CN101633545B - Integrated bio-ecological collaborative sewage treatment method and reactor - Google Patents

Abstract

The invention discloses an integrated biological and ecological cooperative sewage treatment reactor. The reactor comprises a biological treatment tank, an ecological treatment tank and a disinfection contact tank, wherein separation walls are vertically arranged in a biological treatment tank body and separate the tank body into a plurality of grids; a center grid is used as a blower chamber, and other grids are used as biological tanks provided with suspension stuffing, and the bottom of each tank is provided with a microporous aeration device and a sludge discharge pipe; the biological treatment tank and the ecological treatment tank are connected in series for operation and are separated by a vertically arranged separation wall into two grids; iron-rich stuffing is arranged and aquatic plants are planted in each grid which is also provided with a collector pipe connected with the disinfection contact tank; deflection and guiding separation walls are arranged in the disinfection contact tank to prolong the disinfection contact time; a drain pipe is arranged in a disinfection contact area; and the treated sewage is drained into water bodies nearby. The invention has the advantages of strong shockproof loading capacity, high treatment efficiency, low operation energy consumption, small remaining sludge amount, short process, small floor area, little investment, convenient management, and the like.

Description

Integrated bio-ecological collaborative sewage treatment method and reactor

technical field

The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to an integrated bio-ecological collaborative sewage treatment reactor.

Background technique

Conventional urban sewage treatment facilities require large investment, high operating costs, and complex operation and management, making it difficult to promote them in small towns. In recent years, the reactor technology for small town sewage treatment has developed rapidly, such as CN2811278Y "six-dimensional three-phase biological treatment process device", CN1552644 "a small town sewage treatment process" and CN2780751 "baffled wetland" published in Chinese patents filter + lateral subsurface flow wetland bed sewage treatment system" and so on, the first two are bioreactors, which are different from the biological and ecological synergistic treatment of this reactor. In order to achieve higher treatment efficiency, the process flow is longer and the structure is relatively It is complex and consumes a lot of energy, which is not conducive to the operation and management of small town sewage treatment reactors; the latter is a continuous flow artificial wetland treatment system, which is quite different from the intermittent flow ecological treatment pool in this reactor. It adopts the sequence batch operation mode and has the functions of high-efficiency filtration and precipitation area and phosphorus and nitrogen removal. In addition, the latter has the problem of occupying a large area. However, this ecological treatment pool has high efficiency and a small footprint, and there is no report about an integrated bio-ecological collaborative sewage treatment reactor at home and abroad.

Contents of the invention

In view of the deficiencies in the existing small town sewage treatment process, the purpose of the present invention is to provide an integrated bio-ecological synergistic sewage treatment method and reactor, which organically combines biological treatment and ecological treatment to simplify the treatment process, reduce investment, The purpose of enhancing the treatment efficiency of the reactor, reducing the treatment cost and reducing the land occupation.

The technical scheme that the object of the present invention realizes is as follows:

An integrated bio-ecological collaborative sewage treatment method, the method process is:

(1) Biological treatment: Utilize the biological treatment tank with multi-cell structure, adopt the parallel sequential batch operation mode, and the cycle operation mode of the single-cell biological treatment tank is water inlet-reaction-precipitation-water outlet, parallel operation; firstly, the sewage is sent to Enter the biological treatment tank equipped with suspended fillers and microporous aeration devices, and perform alternate aerobic and anoxic anaerobic operations in an intermittent aeration environment, and use microorganisms to degrade organic matter in sewage, synchronous nitrification and denitrification denitrification and phosphorus removal biological deal with;

(2) Ecological treatment: the effluent of the above-mentioned sequential batch biological treatment tanks enters the ecological treatment tanks in sequence batch mode in which iron-rich fillers are set and aquatic plants are planted in turn. The ecological treatment tanks also have a multi-cell structure, and the multi-cell ecological The pools are operated in parallel, and the cycle operation mode of each ecological treatment pool is water intake-reaction-outlet-drainage, using iron-rich and calcium-rich substrates, microorganisms on the substrates, and aquatic plants to further remove organic matter and remove phosphorus and nitrogen;

(3) Disinfection treatment: the effluent from the ecological treatment pool flows into the disinfection contact pool, where it is disinfected with disinfectants, and the treated sewage is discharged into nearby water bodies.

