WO2007115464A1

WO2007115464A1 - An apparatus for anaerobic treating wastewater

Info

Publication number: WO2007115464A1
Application number: PCT/CN2007/000391
Authority: WO
Inventors: Feng Zhao
Original assignee: Feng Zhao
Priority date: 2006-04-11
Filing date: 2007-02-05
Publication date: 2007-10-18
Also published as: CN2895402Y

Abstract

An apparatus for anaerobic treating wastewater is provided, which comprises a hermetic tank. At least one inlet (9) is disposed on at least one side wall of the tank, and a corresponding outlet (10) is disposed on the side wall opposite to the side wall having the inlet. The height from the outlet (10) to the bottom (3) of the tank is shorter than that from the inlet (9) to the bottom (3) of the tank. At least one overflowing wall (4) is provided on the bottom (3) of the tank to form an overflowing channel between the overflowing wall (4) and the top (1) of the tank. The space of the tank is divided into biological treating areas unattached to one another by the overflowing wall (4). The height from the inlet (9) to the bottom (3) is longer than the height of the overflowing wall (4). And the height from the overflowing wall (4) to the bottom (3) is longer than that from the outlet (10) to the bottom (3). At least one longitudinal partition (5) is disposed in every biological treating area. A flowing channel (13) for wastewater is disposed in the middle of the longitudinal partition (5), and the material supporting biomass is provided on both sides of the longitudinal partition (5).

Description

Wastewater anaerobic treatment device

The invention relates to a sewage anaerobic treatment device.

Background technique

The pollutants in domestic sewage and industrial wastewater are various. It is not expected that the pollutants can be eliminated by only one method. A sewage often needs a treatment system composed of several methods or technologies to achieve treatment. The extent of the request.

According to the degree of treatment, sewage treatment can be divided into primary, secondary and tertiary treatment. The first treatment is to remove the solid pollutants or sediments in the suspended state of the sewage. The primary treated sewage is not suitable for discharge. Compared with the secondary treatment, the primary treatment is pretreatment. The main task of the secondary treatment is to remove the colloidal and dissolved organic pollutants (B0D substances) in the sewage, and the removal rate can reach more than 90%. The various methods of biological treatment can meet this requirement as long as they are in normal operation. Generally speaking, after secondary treatment, the sewage has already met the standards for discharging water.

The primary and secondary treatment methods are often used in urban sewage. The third-stage treatment, which is also called the conventional treatment method, is to further remove the pollutants that have not been removed by the secondary treatment. It is a deep treatment, which is based on sewage recovery and sewage reuse. Purpose.

Sludge is a by-product of sewage treatment and an inevitable product. If the sludge is not properly disposed, it will cause secondary pollution.

From the situation of domestic sewage, the primary treatment forms include septic tanks, primary sedimentation tanks, regulating tanks, etc. For domestic sewage of washing and shower type, there are few organic components, which can be treated by physical method, that is, primary precipitation. Pools, etc. For domestic sewage containing organic components such as manure, it is treated by biological methods, which is commonly referred to as septic tanks. The secondary treatment of domestic sewage can be carried out in a variety of processes, and can be treated with aerobic treatment or anaerobic treatment. Since the aerobic treatment process is high in efficiency and mature in technology, more secondary treatment processes are selected for aerobic treatment. In real life, in most cases, manure and sewage are confluent, especially in underdeveloped areas, so septic tanks are widely used. In general, primary treatment (septic tanks) can be dispersed according to the distribution of living areas. The domestic sewage treated by the septic tank does not meet the requirements of the discharged water body, so it needs to be discharged into the urban pipe network and concentrated in the secondary treatment system (sewage treatment plant). Step processing. Due to the complexity of the urban pipe network, the long distance between the pipelines and the rapid expansion of the city, the condition of the pipe network is difficult to adapt to the development of the city. Once the pipes of certain diameters are buried underground, the change is difficult, so the sewage treated in the secondary treatment The design of the treatment plant needs to be considered in terms of scale, geographical environment, characteristics along the line, operation and maintenance, etc. It has caused many sewage treatment systems to achieve the desired application effect and purpose.

The operation and maintenance of the sewage treatment plant is a professional work and a high investment. For the underdeveloped areas, only the first-level treatment facilities such as septic tanks cannot guarantee environmental protection and meet the discharge of sewage. Requirements. The construction, operation, and maintenance of a secondary treatment facility such as a wastewater treatment plant is another complex system work. Therefore, it is an effective and effective way to solve the problem of domestic sewage prevention by seeking a simple and practical domestic sewage treatment technology that can integrate the functions and requirements of primary treatment and secondary treatment of domestic sewage into one system.

There is a need for a simple, economical, and practical anaerobic treatment that combines the primary and secondary treatment functions of domestic wastewater.

The technique of anaerobic treatment is chosen because anaerobic treatment is more suitable for sewage treatment with high organic matter load and the ability to treat sludge, and is suitable for establishing processes that satisfy primary treatment and secondary treatment.

