CN212504220U

CN212504220U - Odor and sewage synchronous treatment system

Info

Publication number: CN212504220U
Application number: CN202021947721.0U
Authority: CN
Inventors: 孟凡刚; 范福强; 徐荣华; 王德朋; 孟雅冰; 赵姗姗
Original assignee: National Sun Yat Sen University
Current assignee: Sun Yat Sen University; National Sun Yat Sen University
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-02-09
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses a system for synchronous processing of odor and sewage, which comprises a²O-MBR integrated reactor, said A²The O-MBR integrated reactor comprises a sealed reaction tank, an odor aeration component, an oxygen aeration component, a water inlet pipe and a water drain pipe, wherein the interior of the sealed reaction tank is divided into an anaerobic zone, an anoxic zone and an aerobic zone, and the water inlet pipe, the anaerobic zone, the anoxic zone and the aerobic zone are arranged on the inner wall of the sealed reaction tankThe aerobic zone and the drain pipe are sequentially connected and arranged according to the water flow direction, the odor aeration component is connected with the anoxic zone, and the oxygen aeration component is connected with the aerobic zone. The utility model discloses establish biological treatment system with aeration type activated sludge process and MBR coupling to integrate, the actual foul smell of synchronization processing sewage treatment plant and sewage, the play water quality of system is good, takes up an area of fewly, easily integratively. In the aspect of deodorization potential, the system has high volume load, higher population abundance and diversity, and can effectively degrade various components in the odor.

Description

Odor and sewage synchronous treatment system

Technical Field

The utility model belongs to the technical field of foul smell and sewage biological treatment, concretely relates to system for synchronous processing of foul smell and sewage.

Background

With the acceleration of the urbanization process and the improvement of the requirement on the water environment quality, the number of sewage treatment plants in all parts of the country is increased year by year. The dissolved oxygen in the sewage is easy to be consumed in the long-distance conveying process of the pipeline, so that the sulfate in the sewage is reduced to generate H₂S gas, and organic matters containing N, S and other elements are biodegraded by biological anaerobic to generate other malodorous gases. Therefore, the main component of the sewage treatment plant odor is H₂S and NH₃The inorganic substance may be a sulfur-containing organic substance such as mercaptan, or an organic substance such as an amine, a low fatty acid, an aldehyde ketone, or a halogenated hydrocarbon. The odor pollution of sewage treatment plants is related to the living health of surrounding residents and the normal construction and operation of water plants, and becomes one of the main problems to be solved in the field of sewage treatment in China at present.

As for the treatment method of the odor, the biological deodorization method has incomparable advantages compared with the traditional method, such as simple operation, low investment, low treatment cost, no secondary pollution and the like, and has wide prospect in treating the odor. However, there are many problems to be solved in theoretical research and practical application, and the odor is often passively treated, requiring separate treatment process and equipment, and separate operation, management and maintenance, so that the cost in terms of infrastructure, site, operation, maintenance and the like is high. In addition, the maintenance of the microbial activity of the sludge in the existing deodorization process depends on the continuous addition of nutrient solution, cannot be combined with the synchronous treatment of the existing sewage treatment process, and brings certain difficulty to the process design for removing the odor.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model aims to provide a synchronous treatment system for odor and sewage. The utility model discloses will aerate formula activated sludge process (A)²O) and MBR are coupled to construct a biological treatment system to integrally and synchronously treat the actual odor and sewage of a sewage treatment plant, and the system has good effluent quality, small occupied area and easy integration. In the aspect of deodorization potential, the system has high volume load, higher population abundance and diversity, and can effectively degrade various components in the odor.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a synchronous odor and sewage treating system comprises A²O-MBR integrated reactor, said A²O-MBR integrated reactor includes reaction tank, foul smell aeration subassembly, oxygen aeration subassembly, inlet tube and drain pipe, the inside partition of reaction tank becomes anaerobic zone, anoxic zone and aerobic zone, the inlet tube anaerobic zone anoxic zone the aerobic zone with the drain pipe connects gradually the setting according to the rivers direction, foul smell aeration subassembly with anoxic zone links to each other, oxygen aeration subassembly with aerobic zone links to each other, the inside in aerobic zone is equipped with the dull and stereotyped membrane module of MBR, the delivery port of the dull and stereotyped membrane module of MBR with the drain pipe links to each other.

