of green plants, and realizes the reclamation, harmlessness and stabilization of the sewage. The natural biological treatment method has simple process, low cost and high efficiency, and is a sewage treatment mode according with the ecological principle; but is easily affected by natural conditions and occupies a larger area.

In the prior art, the traditional sewage treatment plant has more defects, generally, the traditional sewage treatment plant is located outside a city range and is a large energy-producing centralized cement building group, the sewage treatment plant occupies a large area and has more auxiliary facilities, and the sewage treatment facility is generally not beautiful, has large smell and does not have an ecological service function; further, centralized treatment facilities, which lead sewage from actual production sites, urban residents and commercial areas to treatment plants, also make the reuse of sewage obliged to rely on capital-intensive support, requiring the construction of a large number of auxiliary facilities such as piping networks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a biological sewage treatment system of simulation natural environment, in the area that the water resource is deficient, effectively implement sewage treatment energy-concerving and environment-protective and sustainable development.

The purpose of the utility model is realized by the following technical measures: the device comprises a four-stage treatment system which is sequentially connected through a sewage pipeline, wherein a primary sedimentation tank and a flat membrane micro-filtration tank are arranged in the first-stage treatment system, a coarse grid and a fine grid are arranged in the primary sedimentation tank, and a metal filtration membrane is arranged in the flat membrane micro-filtration tank; a biological net film biological treatment tank is arranged in the second-stage treatment system, and a porous supporter is filled in the biological net film biological treatment tank; a substrate-microorganism-plant composite ecological tank is arranged in the third-stage treatment system, the front end of the substrate-microorganism-plant composite ecological tank is filled with a substrate, the main body of the substrate-microorganism-plant composite ecological tank is filled with a filler, the top of the filler is provided with aquatic plants, and a water inlet pipe and a water collecting pipe are respectively arranged outside the front end and the rear end of the substrate-microorganism-plant composite ecological tank; an adsorption-disinfection-sterilization treatment tank is arranged in the fourth-stage treatment system, and is filled with catalytic activated carbon and sprayed with molecular weakly acidic HOCl water; an intermediate tank is connected between the biological net film biological treatment tank and the substrate-microorganism-plant composite ecological tank.

Particularly, a metal filtering membrane is flatly laid on the upper part in the flat-membrane micro-filtration tank, a cleaning spray head is arranged on the upper part of the flat-membrane micro-filtration tank, namely the upper side of the metal filtering membrane, and the cleaning spray head is arranged on the travelling mechanism.

In particular, the catalytic activated carbon takes coconut shell activated carbon as a substrate, the surface of the coconut shell activated carbon is covered with a noble metal layer, the particle size of the catalytic activated carbon is 20-40 meshes, and the specific surface area is not more than 1000m²/g。

Particularly, the top of the biomembrane biological treatment tank is a necking opening, a porous supporter is filled in the biomembrane biological treatment tank, the opening at the top of the biomembrane biological treatment tank is provided with a running water inlet, the upper part of the outer wall of the biomembrane biological treatment tank is provided with a running water outlet, and the outer wall of the bottom of the biomembrane biological treatment tank is provided with an air inlet.

In particular, the system porosity after the packing is installed is not less than 0.3.

In particular, the porous support has an open pore structure and a maximum specific surface area.

In particular, the primary treatment system is installed in the main room.

In particular, the bottom of a primary sedimentation tank, a flat membrane micro-filtration tank, a biological net membrane biological treatment tank, an intermediate tank and a substrate-microorganism-plant composite ecological tank is connected with a sludge pipeline E.

Particularly, a separation wall is erected between the matrix and the filler, and a plurality of water distribution pipes communicated with two sides of the separation wall are uniformly arranged on the separation wall in a penetrating way.

Particularly, the bottom surface of the primary sedimentation tank is higher than the top surface of the flat membrane micro-filtration tank 12, the bottom surface of the flat membrane micro-filtration tank is positioned on the horizontal plane or above the ground, the top surfaces of the biological net membrane biological treatment tank, the substrate-microorganism-plant composite ecological tank and the adsorption-disinfection-sterilization treatment tank are respectively higher than the horizontal plane or above the ground by 1M, and the bottom surface is lower than the horizontal plane or below the ground by 1M; the top surface of the middle groove is flush with the horizontal plane or the ground.