The background of anaerobic treatment can be further understood from the development of anaerobic treatment:

Anaerobic biological treatment technology is an artificial control and enhancement of microbial processes that are ubiquitous in nature. It is an effective means to deal with organic pollution and wastewater. However, due to insufficient research and understanding of microorganisms involved in this process, the technology is The development in the past 100 years is slow, mainly because of: (1) Anaerobic biological treatment technology is a multi-bacterial group, multi-level anaerobic fermentation process, with many populations, complex relationships, difficult to figure out; (2) some The populations are mutually symbiotic, and it is difficult to isolate and identify them. (3) The technique of culturing and separating bacteria under anaerobic conditions is complicated; (4) Because aerobic treatment is efficient under the same conditions, the application is high. Extensive, becoming the mainstream of biological treatment, weakening the attention and research in anaerobic treatment.

The development of anaerobic treatment has gone through three stages:

The first stage (1860 - 1899): the initial stage of development in which a single sediment is combined with an anaerobic fermentation pool. This stage of development has the following characteristics: (1) Concentrating sewage sedimentation and sludge fermentation in a septic tank (commonly known as septic tank), that is, based on a simple sedimentation tank, and appropriately storing the sludge storage volume as a volatile suspended organism A place where solids are liquefied.

(2) The treatment target is sewage and sludge.

(3) Accurately designed and constructed septic tanks are still used today in drainless pipe network areas and on drain lines for some large residential or public buildings.

The second stage (1899-1906): the development stage of stratification and anaerobic fermentation. This stage of development has the following characteristics:

(1) In the treatment structure, the sewage separator and the sludge fermentation are separated by a transverse partition; the upper and lower chambers are separately carried out, thereby forming a so-called double-layer sedimentation tank.

(twostorytank).

(2) The pollution indicators at that time were still mainly suspended solids, but the energy function of biogas was recognized and started to be exploited.

The third stage (1906-2001): the advanced stage of development of independent construction. This stage of development has the following characteristics:

(1) Separating the anaerobic fermentation chamber in the sedimentation tank to form an independent working anaerobic digestion reactor. The main treatment facilities developed during this phase are common anaerobic digestion tanks and UASB, anaerobic contact processes, two-phase anaerobic digestion processes, AF, AFB, etc.

(2) Combining the treatment of organic wastewater with organic sludge and the utilization of biogas, that is, the combination of environmental protection and energy development, the comprehensive utilization of biogas residue is also mentioned as an important task on the agenda.

(3) In addition to VSS, the treatment targets also focus on the reduction of B0D and COD and the degradation of certain organic poisons. ,

The reactor body of anaerobic biological treatment technology has also experienced three eras.

1. The first generation of reactors..., anaerobic biological treatment technology has been around for more than 100 years. In 1860, French engineer Motuas used an anaerobic method to treat precipitated solids in wastewater. In 1896, the first anaerobic digester for the treatment of domestic sewage appeared in the United Kingdom. The biogas produced was used for lighting. In 1904, Imhof f in Germany developed it into the Inihof f double-layer sedimentation tank (ie, the septic tank). Still in effective use. In 1914, 14 cities in the United States established anaerobic digesters. To the 1940s, Australia Efficient, warmable and continuously stirred digesters have emerged with improved processing efficiency.

Schroepfer developed an anaerobic contact reactor in the 1950s to further increase processing efficiency and load. These reactors can be referred to as the initial anaerobic reactor and are primarily used for the treatment of domestic sewage.

The slow growth of anaerobic microorganisms, long generations, and long enough residence time are key conditions for the success of anaerobic processes. It is clear that the anaerobic digester cannot separate the water residence time and sludge residence time, which is one of the reasons why the sludge digester must maintain a sufficiently long residence time. General digestion process Xin Wen temperature (30 - 35 ° C) residence time is 20-30d.

2. Second generation reactor

One of the conditions that must be met by a highly efficient anaerobic treatment system is: Ability to maintain a large amount of active anaesthesia

*sludge. In accordance with this principle, a second generation anaerobic reactor has been successfully developed. A unique feature of these reactors is the ability to separate the solids residence time from the residence time of the water stream, which can last up to several hundred days. This shortens the residence time of anaerobic treatment of high-concentration wastewater from a few days or tens of days to a few hours or several days. In the late 1960s, Anaerobic Filter (AF), an Anaerobic Fluidized Bed (AFB) reactor, was developed to increase the concentration of anaerobic microorganisms and residence time, and to shorten the liquid residence time. , Up-flow Anaer-obic Sludge Bed (UASB), etc. .

3. The third generation reactor,

The second condition that a highly efficient anaerobic treatment system needs to meet is to make good contact between the incoming and maintained sludge. To this end, one should first ensure the uniformity of the water in the reactor, as this will minimize the short-flow. This issue undoubtedly involves the design of the water distribution system. At the same time, a high reactor design or a high reflux strength can be obtained by using a effluent reflux. On the other hand, anaerobic reactor mixing can be derived from both the mixing of the influent and the perturbation of the gas. However, when the influent water cannot use high hydraulic and organic loads, for example, when the process has to be used at low temperatures, the mixing intensity in the sludge bed is too low to offset the short-flow effect. The application of the UASB reactor is limited. It is this research on this issue that led to the development and application of third-generation anaerobic reactors. At present, there are many researches: Expanded Granular Sludge Bed (EGSB), Inside Cycling (IC), Anaerobic Upflow Fluidized Bed (Up- Flow Bed, abbreviated as UFB), Anaerobic Membrane Biosystem (AMBS classification "multiphase", anaerobic reactor (Stage Multi-Phase Anaerobic, SMPA) and its treatment system, etc., most of which are still under development Stage, no production scale.