When the system is in operation, sewage enters the water inlet pipe A²The O-MBR integrated reactor sequentially passes through an anaerobic zone, an anoxic zone and an aerobic zone, is finally filtered by an MBR flat membrane and is discharged from a drain pipe, the odor is introduced in a micro-aeration mode through an odor aeration component, and in addition, the oxygen in the system is continuously aerated through an oxygen aeration componentIntroducing gas.

Preferably, a first overflow hole is formed between the anaerobic zone and the anoxic zone, the anaerobic zone is communicated with the anoxic zone through the first overflow hole, a second overflow hole is formed between the anoxic zone and the aerobic zone, and the anoxic zone is communicated with the aerobic zone through the second overflow hole. The first overflow hole and the second overflow hole can ensure normal mass transfer among the anaerobic zone, the anoxic zone and the aerobic zone.

Preferably, the anaerobic zone and the anoxic zone are respectively provided with a stirring paddle inside, and the top of the anaerobic zone and the anoxic zone are respectively provided with a motor for driving the stirring paddles. Mechanical stirring is adopted in the anaerobic zone and the anoxic zone, so that the internal activated sludge can be fully mixed with the matrix, and the treatment effect of sewage and odor is improved.

Preferably, odor aeration subassembly includes micropore aerator, odor delivery pipe, first gas flowmeter and first air-blowing pump, micropore aerator locates the bottom in anoxic zone, odor delivery pipe with micropore aerator links to each other, first gas flowmeter with first air-blowing pump is located on the odor delivery pipe. Therefore, the utility model discloses an odor aeration subassembly lets in the odor to the anoxic zone with little aeration mode, because the odor collecting process has contained very most air, the existence of oxygen can provide the electron acceptor in the gas, consumes the soluble organic matter in the mixed flow system in advance through effects such as oxidation and degradation to effectively alleviate the membrane pollution problem that soluble organic matter caused, make the pollution cycle of the dull and stereotyped membrane of MBR prolong greatly.

Preferably, the anoxic zone is arranged in a sealing way, and the top of the anoxic zone is provided with an exhaust port. Therefore, the treated gas can be conveniently collected, and the odor treatment effect of the system can be monitored.

Preferably, the oxygen aeration assembly comprises an aerator, an oxygen conveying pipe, a second gas flow meter and a second air pump, wherein the aerator is arranged at the bottom of the aerobic zone, the oxygen conveying pipe is connected with the aerator, and the second gas flow meter and the second air pump are arranged on the oxygen conveying pipe. Therefore, the oxygen aeration component of the utility model can introduce oxygen into the aerobic zone in a continuous aeration mode.

Preferably, the aerobic zone is connected to the anaerobic zone by a reflux pump. Therefore, the sludge and the nitrifying liquid in the aerobic zone can flow back to the anaerobic zone through the reflux pump to supplement the sludge in the anaerobic zone, and denitrification is performed under anaerobic conditions, so that pre-denitrification of the system is realized. Meanwhile, the system also ensures that the phosphate of the effluent reaches the standard and is discharged through the release of the phosphate of the sludge under the anaerobic condition, the absorption of the phosphate under the aerobic condition and the periodic sludge discharge.

Preferably, a vacuum pressure gauge and a water outlet pump are arranged on the water outlet pipe. Thus, the water outlet flow of the system can be controlled by the water outlet pump.

Preferably, the system for synchronously treating odor and sewage further comprises a water inlet tank, the water inlet tank is connected with the anaerobic zone through the water inlet pipe, and a water inlet pump is arranged on the water inlet pipe. From this, the case of intaking can be used to store sewage.

The utility model also provides a method of synchronous processing of foul smell and sewage, including adopting the system of synchronous processing of foul smell and sewage is handled, and the step is as follows:

(1) a starting stage: firstly, introducing sewage into a system for treatment, wherein the concentration of sludge in a sealed reaction tank is maintained at 6000-8000 mg/L, the sludge age is 20 days, the concentration of dissolved oxygen is maintained at 0.5-2 mg/L, and the reflux ratio of sludge and nitrifying liquid is 200%;

(2) and (3) an operation stage: after the system runs stably, introducing odor into the system, and controlling the dissolved oxygen concentration of the anoxic zone to be maintained at 0-0.2 mg/L, the dissolved oxygen concentration of the anaerobic zone to be maintained below 0.1mg/L, and the dissolved oxygen concentration of the aerobic zone to be controlled at 0.5-2 mg/L.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the system of the utility model realizes A²The coupling of O (aeration activated sludge process) and MBR (membrane bioreactor) integrates A²The advantages of the O and MBR processes are that the odor and the sewage can be synchronously treated in the same reactor without a separate odor treatment unitThe membrane effluent replaces a secondary sedimentation tank, so that the land occupation cost and the operation cost are greatly saved. And simultaneously, the utility model discloses in, the synchronous processing of sewage and foul smell has played the effect of supplementing each other and having become, contains the required various elements of microorganism growth in the sewage, and the sewage treatment process also enables the microbial activity of system and maintains at relatively stable state, and the soluble organic filth among the foul smell treatment process consumable system has alleviated the membrane pollution problem that soluble organic filth caused.