The utility model discloses an advantage and effect: the biological sewage treatment system simulates a completely closed odorless plant garden bionic natural ecological environment, biologically purifies sewage, has stable water outlet, obviously improves the sewage treatment effect, has a compact structure, obviously reduces the occupied area, has low construction investment and low operating cost, can adapt to sewage with relatively high pollutant concentration, even can be constructed in a city center, and has wide application.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a flat membrane microfiltration tank in an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a second-stage processing system according to an embodiment of the present invention.

FIG. 4 is a schematic view of the second stage treatment system of FIG. 3 showing microorganisms entrapped in the porous support network.

Fig. 5 is a schematic plane structure diagram of the substrate-microorganism-plant composite ecological groove in the embodiment of the present invention.

Fig. 6 is a schematic vertical section of a substrate-microorganism-plant composite ecological groove in the embodiment of the present invention.

Fig. 7 is a schematic structural view of an adsorption-disinfection-sterilization treatment tank in an embodiment of the present invention.

The reference numerals include: the device comprises a main machine room A, a sewage inlet B, a water outlet C, a sewage pipeline D, a sludge pipeline E, a first-stage treatment system 1, a second-stage treatment system 2, a third-stage treatment system 3, a fourth-stage treatment system 4, a middle tank 5, a primary sedimentation tank 11, a coarse grating 111, a fine grating 112, a flat-film micro-filtration tank 12, a metal filter membrane 121, a cleaning spray head 122, a walking mechanism 123, a biological net membrane biological treatment tank 21, a porous supporter 22, a flowing water inlet 23, a flowing water outlet 24, an air inlet 25, a matrix-microorganism-plant composite ecological tank 31, a matrix 311, a filler 312, aquatic plants 313, a water inlet pipe 314, a water distribution pipe 315, a water collection pipe 316, an adsorption-disinfection-sterilization treatment tank 41 and catalyst activated carbon 411.

Detailed Description

The principle of the utility model lies in that the latest research breakthrough in the field of ecology and the scientific research result of precise water treatment engineering create conditions for the mode innovation of urban sewage treatment; the bionic technology and strategy and the environmental biological natural purification principle are developed in great foundation and engineering science fields, and show good application prospect.

The utility model discloses a borrow for reference and imitate in nature diversified constitution of biomaterial, exquisite structure, gentle formation process and powerful function, design and prepare multiple high performance membrane material to be applied to links such as water treatment, gas separation, organic micromolecule liquid mixture separation with it.

The utility model discloses with the mode of the engineering management ecosystem in simulation plant garden, realize municipal sewage optimal treatment, compare with the conventional art, when reaching better treatment, still obtain the power consumption low, the occupy-place is little, and odorless, noiselessness, the outward appearance is generous to technical advantage harmonious with the surrounding environment.

Compared with the prior art, the utility model discloses a construction system nature bionical ecological environment, full play aquatic plant's multiple ecological function creates more diversified sewage biological treatment flow, reaches the utility model discloses handle sewage's purpose to form sustainable view ecosystem, this kind of sustainable development sewage treatment mode is particularly in population intensive, and the area that the soil is scarce is worth promoting on a large scale and is implemented.

The utility model discloses a biological sewage treatment system simulating natural environment, which comprises four-stage treatment flows connected in sequence, wherein the first-stage treatment system 1 removes SS and partial COD by primary sedimentation, grating and flat membrane microfiltration; a biological net film biological treatment tank 21 is arranged in the second-stage treatment system 2 to remove COD, BOD, SS and ammonia nitrogen; a substrate-microorganism-plant composite ecological tank 31 is arranged in the third-stage treatment system 3 to remove COD, BOD, total P, heavy metals and nitrate nitrogen; the fourth stage treatment system 4 is provided with an adsorption-disinfection-sterilization treatment tank 41, and adopts catalyst activated carbon 411 and molecular hypochlorous acid water for sterilization and disinfection, and further removes COD and nitrate nitrogen.