Regardless of the type of reactor used, practice has shown that a good anaerobic reactor should meet at least the following requirements:

(1) Good sludge retention capacity to ensure sufficient biomass in the reactor;

(2) The conditions of sufficient contact between the biological sludge and the influent substrate to fully exert the ability of the microorganism to degrade the organic matter;

(3) It has the function of providing suitable growth environment conditions for microorganisms, so that different populations of anaerobic microorganisms function and operate stably under optimal environmental conditions. To this end, measures to improve the treatment effect and maintain the stability of the reactor must be analyzed according to the pathway of anaerobic degradation of organic matter, reaction kinetics and mixed flow state of the reactor, and combined with the process design of the reactor to comprehensively improve the reaction. Performance.

In order to meet a good anaerobic treatment reactor, it is necessary to have the above basic requirements. Many anaerobic treatment reactors use power measures to improve work efficiency from the aspects of sewage transportation, agitation and temperature rise. The application of power measures It has an impact on the operating costs and maintenance aspects of the process.

From the above technical development process of anaerobic treatment of sewage, we can see that in the field of domestic sewage treatment, the more common facilities are mainly septic tanks, because septic tanks are easy to use, but septic tank technology Relatively backward. Other efficient anaerobic treatment processes are not widely used for a variety of reasons.

With the increasing demand for environmental protection, the contradiction with the development of urbanization is more prominent. Domestic sewage is an inevitable product in the human living environment, affecting the environment and water resources all the time. If the pollution of industrial sewage can be prevented and treated by management and control, it can be solved by certain means, but the pollution of domestic sewage is characterized by dispersion, wide geographical area, many discharge points, pipe network restrictions, economic conditions, etc. factor. Therefore, designing a first-stage treatment that can strengthen and replace domestic sewage, has a practical application of general application, and a treatment process that is close to or achieves the effect of secondary treatment is an effective way to solve the treatment of domestic sewage. Another development direction of anaerobic treatment should be based on a process close to the application, seeking to improve work efficiency, environmental protection, resource utilization and other incidental work capabilities. Domestic sewage treatment facilities that meet such needs need to have a simple and common mode similar to septic tanks in the construction, operation, maintenance and management of facilities, and also need to meet the necessary process conditions and effects of having a good anaerobic treatment facility.

Invention disclosure

It is an object of the present invention to provide an anaerobic digestion treatment apparatus for sewage.

The sewage treatment device provided by the present invention comprises a closed pool body; at least one water inlet is provided on at least one side wall of the pool body, and the opposite side wall provided with the water inlet side wall is provided Corresponding water outlet, the height of the water outlet from the bottom wall is lower than the height of the water inlet from the bottom wall;

At least one overflow partition wall is disposed on the bottom wall of the pool body, and an overflow passage is formed between the overflow partition wall and the top wall of the pool body, and the cavity of the pool body is divided into water bodies and relatively independent. Biological treatment area;

The height of the bottom of the water inlet pipe from the bottom wall is higher than the height of the bottom wall, and the height of the overflow wall from the bottom wall is higher than the height of the water outlet from the bottom wall;

Each of the biological treatment regions is provided with at least one longitudinal through-body partition, and each of the biological treatment areas is divided into a plurality of biological body units of water bodies, wherein each of the longitudinal through-body partitions is provided with sewage flowing through Overcurrent channel

The height of the upper edge of the overflow passage from the bottom wall is lower than the height of the bottom of the water outlet pipe from the bottom wall;

Biocarrier fillers are provided on both sides of each of the longitudinal via separators to form a biocarrier filler region.

In the sewage treatment apparatus, each of the divided water body units has a bio-carrier filler unit region, and the bio-carrier filler region is composed of a plurality of filler units; the filler units are arranged in a matrix. The biocarrier filler region covers the flow passage and the flow cross section. The biocarrier filler is intimately attached to the longitudinal via separator.

The total length of the biocarrier filler region along the water flow direction is at least 50% of the length of the cavity of the sewage treatment device along the water flow direction, that is, the length of the space of the biocarrier filler region distribution treatment pool in the horizontal direction of the treatment tank is greater than The length of the water body is more than 50%.

The water body between the biocarrier filler region and the overflow partition forms a digestive fluid buffer. The void between the biocarrier filler region and the bottom wall of the cell body forms a sinking zone. The sedimentation zone gradually decreases with the progress of sewage treatment.

In order to connect the pool body, in the sewage treatment device, the upper portion of each of the longitudinal through-hole partitions is provided with at least one vent hole, and each of the vent holes is positioned lower than the top wall of the pool body and higher than the water surface.