The structure of the integrated bio-ecological synergistic sewage treatment reactor that realizes the above method is as follows: it includes a biological treatment pool, an ecological treatment pool, a disinfection pool, a piping system and ancillary equipment, and a partition wall is set in the body of the biological treatment pool to separate the pool body There are multiple grids: the center grid is the blower room, which is used to place the blower; the rest of the surrounding grids are biological treatment tanks, and suspended fillers are installed in each reaction tank. Each compartment of the biological reaction tank has independent water inlet and outlet pipes and blast aeration system, which can make the integrated bio-ecological collaborative sewage treatment reactor realize the sequential batch operation mode. There are mud discharge pipes at the bottom of each tank, which can be used regularly Sludge is discharged from the sedimentation and separation area of each reaction tank, and the effluent is discharged to the ecological treatment tank. The ecological treatment pool and the disinfection pool surround the biological treatment pool and have the same wall as the biological treatment pool, so that batch operation can be realized. The ecological treatment pool is divided into at least two compartments by a partition wall, each compartment is provided with iron-rich filler and planted with aquatic plants, and the bottom of the pool is provided with an ecological treatment pool collection pipe; the disinfection contact pool is separated by a partition wall into a dissolving and dosing area and a disinfection area. In the contact area, baffle walls are set in the drug-dissolving and dosing area to prolong the disinfection contact time, and the outlet pipe of the disinfection contact pool is set at the end of the water flow to discharge the treated sewage into nearby water bodies.

Compared with the prior art, the present invention has the following characteristics:

①Bio-ecological synergistic treatment reactor has high treatment efficiency and stable effluent quality

Because the reactor adopts the biofilm process (that is, the suspended filler is set in the tank), the reactor has a high microbial concentration, strong impact load resistance and adaptability; by setting the combined filler in the biological treatment tank and controlling the appropriate dissolved oxygen Level, aerobic and anoxic microenvironments can be formed inside the biofilm, and it is easy to realize efficient simultaneous nitrification and denitrification denitrification. At the same time, the reactor adopts sequential batch operation, and the aerobic-anoxic-anaerobic alternate operation can be realized in the reaction tank through intermittent aeration, which creates a good environment for biofilm phosphorus removal. In addition, through ecological synergistic treatment, iron-rich and calcium-rich substrates, microorganisms on the substrates, and aquatic plants are used to further remove phosphorus and nitrogen in the constructed wetland system, and through the filtration of the wetland substrate layer, the reactor can obtain higher treatment efficiency. and stable effluent quality.

②Flexible operation and low energy consumption

Usually, the energy consumption in the process of sewage treatment accounts for a relatively large proportion of its operating cost, and reducing energy consumption is the key to reducing operating costs. The energy consumption in the general sewage treatment process is mainly used for the lifting of sewage, aeration, and the return of nitrifying liquid and sludge. The reactor can realize high-efficiency synchronous nitrification and denitrification by setting suspended packing in the biological pool, and the mixed liquid reflux system is omitted. At the same time, aerobic-anoxic-anaerobic alternate operation is realized in the reaction tank by adopting the sequential batch operation mode and controlling the aeration mode, which builds a good environment for the efficient phosphorus removal by the biofilm method, and saves the sludge of the general phosphorus removal system Return system. Moreover, the biofilm method is used to construct the treatment system, which saves the stirring device required by the general reactor in the process of anaerobic phosphorus release and anoxic denitrification. In addition, the use of ecological collaborative processing without energy consumption further improves the processing efficiency and also provides a guarantee for the stability of the effluent water quality. And in seasons with high temperatures, by adjusting the working conditions of biological pools and ecological pools, it is possible to focus on ecological treatment, supplemented by biological treatment, and further reduce operating energy consumption. Therefore, the reactor has the characteristics of high efficiency and low consumption.

③Less residual sludge

The suspended filler is set in the biological treatment tank to form a stable complex ecosystem composed of multiple trophic levels, which reduces the sludge production. On the other hand, the ecological co-processing part hardly produces excess sludge.