The utility model discloses at the during operation, first-stage treatment, sewage is promoted by the pump is automatic, get into main engine room A indoorly through sewage pipeline D through sewage import B, get into first-stage treatment system 1 after, advance to enter just heavy groove 11 and loop through thick grid 111 and thin grid 112, carry out the filtration of thick and thin grid, then get into indoor flat membrane micro-filtration tank 12, after tentatively removing SS and organic matter, draw forth to the outdoor second grade processing system 2 that gets into of main engine room A again, get into biological nethike embrane biological treatment tank 21 promptly, carry out abundant contact with the biomembrane wherein, the pollutant is adsorbed and is degraded; the effluent from the biological net film biological treatment tank 21 is precipitated by the intermediate tank 5, enters the substrate-microorganism-plant composite ecological tank 31, enters the third-stage treatment system 3, is further separated and removed of organic matters, nitrogen, phosphorus, heavy metals and other components under the combined action of the filler 312, the substrate 311, the plant 313 and the like, enters the fourth-stage treatment system 4, passes through the adsorption-disinfection-sterilization treatment tank 41, is purified, and then is discharged from the water outlet C until the water quality reaches the first-stage A standard, and meanwhile, the sludge discharged from the bottoms of the primary sedimentation tank 11, the flat film microfiltration tank 12, the biological net film biological treatment tank 21, the intermediate tank 5 and the substrate-microorganism-plant composite ecological tank 31 is discharged through the sludge pipeline E.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in fig. 2, in the first stage of treatment, the sewage is collected by the pipe network system and then treated by the coarse grid, and the coarse grid 111 is mainly used for intercepting large floating objects in the sewage so as to ensure the normal operation of subsequent treatment structures and effectively reduce the treatment load, thereby providing guarantee for the long-term normal operation of the system. Then, as shown in fig. 2, the wastewater enters the flat membrane micro-filtration tank 12, the flat membrane micro-filtration tank 12 works by that wastewater containing suspended matters flows into the flat membrane surface of the metal filtration membrane 121, the water permeates downwards through the flat membrane of the metal filtration membrane 121 under the action of gravity, meanwhile, the suspended matters are intercepted by the flat membrane surface of the metal filtration membrane 121, and the cleaning spray head 122 moves along a track along with the walking mechanism 123 above the flat membrane of the metal filtration membrane 121, so that the suspended matter cleaning and the flat membrane cleaning work are realized. The metal filtering membrane 121 intercepts suspended matters for rapid separation, the gravity flow realizes rapid filtering, the suspended matters do not stay, the flat membrane microfiltration realizes the technical characteristics of continuous water inlet and suspended matters direct separation and filtration, and the separation of the suspended matters and water is rapidly realized.

In the second stage of treatment, the biological net membrane biological treatment tank 21 is a novel biological treatment system with a porous support 22 as a reaction medium as a core, as shown in fig. 4, the porous support 22 is adopted to improve the interception chance of suspended solids, and a large surface area is provided as a microorganism adhesion and proliferation medium, so that a large amount of biomembrane microorganisms of a specific group can be accumulated, and the purpose of removing various pollutants including COD, ammonia nitrogen and total nitrogen is facilitated.

In the third stage of treatment, the triple coordination of physics, chemistry and biology of the substrate-microorganism-plant composite ecological tank 31 is utilized, pollutants are removed through the actions of precipitation, filtration, adsorption, ion exchange, plant absorption, microorganism transformation and degradation, precipitation and precipitation, peat accumulation and the like, meanwhile, through the biogeochemical cycle of nutrient substances and water, the plant growth is promoted and the yield is increased, carbon dioxide can be absorbed to release oxygen to regulate regional microclimate, carbon is fixed through plant biomass production, sand dust is blocked, and noise is reduced.

In the fourth stage of treatment, as shown in fig. 7, the substrate-microorganism-plant composite ecological tank 31 is filled with catalytic activated carbon 411, and the catalytic activated carbon 411 is also an adsorbing material, and can adsorb and oxidize organic matters, total nitrogen and the like in the sewage. Then, the treated sewage is discharged after being sterilized and disinfected by spraying molecular weak acidic HOCl water with certain concentration. The molecular faintly acid HOCl water generation technology is to generate HOCl with high concentration and pH value of about 6 faintly acid by an improved medicament mixing technology, compared with bleaching water, the HOCl water does not generate trihalomethane and chlorine, has the oxidation capacity of 20-30 times higher than that of sodium hypochlorite, is faintly acid, high in safety, does not corrode metal, is naturally decomposed without residue, has strong degerming capability and does not generate drug resistance, can accurately control the concentration of residual hypochlorous acid and residual chlorine, and does not cause toxicity to subsequent biological treatment. The catalytic activated carbon 411 is a noble metal-covered porous activated carbon catalyst with the characteristic of adsorption and oxidation, and takes coconut shell activated carbon as a substrate, effective noble metal components are covered, the particle size of the catalytic activated carbon 411 is about 20-40 meshes, and the specific surface area can reach 1000m²(ii) in terms of/g. Used for degrading COD in wastewater: adsorption (10%)/oxidation (90%).