In order to meet the maintenance requirements, in the sewage treatment device, at least one cleaning inspection port is respectively disposed on the top walls of each of the overflow partition walls; or directly above each of the overflow partition walls The top wall is provided with a cleaning inspection port; each unit water body is provided with at least one cleaning inspection port above the water body between the packing area and the packing area and the top wall above the water body between the packing area and the wall.

In the above sewage treatment device, the water inlet is connected to an inlet pipe, and the water outlet is connected to an outlet pipe.

In order to facilitate the discharge or collection of gas, the upper portion of the cell body is provided with a vent hole for discharging or collecting gas. The exhaust hole is connected to an exhaust pipe.

DRAWINGS

Figure 1 is a horizontal schematic view of a sewage treatment tank provided with two longitudinal through-hole partitions.

Figure 2 is a view of the A-A of Figure 1.

Figure 3 is a B-B view of Figure 1.

Figure 4 is an A-A view of a sewage treatment tank with four longitudinal through-hole partitions.

The best way to implement the invention

The sewage treatment device of the invention is a series of ecological anaerobic treatment device for a non-powered advection unit of domestic sewage. In a horizontally-disposed sewage treatment tank, one end of the treatment tank is an inlet, which is connected to the inlet pipe of the sewage, and the other end is an outlet, which is connected to the outlet pipe of the sewage pipe. The cell body is divided into a plurality of unit water bodies in series, and the bio-carrier filler is arranged in the unit water body, and the system groups the plurality of group cell carrier units formed by the three-dimensional bio-carrier filler in the pool body, in the process of the sewage passing through the packing unit, The surface of the carrier filler forms a biofilm and a biological flora, and the sewage is digested; the biological carrier filler is distributed in a large amount in the pool space, accounting for more than 50% of the effective water volume; and as the sewage is pushed and translated, the sewage flows through a series of series. The flora unit, different unit body sets different dominant bacteria groups, and different organic pollutants in the sewage are fully contacted and digested under the action of different biological groups. The sewage treatment device can be rooted According to the scale of the treated sewage, water quality requirements and other factors to determine different specifications; for the large scale of sewage treatment, multiple monomer treatment tanks can be used in parallel. The methods in the following examples are conventional methods unless otherwise specified.

Embodiment 1. A sewage treatment tank provided with two or four longitudinal through-hole partitions (overflow partitions) is only provided with a sewage treatment tank having only one overflow partition wall, two or four longitudinal through-hole partitions As an example, the sewage treatment tank of the present invention will be explained. In practical applications, according to the specific requirements of sewage treatment, a plurality of longitudinal through-hole partitions and corresponding unit bacterial carrier packing areas may be added in the chamber of the sewage treatment tank to improve the treatment scale and effect of the sewage.

In the sewage treatment tank of the present invention, the water body enters from the water inlet, and under the action of the liquid level difference, the flow operation is carried out, and the overflow partition wall is arranged in the middle of the pool body to divide the water body into two relatively independent units, the front unit The water body overflows into the rear unit water body, and the water space on both sides of the overflow partition wall is the digestive liquid buffer area; in order to increase the microbial load and the contact condition, a large amount of the biological carrier filler is stereoscopically disposed in the water flow process before and after the two parts of the pool body. The filler has a layered continuous distribution. In order to ensure reasonable guiding of the water flow and to achieve full contact and peaceful flow implementation, a longitudinal through-body partition is arranged in the filling zone, and the middle of the longitudinal through-body partition is an overflow passage, which can guide the water flow operation. Among them, the overflow partition wall separates the water body of the treatment tank into two relatively independent water bodies, which can effectively eliminate and weaken the influence of pH on the biological treatment, and can also guide the overflow of the water flow. The middle of the longitudinal through-body partition is a flow passage that acts to direct the flow of water, while the upper half of the longitudinal through-body partition traps the suspended matter and the lower half is capable of separating the sediment. A large number of three-dimensional elastic fillers are disposed on both sides of the longitudinal through-body separator, and the filler is three-dimensionally filled in the flow cross section of the water flow, and is hierarchically distributed. The sewage is diffused and pushed under the action of its own pressure. After the biofilm is formed, the carrier filler parasitizes a large number of microbial flora. According to the structural characteristics of the carrier filler, the biological flora is densely distributed on the filler to form a layer. The changes in water quality environment and nutrients form different dominant flora, which is fully contacted with wastewater during the treatment process. One end of the sewage treatment tank is the water inlet end, and the other end is the water outlet end, and the water inlet and the water outlet are respectively provided, and the water inlet and the water outlet can enter or discharge from different directions as needed. The digestive juice of sewage has a buffering effect, which can adjust the pH and play a role in environmental transition. Below the pool body and below the packing is a sinking mud area, and a clearing inspection port is provided on the top wall of the pool body. A vent pipe is exhausted or methane gas is collected at the upper portion of the cell body. If the air vent is provided in the upper part of the longitudinal bulk baffle, the gas can be collected or discharged intensively. If the air vent is closed, it can be collected separately. Or discharge gas. The anaerobic treatment system established by the technical scheme forms a small ecological system. According to different domestic sewage treatment requirements, the series packing unit body can be increased, the sewage treatment process and the flora load can be prolonged to improve the treatment capacity.