2. The system has high volume load, can efficiently treat the odor in situ while ensuring the sewage treatment effect, can maintain the microbial biomass with high concentration in the system, has higher population abundance and diversity, and can effectively degrade various components in the odor. The high-concentration activated sludge content of the system can also increase the viscosity of the sludge and enhance the adsorption capacity of the sludge on various odor components.

3. The system has the advantages of simple operation, economy, practicality, high treatment efficiency and high integration, and realizes the high-efficiency treatment of sewage while realizing high-efficiency deodorization. In the stable operation process of the system, the total nitrogen removal rate exceeds 70%, the total phosphorus removal rate exceeds 90%, the total phosphorus concentration of the effluent is kept about 0.20mg/L, the ammonia nitrogen removal rate exceeds 97%, the COD removal rate is about 92%, and the effluent quality reaches the first-level A standard of pollutant discharge Standard of urban sewage treatment plants. At the same time, NH is the main odor component₃The removal rate of (1) is 100% (inlet gas is 215-2051 ppm), H₂The removal rate of S is 94.7-100% (air intake is 19-135 ppm).

4. To sewage treatment plant, realize the utility model discloses the system construct, only need add fan and piping on original sewage treatment facility basis, with the foul smell introduce in the aeration tank can, the investment that has significantly reduced and capital construction cost, and easily operation maintenance, the advantage is obvious, has demonstrated huge application prospect in the aspect of the deodorization.

Drawings

FIG. 1 is a schematic structural view of a synchronous odor and sewage treatment system of the present invention.

In the figure, a water inlet tank 1, a water inlet pipe 2, a water discharge pipe 3, an anaerobic zone 4, an anoxic zone 5, an aerobic zone 6, an exhaust port 7, a water inlet pump 8, a reflux pump 9, a vacuum pressure gauge 10, a water outlet pump 11, a first overflow hole 12, a second overflow hole 13, a stirring paddle 14, a microporous aerator 15, an odor delivery pipe 16, a first gas flowmeter 17, a first aeration pump 18, an aerator 19, an oxygen delivery pipe 20, a second gas flowmeter 21, a second aeration pump 22 and an MBR flat membrane module 23.

Detailed Description

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

As shown in FIG. 1, the system for synchronously treating odor and sewage provided by the embodiment comprises a water inlet tank 1 and a²O-MBR integrated reactor, wherein A²The O-MBR integrated reactor comprises a reaction tank, an odor aeration component, an oxygen aeration component, a water inlet pipe 2 and a water discharge pipe 3, wherein the reaction tank is internally divided into an anaerobic zone 4, an anoxic zone 5 and an aerobic zone 6, the anoxic zone 5 is subjected to sealing treatment, and the top of the anoxic zone is provided with an exhaust port 7. The water inlet tank 1, the water inlet pipe 2, the anaerobic zone 4, the anoxic zone 5, the aerobic zone 6 and the drain pipe 3 are sequentially connected and arranged according to the water flow direction, the water inlet pipe 2 is provided with a water inlet pump 8, the aerobic zone 6 is connected with the anaerobic zone 4 through a reflux pump 9, and the drain pipe 3 is provided with a vacuum pressure gauge 10 and a water outlet pump 11. A first overflow hole 12 is arranged between the anaerobic zone 4 and the anoxic zone 5, and the anaerobic zone 4 is communicated with the anoxic zone 5 through the first overflow hole 12. A second overflow hole 13 is arranged between the anoxic zone 5 and the aerobic zone 6, and the anoxic zone 5 is communicated with the aerobic zone 6 through the second overflow hole 13. The inside of anaerobic zone 4 and anoxic zone 5 is equipped with stirring rake 14 respectively, and the top in anaerobic zone 4 and anoxic zone 5 is equipped with the motor of drive stirring rake 14 respectively. The odor aeration component is connected with the anoxic zone, the odor aeration component comprises a microporous aerator 15, an odor delivery pipe 16, a first gas flow meter 17 and a first air-blowing pump 18, the microporous aerator 15 is arranged at the bottom of the anoxic zone 5, the odor delivery pipe 16 is connected with the microporous aerator 15, and the first air-blowing pump is a pump for supplying air to the anoxic zoneThe air flow meter 17 and the first air pump 18 are provided on the odor delivery pipe 16. The oxygen aeration component is connected with the aerobic zone 6 and comprises an aerator 19, an oxygen conveying pipe 20, a second gas flow meter 21 and a second air-blowing pump 22, the aerator 19 is arranged at the bottom of the aerobic zone 6, the oxygen conveying pipe 20 is connected with the aerator 19, and the second gas flow meter 21 and the second air-blowing pump 22 are arranged on the oxygen conveying pipe 20. Three sets of MBR flat membrane modules 23 are arranged in the aerobic zone 6, and the water outlets of the MBR flat membrane modules 23 are respectively connected with the water discharge pipe 3.