In the foregoing, as shown in fig. 3, in the second stage of treatment, the biological net film biological treatment tank 21 belongs to a hole-dwelling type fixed biological treatment technology, is resistant to water and air scouring, and is suitable for a biological treatment system with slow growth of microorganisms or low load. The top of the biological net film biological treatment tank 21 is a necking opening, a porous supporter 22 is filled in the biological net film biological treatment tank 21, a flowing water inlet 23 is arranged at the opening at the top of the biological net film biological treatment tank 21, a flowing water outlet 24 is arranged at the upper part of the outer wall of the biological net film biological treatment tank 21, and an air inlet 25 is arranged at the outer wall of the bottom of the biological net film biological treatment tank 21. The biological net film biological treatment tank 21 is operated in a floating bed mode, has the characteristics of high efficiency, high stability, simplicity in operation and the like, and is particularly suitable for treating low-load and high-flow operation. The biological net film biological treatment tank 21 is connected in series before the substrate-microorganism-plant composite ecological tank 31, and is used for removing organic matters which are difficult to decompose, ammonia nitrogen, total nitrogen and the like in sewage.

In the above, as shown in fig. 5 and 6, the water surface is below the surface of the filler 312 of the substrate-microorganism-plant composite ecological tank 31, the water flows from the water inlet pipe 314 along the substrate 311 through the water distribution pipe 315 and passes through the filler 312 in a horizontal or vertical penetration manner, the water flows out to the water collection pipe 316 at the lowest position of the water bed, the aquatic plants 313 with good treatment performance and high survival rate, such as reed, are planted on the surface of the bed body, the purified water is collected through the water collection pipe 316, the water flows out through the liquid level controller, and the anti-seepage film is paved at the bottom of the substrate-microorganism-plant composite ecological tank 31, so that the anti-seepage effect can be achieved, and the groundwater pollution by. The sewage flows in the substrate-microorganism-plant composite ecological tank 31, the water level is deep, and the sewage is purified by utilizing the interception effect of a biofilm growing on the surface of the filler, abundant roots of aquatic plants 313, surface soil and the filler 312. Because the water flows below the ground surface, the water-saving sewage treatment device has the characteristics of good heat insulation performance, small influence of climate on treatment effect, better sanitary condition, large hydraulic load and pollution load, good removal effect on pollution indexes such as BOD, COD, SS, heavy metals and the like, stable water quality of effluent, no need of adaptation period, small occupied area and no odor and propagation of mosquitoes and flies.

In the third stage of the treatment, the selection requirements of the filler 312 in the substrate-microorganism-plant composite ecological tank 31 include: should provide good growth environment for aquatic plants 313 and microorganisms, has good water permeability, and has system porosity of less than 0.3 after the filler 312 is installed, and can be selectedThe material 312 includes limestone, slag, vermiculite, zeolite, sand, blast furnace slag, shale, and the like. Zeolite vs. NH is reported₄ ⁺N has a high adsorption function, e.g. using a combination of zeolite and limestone, considering both NH and zeolite₄ ⁺N is used for adsorbing and activating the indissolvable P in the soil and performing the biological regeneration, and the aim of removing N and P is fulfilled by utilizing the high adsorption characteristic of limestone to P.

In the third stage of the treatment, the aquatic plant 313 selection requirement of the substrate-microorganism-plant complex ecological tank 31 comprises: the requirements for the aquatic plant 313 include: a) the root system is developed and the oxygen delivery capacity is strong; b) the method is suitable for local climatic environment, and native plants are preferentially selected; c) the stain resistance is strong, and the decontamination effect is good; d) has the capability of freezing resistance and disease resistance; e) has a certain economic value; f) easy to manage; g) has certain landscape effect.