④Short process flow, integrated design, less land occupation and low investment

The reactor integrates process units such as water volume adjustment, organic matter removal, biological phosphorus and nitrogen removal, sludge reduction, sedimentation, ecological treatment, and disinfection. In particular, the blower room and the biological treatment pool are constructed by using the same wall of the reactor. Integrated, the ecological treatment unit is integrated with the biological treatment pool and disinfection pool, which greatly reduces the investment and land occupation of the reactor. Inlet and outlet water can adopt intermittent flow and multiple groups of parallel operation, which has the characteristics of flexible and convenient operation and management.

⑤ Integrating biological and ecological treatment into one, the landscape effect is good

Description of drawings

Figure 1: Plane view of integrated bio-ecological sewage treatment reactor;

Figure 2: Sectional view of integrated bio-ecological sewage treatment reactor;

Detailed ways

Referring to Fig. 1 and Fig. 2, the reactor includes biological treatment pool 1, ecological treatment pool 2, disinfection contact pool 3, biological pool treatment pool inlet pipe 4, biological treatment pool outlet pipe 5, ecological treatment pool outlet water collection pipe 6, disinfection contact pool Pool outlet pipe 7, mud discharge pipe 8 and air blower 9 etc. Four sides of the first partition wall 10 are vertically arranged in the biological treatment tank 1, and the biological treatment tank 1 is divided into five grids, and the central grid is used as the air blower room 11, wherein the air blower 9 is arranged, and the air pipe 12 is used to blow air into the biological treatment tank. The microporous aeration head 15 provides air. The other four grids are biological reaction tanks, and suspension fillers 14 (specifically spherical semi-soft composite fillers) are arranged in each tank. The water inlet pipe 4 of the biological pool treatment pool is arranged on the top of the biological treatment pool 1 and leads into each grid of biological reaction pools respectively. Microporous aeration heads 15 are arranged at the bottom of each biological reaction tank, and the bottom of each tank is made of a concave structure to form a mud bucket 16, and a mud discharge pipe 8 is provided to discharge mud after sedimentation and separation in each reaction tank for a certain period of time. Outlet pipes 5 are provided in the four grid biological pools, and the treated sewage is discharged into the ecological treatment pool 2 . The ecological treatment pool 2 shares the wall with the biological treatment pool 1, surrounds it, and runs in series with it. The second partition wall 17 is vertically arranged in the pool, and the ecological treatment pool 2 is divided into two ecological reaction pools. Each ecological reaction pool is filled with substrate, and aquatic plants such as water cattail, beautify and windmill grass are planted. Each ecological reaction tank is equipped with an ecological treatment tank outlet water collection pipe 6, which collects and transports the treated sewage to the disinfection contact tank 3. The disinfection contact pool 3 is divided into a drug-dissolving dosing area 20 and a disinfection contact area 21 by a third partition wall 19. After the disinfectant is dissolved and mixed in the drug-dissolving area 20, it will be injected into the disinfection contact area 21 through the dosing tube 22, and the disinfection A baffle and diversion wall is set in the contact area 21 to prevent short flow and prolong the disinfection contact time. A disinfection contact pool outlet pipe 7 is provided at the end of the disinfection contact area 21 to discharge the treated sewage into nearby water bodies.

The water treatment process of this reactor is as follows: the sewage first enters the biological treatment tanks operated in parallel with four grids in turn, and each biological treatment tank is operated periodically in a sequential batch mode (water intake-reaction-precipitation-water outlet); the organic matter in the sewage, Pollutants such as nitrogen and phosphorus are removed through biodegradation and adsorption. The invention adopts the biofilm treatment technology, and by setting the suspended spherical semi-soft filler in the reactor, a rich aerobic and anoxic microenvironment can be formed inside the biofilm, and it is easy to realize efficient synchronous nitrification and denitrification denitrification. At the same time, the reactor adopts sequential batch operation. Through the control of the working conditions, the alternating operation of aerobic, anoxic and anaerobic can be realized in the reaction tank, which creates a good environment for biofilm phosphorus removal. The effluent of the biological treatment tank enters the two external ecological reaction tanks running in parallel in turn (that is, the artificial wetland system), and each ecological treatment tank operates periodically in a sequential batch mode (water intake-reaction-outlet-drainage); ecological treatment The pool uses iron-rich and calcium-rich fillers, microorganisms and aquatic plants to strengthen the removal of organic matter, nitrogen and phosphorus, and removes suspended matter through the filtration of artificial substrates to ensure the treatment efficiency of the system. Finally, the treated water in the ecological treatment pool also flows into the disinfection contact pool, where it is disinfected with disinfectants, and finally discharged into nearby water bodies.