As shown in Figures 1, 2 and 3, there are three water inlets on the side wall 2 of a horizontal horizontal anaerobic sewage treatment tank, each inlet having an inlet pipe 9 connected thereto; The opposite side walls 2 of the side wall 2 are provided with corresponding three water outlets, and each water outlet is connected with an outlet pipe 10; the height of the water outlet from the bottom wall 3 is lower than the height of the water outlet from the bottom wall 3. Water can enter or exit from three directions as needed. The overflow partition wall 4 divides the cavity of the pool body into two large unit areas, which can be respectively used as the acidic hydrolysis unit area and the methanogen digestion unit area; the overflow partition wall 4 and the top wall 1 of the pool body form an overflow circulation Road. The height of the overflow partition wall 4 from the bottom wall 3 is higher than the height of the water outlet from the bottom wall 3, and the height of the overflow partition wall 4 from the bottom wall 3 is lower than the height of the water inlet from the bottom wall 3. The two large unit areas are respectively divided into two series sub-unit areas by a longitudinal through-body partition 5 having a flow passage 13 in the middle, and the longitudinal through-body partition 5 is divided into an upper section and a lower section by the overflow passage 13 . The upper section of the longitudinal through-body partition 5 is fixed to the top wall 1 and the side wall 2, and the lower section of the longitudinal through-body partition 5 is fixed to the bottom wall 3 and the side wall 2. The lower section of the longitudinal through-body partition 5 blocks the sedimentation sludge and the upper section intercepts the suspended solids. The height of the upper edge of the flow passage 13 from the bottom wall 3 is lower than the height of the overflow partition wall 4 from the bottom wall 3, so that when the sewage treatment is performed, the overflow passage 13 is located in the middle of the sewage cross section, and the flow passage 13 The upper edge is below the water surface. A biocarrier filler is formed three-dimensionally on each side of each of the longitudinal via partitions 5 to form a biocarrier filler region 7. The surface of the bio-carrier filler can form a biofilm to form a three-dimensional biota of the unit. The three-dimensional biota is composed of dominant bacteria and other bacteria, and can adapt to the processing requirements of complex ecosystems. A space is maintained between the overflow partition 4 and the biocarrier packing area 7 as a buffer zone 6. The buffer zone 6 can create a water condition for environmental transition by means of the buffering action of the digestive juice. The gap between the biocarrier filler region 7 and the bottom wall 3 of the cell body forms a sinking zone. In the different sections of the top wall 1 of the pool body, the inspection clearing port 8 is provided to ensure the maintenance; the upper part of the pool body is provided with a venting hole, and the venting hole is connected with an exhaust pipe 11 capable of discharging or collecting gas; The upper portion of the longitudinal body partition plate 5 is provided with a vent hole 12 for communicating with the cell body, and each of the vent holes 12 is located at the top wall 1· of the upper portion of the cell body.

Figure 4 is a process of increasing the processing unit in series according to the work of the digestion process, and prolonging the process. As shown in the figure, during the anaerobic treatment, the longitudinal through-body partition 5 is further divided to further partition the water body to form more unit water bodies, which can be on both sides of the longitudinal through-body partition 5 By setting up more filler cell flora, the treatment process is extended, and the treatment efficiency can be improved accordingly. The water space between the two unit flora can separate the unit flora and also provide a clear inspection space.

The above sewage treatment tanks can be constructed in the form of reinforced concrete or brick-concrete structures, designed and constructed in accordance with relevant building technical standards. It can also be made of composite materials or reinforced plastics, and is implemented according to the technical standards of the corresponding materials.

Example 2. Treatment of sewage by using a sewage treatment tank provided with two longitudinal through-body separators and four groups of packing units

1. A sewage treatment tank with two longitudinal bulk partitions containing four sets of packing units

The structure of the sewage treatment tank is the same as that shown in Figs. 1, 2, and 3 in the first embodiment. In general, this form of design is used as a small processing facility, more for the treatment of residential sewage, the size of the treatment tank according to the requirements of the scale of sewage treatment, water quality (whether it is fecal confluence or diversion) The effective volume is determined by various factors such as the water supply requirements and the sewage retention time. The size of the monomer treatment tank ranges from an effective volume of several cubic meters to an effective volume of more than one hundred cubic meters. The sewage treatment tank of the present invention is in the form of a buried arrangement. According to the specific situation, the top wall of the pool body may be level with the ground, or a certain soil layer may be covered on the top wall. The parameters of the structure and specifications of the processing pool will be adjusted as some requirements change. The following is an example of a treatment tank with an effective volume of 25 cubic meters of concrete treatment tank.