Of the above, in the third stage of treatment, the main factors of pollutants or environmental influences targeted by the substrate-microorganism-plant complex ecological tank 31 are mainly nitrogen, phosphorus, suspended matters (SS), organic matters (BOD, COD), heavy metals, etc., and the main removal routes for the substrate-microorganism-plant complex ecological tank 31 include:

1) removing suspended matters: and filtering the substrate, settling sludge and attaching root systems to further complete the removal of suspended matters (SS). In order to prevent the blockage near the water inlet of the water inlet pipe 314 of the substrate-microorganism-plant composite ecological tank 31, a pretreatment facility is arranged before water is fed to reduce the total solid concentration, and a precipitation tank is generally arranged as the pretreatment facility.

2) Removing organic matters: the microorganisms form a layer of biological membrane on the surface of soil particles with huge specific surface area, when sewage flows through the surface of the soil particles, insoluble organic matters are intercepted through the precipitation, filtration and adsorption of a matrix and then are utilized by the microorganisms; the soluble organic matter is decomposed and removed through the adsorption and absorption of plant root system biomembrane and the metabolism of microbe. Therefore, the removal of organic matters by the substrate-microorganism-plant composite ecological tank 31 is a result of the combined action of physical interception and precipitation and biological absorption and degradation, and most of organic matters in the sewageThe product is finally converted into microorganism and CO by heterotrophic microorganisms₂Methane and water.

3) Removing nitrogen and phosphorus: the nitrogen in the sewage comprises inorganic nitrogen and organic nitrogen, the inorganic nitrogen comprises ammonia nitrogen, nitrite and nitrate, the organic nitrogen comprises urea, amino acid, purine and pyrimidine, and the removal way comprises the adsorption, filtration, precipitation, volatilization of matrix, plant absorption and microorganism nitrification and denitrification. The phosphorus in the sewage comprises organic phosphorus and inorganic phosphorus, and the removal way mainly comprises microbial assimilation, matrix adsorption, aquatic plant 313 absorption and sludge precipitation, wherein the matrix 311 adsorption and the sludge precipitation are mainly used.

4) And (3) removing heavy metals: the metal ion removal mechanism mainly comprises: the absorption and enrichment of the aquatic plants 313, the adsorption of soil colloid particles, the filtration and precipitation of suspended particles, and the removal of heavy metals in sewage by the substrate-microorganism-plant composite ecological tank 31 are realized by the combined action of the plants, microorganisms, soil substrates and other components. Referring to the artificial wetland design, the main design parameters during the third-stage treatment or the advanced treatment are as follows:

design parameters	Unit of	Composite ecological system
			COD surface load N_COD	g/m²·d	≤16
Hydraulic load N_q	L/m²·d	≤40
			TN surface loading N_TN	g/m²·d	2.5-8
NH₄ ⁺-N surface loads N_NH	g/m²·d	2-5
			TP surface load N_TP	g/m²·d	0.3-0.5
Residence time T	d	≥3
			Slope of groove bottom i	％	≥0.5
Depth h of filling	mm	700-1000

In the embodiment of the utility model, the getting rid of the Suspended Solid (SS) of sewage is mainly accomplished through first-stage treatment thickness grid, flat membrane microfiltration.

The embodiment of the utility model provides an in, the biological sewage treatment system of simulation natural environment is a highly stable system, can adapt to the unexpected undulant of the waste water load of intaking, effectively lasts and steadily eliminates and handle outer drainage smell of gas, guarantees the drainage quality. The simulated natural environment biological sewage treatment system improves the aesthetic experience with a unique design concept, can be placed anywhere, and even comprises the steps of allowing the wastewater to be treated at a place close to the source without influencing the value of the surrounding soil and the ground, thereby obviously reducing the cost of infrastructure. The biological sewage treatment system simulating the natural environment solves the challenge of water resource shortage in a high-efficiency implementation mode, so that the treated water can be recovered nearby a use place, and the regenerated water can be used for multiple purposes, including irrigation, an industrial cooling process, a water supply air-conditioning cooling tower, toilet flushing or underground water supply and the like.