The main technical parameters:

COD volume load: the COD volume load of the biological treatment tank is 1.0kgCOD/m ³ .d

Structural parameters:

Integrated reactor specification (L×B×H): (L, B, H represent length, width and height respectively)

Effective water depth in reaction zone H ₁ ＝H-0.5(m)

The effective volume of the reaction tank V=Q/m×n×M(m ³ ) (Q is the abbreviation of Quantity, that is, the flow rate, unit: m ³ /d, m is the drainage ratio, and n is the number of reaction cycles per day in the single-cell biological reaction tank , M is the number of cells in the biological reaction tank)

Claims (5)

1. An integrated bio-ecological collaborative sewage treatment method, the process of which is: (1) Biological treatment: Utilize the biological treatment tank divided into multi-cell structure, adopt the sequential batch operation mode, and the cycle operation mode of each biological treatment tank is water inlet-reaction-precipitation-water outlet, parallel operation; firstly, the sewage is sequentially It is fed into each biological treatment tank equipped with suspended filler and microporous aeration device, and aerobic-anoxic-anaerobic alternate operation is carried out in an intermittent aeration environment, and organic matter degradation, synchronous nitrification and denitrification denitrification and Phosphorus removal biological treatment; (2) Ecological treatment: Let the effluent of the above-mentioned sequential batch operation biological treatment pools enter the ecological treatment pools in which iron-rich fillers are installed and aquatic plants are planted in sequential batch mode in turn. The ecological treatment pools also adopt a multi-cell structure , the cycle operation mode of each ecological treatment pool is water inlet-reaction-water outlet-idle, using iron-rich and calcium-rich substrates, microorganisms on the substrates, and aquatic plants to further remove organic matter, phosphorus and nitrogen; (3) Disinfection treatment: the effluent from the ecological treatment tank flows into the disinfection contact tank, where it is disinfected with disinfectants, and the treated sewage is finally discharged into nearby water bodies. 2. Realize the integrated bio-ecological synergistic sewage treatment reactor of the method described in claim 1, comprise biological treatment pool (1), ecological treatment pool (2), disinfection contact pool (3), biological treatment pool inlet pipe (4) , biological treatment tank outlet pipe (5), ecological treatment tank water collection pipe (6), disinfection contact tank outlet pipe (7), sludge discharge pipe (8) and blower (9); it is characterized in that: A partition wall is vertically arranged in the biological treatment tank (1), and the biological treatment tank (1) is divided into multiple compartments, and the center grid is used as a blower room, and a blower is provided to deliver air to the microporous aeration device (15). The rest of the surrounding grids are biological reaction tanks. Each tank has independent water inlet and outlet pipes. Suspended fillers are arranged in the tanks. Microporous aeration devices (15) are arranged at the bottom of the tanks for intermittent aeration. The bottom of each tank is equipped with mud discharge pipes ( 8), the effluent is discharged into the ecological treatment pool (2); The ecological treatment pool (2) is divided into at least two compartments by a vertically arranged partition wall, which respectively receive sewage discharged from the biological treatment pool (1) for further treatment. Iron-rich fillers are set in each compartment and aquatic plants are planted, and the pool Ecological treatment pool water collection pipe (6) is set at the bottom, connected to disinfection contact pool (3); The disinfection contact tank (3) discharges the treated sewage to the nearby water body through the outlet pipe (7) of the disinfection contact tank. 3. The integrated bio-ecological synergistic sewage treatment reactor according to claim 2, characterized in that: the disinfection contact pool (3) is divided into a drug-dissolving area (20) and a disinfection contact area by a partition wall (19) (21), a baffle retaining wall is set in the dissolving drug dosing area (20), and a disinfection contact pool outlet pipe (7) is set at the end of the water flow. 4. The integrated bio-ecological synergistic sewage treatment reactor according to claim 2 or 3, characterized in that: the ecological treatment pool (2) surrounds the biological treatment pool (1), and the biological treatment pool (1) Common wall construction. 5. The integrated bio-ecological synergetic sewage treatment reactor according to claim 2 or 3, characterized in that: the suspended filler is a spherical suspended semi-soft composite filler.

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