The specific parameters are as follows:

The treatment tank is buried in the ground. The effective volume of the treatment tank is 25 m ³ , and the elevation of the inlet pipe of the treatment tank is determined according to the elevation of the inlet pipe of the sewage pipe network. The length of the treatment tank is 7.25 M, wherein the wall (side wall 2) The wall thickness of the top wall 1 and the bottom wall 3), the longitudinal bulk partition 5, and the overflow partition wall 4 are both 200, and the clearance length in the pool body is 6.2 m, and the longitudinal through-body partition 5 and the overflow partition wall 4 are pooled. The body is divided into four water bodies, wherein the effective length of the first water body at the inlet end is 2. 5 m, and the effective length of the other three water bodies is 1. 25 in; the width of the treatment pool is 2. 0 ra, height According to the specific burial depth, the height of the effective water depth or the overflow partition wall 4 is 2.0 m; the height of the bottom of the water inlet from the bottom wall 3 is higher than that of the overflow partition wall 4, and the overflow partition wall The upper edge of 4 is 50 mm above the bottom of the water outlet _; the middle of the longitudinal longitudinal partition 5 is a flow passage 13 which is located in the middle of the flow cross section of the water body, and the clearance height of the flow passage 13 is 500-700 mm ; each side of the longitudinal body partition 5 is provided with a three-dimensional bio-carrier filler, and the bio-filling zone 7 of each unit is rectangular s, the width of the first unit is 1. 0. 8 m, the width is 2. 0 m, the effective height is 1. 8 m. The m. 5之间。 The vertical distance between the overflow wall 4 and the side of the two bio-filled areas 7 is 0. 45-0. 65m.

The filler filled in the bio-carrier filler region is made of a general-purpose three-dimensional filler, including a three-dimensional elastic filler or a modified three-dimensional elastic filler. Among them, the ordinary three-dimensional elastic filler is economical, and the three-dimensional elastic structure is suitable for matrix stereo arrangement and shearing. Cut sewage, so it is preferred to use suspended stereoscopic single filler. The three-dimensional elastic filler is a series of elastic plastic wire membranes which are connected in series with a central rope. The center rope can be tied and fixed on the filler grid. The diameter of the elastic filament membrane of the relatively three-dimensional elastic filler is mainly 10cm and 15cm. And other different specifications. In the present invention, the two ends of the center rope of the three-dimensional elastic filler are respectively tied and fixed on the filler grid. According to the cube size of the required filler zone, the three-dimensional filler is arranged in a longitudinal and lateral juxtaposed matrix and bound to the grid to form Filled cube area. The grid support is suspended at corresponding positions on both sides of the longitudinal through-body partition 5. Stereoelastic fillers are versatile materials and are produced in most filler manufacturing companies.

Second, the treatment of sewage

1. The sewage treatment tank of the present invention is used for the treatment of sewage contaminated by high-load organic matter, especially domestic sewage. The specifications of the facility are generally determined based on the scale of the treatment of the sewage, the quality of the raw water, and the requirements for the effluent.

2. The treatment tank is operated under a natural working condition and is naturally connected with the sewage pipe network; the water inlet of the treatment tank is connected to the pipe in the direction of the sewage pipe network, and the outlet of the water outlet is connected to the discharge direction of the sewage pipe. The same amount of untreated sewage enters the treatment tank at the inlet, and under the action of hydraulic power, the same amount of treated water after a series of anaerobic treatment is discharged at the water outlet.

3. Take a treatment tank with four water unit as an example. Each water body has a bio-carrier packing unit. When the sewage enters the treatment tank, under the natural action of hydraulic power, the sewage of the first water unit is pushed into the second water unit, and so on, the sewage of the second unit enters the third unit, and the sewage of the third unit enters the fourth unit. The water in the fourth unit is treated water through a series of digestion treatments, and is discharged from the water outlet.

4. In the process of successively flowing through each water body, the sewage passes through each biological carrier packing unit in turn under the guidance of the water flow. The surface of the biocarrier filler can form a biofilm to form a biological fungus Group, digesting the treated sewage. Different packing units, due to changes in water quality nutrients and environmental conditions, have different dominant flora, which can digest different organic substances separately.

5. The treatment object of this treatment pool is mainly the treatment of domestic sewage. The domestic sewage is composed of a variety of complex organic materials, especially domestic sewage containing living manure. The sewage itself carries various biological strains, and the bacteria are in A new dominant flora will be formed during the process of digesting sewage. In the design of the treatment, the surface of the biological carrier filler forms a biofilm enriched with the biological flora, and the formation of the biofilm can be formed by natural formation and artificial assisted formation.

Naturally formed biofilms naturally form biofilms and dominant flora during normal work. Domestic sewage itself has the bacteria and nutrients needed for cultivating and acclimating the flora. In the treatment system of the treatment tank, it has the conditions for forming a biofilm biofilm, so under normal working conditions, Self-generating biofilms and dominant flora. The so-called dominant flora generally refers to the flora with specific processing ability. The dominant flora is formed for specific nutrient substrates and environmental conditions, and is the result of long-term domestication and adaptation. In the sewage treatment apparatus of the present invention, a plurality of sets of water unit or packing unit are connected in series, and the water quality condition gradually changes in different units due to biological action. The dominant flora is the long-term adaptation and domestication of a large number of microbial flora, which gradually form an enzyme system with the characteristics of specific water quality metabolism, which has certain advantages and specificity.