The embodiment of the utility model provides an in, simulation natural environment biological sewage treatment system adopts the process control system based on PC-PLC, has integrateed operation data's collection, demonstration and storage to and operation variable's input and application, through automatic analysis and dynamic change's operation section, no matter be the change of hydraulic flow, the change of the water intake characteristic or the change of weather condition, all can remain stable play water flow. The control and management of the biological sewage treatment system simulating the natural environment depend on data collected by a sensor and a probe installed in the system, the flow of wastewater is measured by an electromagnetic meter and a water level indicator, the optimization of energy consumption is managed by the data of a dissolved oxygen probe connected with a variable speed driver for controlling an air blower, the capacity control of a pump is realized by adjusting a valve through a variable speed drive and an electromagnetic or pneumatic controller, all equipment are controlled by a PLC (programmable logic controller), and the PLC monitors the state of the system through a feedback channel and displays the state in an application program.

The embodiment of the utility model provides an in, in second grade treatment, biological nethike embrane biological treatment groove 21 is suitable for low concentration waste water very much, operates under high hydraulic load, and is strong to the tolerance of environmental variation, and mud solid-liquid separation is simple, and oxygen utilization efficiency is high, and operating cost is low. The porous carrier 22 has an open pore structure, which is helpful for stabilizing the water flow condition. The porous carrier 22 has a maximum specific surface area, and as a medium for adhesion and proliferation of microorganisms, it can accumulate a large amount of biofilm microorganisms, contributing to the removal of various contaminants.

In the embodiment of the present invention, in the third-level treatment, the aquatic plant 313 plays a role in the complex ecosystem: absorbing part of pollutants in the landscape water as nutrients for self growth; heavy metals of certain toxic substances can be enriched, converted and decomposed into non-toxic substances; the growth of the root system is favorable for landscape water to be uniformly distributed on the water passing section of the 313 bed of the aquatic plant, and oxygen is conveyed to the root area to create a good root area environment favorable for the microbial degradation of organic pollutants; increase or stabilize the water permeability of the soil. The aquatic plant 313 includes reed, cattail, calamus, droughhaired bevel herb, canna, allium mongolicum regel, rush, cress, cane shoot, ryegrass, etc. If the effective aquatic plant 313 combination is selected, a good effect on denitrification can be achieved, for example, the reed has a strong oxygen delivery capacity, the water chestnut has a strong nitrogen and phosphorus absorption capacity, and the removal rate of TN and ammonia nitrogen by mixed planting of the two plants respectively reaches 60.6% and 80.9%.

The embodiment of the utility model provides an in, in the third level treatment, matrix-microorganism-the compound ecological groove of plant 31 promotes the growth of plant in sewage purification engineering, increases the afforestation area to can be favorable to biodiversity's protection for animals and plants provide habitat. The presence of the aquatic plants 313 helps to create a loose biofilm structure that allows oxygen to penetrate to the deepest layers of the biofilm fixed to the root structures, and this combination of clean water and loose structure results in a high oxygen transfer rate, thereby reducing aeration requirements, which is the most energy intensive part of any aerobic treatment process. The method realizes the reclamation and harmlessness of the wastewater, can construct different types of matrix-microorganism-plant composite ecological subsystems according to different pollutant types and local natural conditions, simulates the operation mechanism of a natural ecological system, and more effectively carries out various water pollution treatments.

The embodiment of the utility model provides an in, after the biological sewage treatment system actual motion of simulation natural environment, aquatic plant 313 can concentrate after being reaped and collect, be used as biomass energy raw materials alright realize the recycling of imitative biological sewage treatment system, the contradiction problem that the raw materials supply that still probably solves traditional biomass power generation simultaneously contends for the ground with crops. Theoretically, the plant of the biological-like sewage treatment system has a similar heat value with corn straw and the like, has higher cellulose content and lower lignin content, can be utilized through biogas fermentation, a fuel ethanol technology, a biomass solid forming fuel technology and the like, and becomes a biomass energy raw material with more potential.

The embodiment of the utility model provides an in, as the implementation of a preferred, the required indoor place of first processing can adopt villa building form, and friendly and harmonious harmony of surrounding environment is harmonious consistent in the interface, and based on less reactor volume, lower suspension solid and creative architectural design key element combine together organically, its area specific activity mud's design will be little 60%, and the land occupies fewly, and construction cost is low by a wide margin.