Relatively speaking, the natural biofilm process is relatively long, so it is also possible to take artificially assisted measures, artificially assisted, and from the perspective of environmental conditions, artificial control of pH can be taken, especially in the latter part of the treatment tank. The control of the weakly alkaline environment is achieved by adding alkaline materials. From the perspective of strain-assisted, it is possible to inoculate obligate strains such as the genus Artemis, the genus Ampicococcus, and the genus Arthritis. Manually assisted methods can improve the quality of biofilms and shorten the process.

6. In the implementation of the treatment tank, the appropriate sewage retention time can be determined according to the raw water quality of the sewage, the amount of treated water, the effective volume of the treatment tank, and the requirements of the water treatment degree. According to the situation that the sewage treatment object of the treatment tank is domestic sewage, the domestic sewage has periodic discharge characteristics, so the residence time of the sewage can be set at different times such as 6 hours, 8 hours, 12 hours, 24 hours, etc. Different sewage retention time has different results for sewage treatment scale and effluent water quality, and adapt to different work requirements.

7. In the design of the treatment tank, a relatively independent acid-base water body is naturally formed by the water body separation function of the overflow partition wall and the buffering capacity of the digestive juice biochemical reaction. 8. Under normal circumstances, the main technical indicators before and after treatment of manure-containing sewage (due to the difference in water quality results under different working conditions, the following are reference values). The situation is shown in Table 1 - Table 1 Main technical indicators before and after treatment with sewage

9. In the treatment system, on the one hand, the organic sewage is digested and sludge is formed, and on the other hand, since the system is in an anaerobic digestion state, the sludge is digested and decomposed. In the treatment system, since the amount of the carrier filler is large, the surface area of the biofilm formed is large, so that the material exchange with the external water body after the decomposition of the aged biofilm is facilitated, and the sludge digestion effect is relatively good, so the amount of excess sludge generated is relatively Said less.

Industrial application

1. Simplify the application threshold; in all kinds of sewage treatment processes, most of the treatment processes require additional human-assisted measures, which generate power and energy consumption costs to a certain extent, and the technical requirements of the process are also high. Moreover, the higher the degree of sewage treatment, the higher the conditions for process implementation. Therefore, the use of natural factors, simplifying the process conditions and realizing the practicality of the application is a new direction in the research of sewage treatment technology.

The pollution of domestic sewage is the most basic and common form of water pollution, and the more it is in economically underdeveloped areas with poor infrastructure, the more serious such pollution. Complex sewage treatment technology restricts the implementation of technology. Therefore, in the process of sewage prevention and control, it is impossible to emphasize one step in place, and it should be gradually improved step by step, and the process technology that is convenient to implement should be sought according to local conditions. The invention utilizes natural conditions to realize sewage treatment.

The two ends of the sewage treatment tank are connected to the sewage pipe network, and the treatment process is carried out horizontally, and the sewage flowing through the treatment tank can be digested, no auxiliary measures are needed, and under natural conditions, the hydraulic action formed by the liquid level difference of the water body is operated. The treatment tank can be adapted to local conditions. According to different treatment scales and treatment requirements, the treatment tanks with corresponding treatment capacity and specifications are set in the corresponding suitable geographical locations; the treatment pool adopts construction technology that conforms to the building code, and is easy to popularize and master the application.

2. Create conditions for achieving efficient processing capabilities, thereby improving the ability of the processing pool to work under natural unpowered conditions; (1) Good sludge interception capacity to ensure sufficient biomass in the reactor; in the treatment tank of the present invention, in addition to microorganisms normally present in the water body, a biological carrier filler zone is provided in each water body unit, and the filler is flooded. In most areas of the water unit, the surface of the packing forms a biofilm of the biological flora. In the process of flowing through the treatment tank, the sewage needs to pass through the bacterial packing area of each water body in turn, and is adsorbed and digested by the microorganisms. The bacterial packing area distributes the entire water cross section and enriches the microorganisms, so the process can achieve good sludge interception capacity and sufficient biomass.

(2) The conditions of sufficient contact between the biological sludge and the influent substrate to fully exert the ability of the microorganism to degrade the organic matter; in the treatment tank, a plurality of sets of biocarrier packing units are sequentially arranged along the water flow direction, and the packing is arranged in the entire flow overcurrent The section is an inevitable process of sewage flow. The structure of the filler is a three-dimensional silk film composition, which can fully shear contact with the water body, so the biofilm can exert the ability to degrade organic matter.

(3) It has the function of providing suitable growth environment conditions for microorganisms, so that different populations of anaerobic microorganisms can function and operate stably under optimal environmental conditions. In the treatment system, the water body of the treatment tank is divided into a plurality of unit water bodies, and the unit water body is provided with a bio-carrier filler unit body, so that the treatment system forms a series of biological group units in series. The anaerobic treatment process of sewage is a complex process, the diversity of organic components of sewage, the diversity of biological species involved, the coexistence of multiple biological treatment chains, and the co-production of biological flora. The biochemical reaction products of the previous stage often become the nutrients of the latter biochemical reaction. With the change of the nutrient substrate, the biological flora gradually forms the dominant flora adapted to the environmental conditions at this stage. In the treatment tank, biological carrier fillers are separately set at different stages of the water body, and different water unit units form different flora units, thereby providing the microorganisms with suitable growth environment conditions for adapting to different stages, so that different bacteria groups are at the most It functions in an excellent environment, and the bacteria can be stably operated due to the separation and buffering of water bodies.

In the process of anaerobic treatment, the pH of the water body changes correspondingly with the product of the biochemical reaction. In the early stage of anaerobic treatment, the participating bacteria are mainly heterotrophic decomposing bacteria and acid-producing bacteria. The final product of biochemical reaction contains organic acids such as butyric acid, propionic acid, acetic acid and formic acid, so the water body is acidic. In order to eliminate the influence of acidic water on the environmental impact of methanogen in the alkaline stage of anaerobic treatment, the treatment tank is provided with an overflow partition wall in the middle of the tank body, and the water body of the treatment tank is divided into two independent water bodies to avoid the water body. Direct mixing, buffering the pH by means of the buffering capacity of the biochemical reaction of the digestive juice. Thereby creating a benign water environment for the hyperthyroid flora. Through the design of the process, the treatment pool has the conditions for improving work efficiency, thereby overcoming and solving the problem of low work efficiency under natural unpowered and energy-free conditions, and relatively efficient work.

3. Reduce the output of excess sludge and reduce maintenance costs. In the process of sewage treatment, decomposition and synthesis are carried out simultaneously, and both decomposition and synthesis can play the role of digesting organic matter. When the sludge is synthesized, it is also decomposed and digested. If the sludge is not fully digested in time, it will accumulate. Therefore, the formation of benign sludge metabolites and water exchange conditions can promote the full digestion of sludge. In the conventional conventional process, the exchange of sludge metabolites and water bodies is improved by increasing the mixing and agitation ability of the sludge. In this treatment tank system, a large amount of biocarrier filler is provided to form a large proportion of the biofilm surface area, thereby also increasing the specific surface area of the sludge metabolite exchange. The sludge is sufficiently metabolized to produce less excess sludge, and the cost of maintenance of the cleaning is relatively low.

4. Created conditions for energy use. The final product of the anaerobic treatment is methane gas, which is a renewable energy source. The treatment tank is provided with an exhaust pipe at the upper part of the tank body to discharge gas or collect and further utilize methane gas.

5. It is suitable to establish different types of treatment systems, which can adapt to local conditions, adapt to the complex and dispersed conditions of urban pipe network, and can be used for the partition solution of urban domestic sewage treatment. The treatment tank is located underground to reduce the impact on the ground environment.

Claims

Rights request

A sewage treatment device comprising a closed cell body; at least one water inlet is provided on at least one side wall of the cell body, and the opposite side wall provided with the water inlet side wall is provided Corresponding water outlet, the height of the water outlet from the bottom wall is lower than the height of the water inlet from the bottom wall;

At least one overflow partition wall is disposed on the bottom wall of the pool body, and an overflow passage is formed between the overflow partition wall and the top wall of the pool body, and the cavity of the pool body is divided into water bodies. Independent biological treatment area;

The height of the water inlet from the bottom wall is higher than the height of the overflow partition wall from the bottom wall, and the height of the overflow partition wall from the bottom wall is higher than the height of the water outlet from the bottom The height of the wall;

Each of the biological treatment regions is provided with at least one longitudinal through-body partition, and each of the biological treatment areas is divided into a plurality of water body units, and each of the longitudinal through-body partitions is provided with an overflow passage for the sewage to flow through ;

2. The sewage treatment apparatus according to claim 1, wherein: the bio-carrier filler region is composed of a plurality of filler units; and the filler units are arranged in a three-dimensional matrix.

The sewage treatment device according to claim 1 or 2, wherein: the biological carrier filler region covers the overflow passage and the sewage overflow cross section; and the total length of the biocarrier filler region along the water flow direction At least 50% of the length of the cavity of the sewage treatment device along the water flow direction.

4. A sewage treatment plant according to claim 1 or 2, wherein: said biocarrier filler is intimately coupled to said longitudinal body separator.

The sewage treatment apparatus according to claim 1 or 2, wherein a water buffer is formed between the biocarrier filler region and the overflow partition wall for buffering the pH of the water body.

The sewage treatment apparatus according to claim 1 or 2, wherein: the living organism The carrier filler region forms a sinking zone with the bottom wall of the cell body.

The sewage treatment device according to claim 1 or 2, wherein: at least one vent hole is provided in an upper portion of each of the longitudinal through-hole partitions, and each of the vent holes has a higher position than the over-circulation Road.

The sewage treatment apparatus according to claim 1 or 2, wherein: at least one cleaning inspection port is provided on each of the top walls of each of the overflow partition walls.

The sewage treatment apparatus according to claim 1 or 2, characterized in that: a clear inspection port is provided on the top wall directly above each of the overflow partition walls.

The sewage treatment apparatus according to claim 1 or 2, wherein: the water inlet is connected to an inlet pipe, and the water outlet is connected to an outlet pipe.

The sewage treatment apparatus according to claim 1 or 2, wherein the upper portion of the pool body is provided with a vent hole for discharging or collecting gas.

The sewage treatment apparatus according to claim 11, wherein the exhaust port is connected to an exhaust pipe.