Claims

1. A biological sewage treatment system simulating natural environment is characterized by comprising four-stage treatment systems which are sequentially connected through a sewage pipeline (D), wherein a primary sedimentation tank (11) and a flat-film micro-filtration tank (12) are arranged in a first-stage treatment system (1), a coarse grid (111) and a fine grid (112) are arranged in the primary sedimentation tank (11), and a metal filtering membrane (121) is arranged in the flat-film micro-filtration tank (12); a biological net film biological treatment tank (21) is arranged in the second-stage treatment system (2), and a porous supporter (22) is filled in the biological net film biological treatment tank (21); a substrate-microorganism-plant composite ecological tank (31) is arranged in the third-level treatment system (3), a substrate (311) is filled at the front end of the substrate-microorganism-plant composite ecological tank (31), a filler (312) is filled at the main body of the substrate-microorganism-plant composite ecological tank, aquatic plants (313) are arranged at the top of the filler (312), and a water inlet pipe (314) and a water collecting pipe (316) are respectively arranged outside the front end and the rear end of the substrate-microorganism-plant composite ecological tank (31); an adsorption-disinfection-sterilization treatment tank (41) is arranged in the fourth-stage treatment system (4), and the adsorption-disinfection-sterilization treatment tank (41) is filled with catalytic activated carbon (411) and sprayed with molecular weak acidic HOCl water; an intermediate tank (5) is connected between the biological net film biological treatment tank (21) and the substrate-microorganism-plant composite ecological tank (31).

2. The natural environment simulated biological sewage treatment system according to claim 1, wherein the metal filtering membrane (121) is laid on the upper part of the flat membrane micro-filtration tank (12), a cleaning nozzle (122) is installed on the upper part of the flat membrane micro-filtration tank (12), namely the upper side of the metal filtering membrane (121), and the cleaning nozzle (122) is installed on the traveling mechanism (123).

3. The biological sewage treatment system according to claim 1, wherein the catalytic activated carbon (411) is formed by using coconut shell activated carbon as a substrate, a precious metal layer is covered on the surface of the coconut shell activated carbon, the particle size of the catalytic activated carbon (411) is 20-40 meshes, and the specific surface area is not more than 1000m²/g。

4. The natural environment simulated biological sewage treatment system according to claim 1, wherein the top of the biological net film biological treatment tank (21) is a necking opening, the biological net film biological treatment tank (21) is filled with a porous supporter (22), a running water inlet (23) is arranged at the opening at the top of the biological net film biological treatment tank (21), a running water outlet (24) is arranged at the upper part of the outer wall of the biological net film biological treatment tank (21), and an air inlet (25) is arranged at the outer wall of the bottom of the biological net film biological treatment tank (21).

5. The simulated natural environment biological wastewater treatment system of claim 1, wherein the filler (312) is installed such that the system porosity is not less than 0.3.

6. The simulated natural environment biological wastewater treatment system of claim 1, wherein the porous support (22) has an open pore structure with a maximum specific surface area.

7. The simulated natural environment biological wastewater treatment system of claim 1, wherein the primary treatment system (1) is installed in the main housing a room.

8. The natural environment simulated biological sewage treatment system according to claim 1, wherein the bottom of the primary sedimentation tank (11), the flat membrane micro-filtration tank (12), the biological net membrane biological treatment tank (21), the intermediate tank (5) and the substrate-microorganism-plant composite ecological tank (31) is connected with a sludge pipeline E.

9. The simulated natural environment biological sewage treatment system of claim 1, wherein a partition wall is erected between the substrate (311) and the filler (312), and a plurality of water distribution pipes (315) communicated with both sides of the partition wall are uniformly and penetratingly installed on the partition wall.

10. The simulated natural environment biological sewage treatment system of claim 1, wherein the bottom surface of the primary sedimentation tank (11) is higher than the top surface of the flat membrane micro-filtration tank (12), the bottom surface of the flat membrane micro-filtration tank (12) is located at or above the horizontal plane, the top surfaces of the biomembrane biological treatment tank (21), the substrate-microorganism-plant composite ecological tank (31) and the adsorption-disinfection-sterilization treatment tank (41) are respectively higher than or above the horizontal plane by 1M, and the bottom surface is lower than or below the horizontal plane by 1M; the top surface of the middle groove (5) is flush with the horizontal plane or the ground.