Examples of the experiments

With the utility model discloses a system synchronous treatment sewage and foul smell, concrete method is as follows:

(1) a starting stage: the stability of the water treatment performance of the system,

the effective volume of the sealed reaction tank is designed to be 24L (wherein the anaerobic zone and the anoxic zone are 6L respectively, and the aerobic zone is 12L), three sets of MBR flat-plate membrane components are arranged in the aerobic zone, the membrane material is PVDF, the membrane aperture is 0.1 μm, and the effective membrane area of each set of membrane components is 0.1m². The membrane flux was set to 10L/(m)²H) corresponding to a hydraulic retention time of 8 h. With A²The method is characterized in that sludge in a secondary sedimentation tank of a certain urban sewage treatment plant mainly based on the/O process is used as inoculation sludge, inlet water of a fine grid of the sewage treatment plant is used as a water inlet source of a system, the sludge concentration of the system in the initial operation stage is maintained to be 6000-8000 mg/L, the sludge age of the system is set to be 20 days, and the dissolved oxygen concentration in the system is maintained to be 0.5-2 mg/L. The sludge and the nitrifying liquid flow back to the anoxic zone from the aerobic zone, and the reflux ratio is 200 percent. The effluent of the system is discharged after being filtered by a flat membrane, and reaches the discharge standard. The stage is a stable stage of the water treatment performance of the system, and the odor treatment is not operated.

The COD of the inlet water of the sewage plant is 215.8-273 mg/L, and the NH content is₄ ⁺N is 19-31 mg/L, TN is 22-33 mg/L, and TP is 2-4 mg/L.

The denitrification and dephosphorization conditions after the system is continuously operated for 23d are shown in the following table (average value of days 6-23):

(2) and (3) an operation stage: after the system runs stably, the odor aeration component is started, odor is introduced into the system, the dissolved oxygen concentration of the anoxic zone is maintained to be 0-0.2 mg/L, the dissolved oxygen concentration of the anaerobic zone is maintained to be below 0.1mg/L, and the dissolved oxygen concentration of the aerobic zone is controlled to be 0.5-2 mg/L.

The odor emission condition of each treatment unit of the sewage treatment plant is monitored, and the fine grid containing high-concentration odor is determined to be used as an odor collection point. According to the design of the sewage plant water inlet system and the waste sludge treatment system, the yield of the odor (6000 m)³H) and daily wastewater treatment capacity (100000 m)³The ratio of/d), after the system is stably operated, introducing the odor collected at the fine grid into an anoxic zone through an odor aeration component at different operation stages at the flux of 30, 90 and 150mL/min, respectively operating for 34, 34 and 38 days, and sealing the anoxic zone to conveniently collect the treated odor. Before and after treatment, the odor main component NH is periodically sampled and monitored₃And H₂S concentration and sampling twice during 150mL/min odor flux run, odor concentration, carbon disulfide, trimethylamine, methyl mercaptan, dimethyl sulfide, dimethyl disulfide, etc. content, and concentration of 34 VOCs containing styrene, etc. were tested. After the ozone is introduced into the anoxic zone through micro-aeration, the dissolved oxygen is between 0 and 0.2mg/L, and the dissolved oxygen in the anaerobic zone is below 0.1 mg/L. Meanwhile, transmembrane pressure difference (TMP) of each MBR flat plate membrane module is recorded regularly, and the occurrence frequency of membrane pollution is obtained.

Nitrogen and phosphorus removal treatment of sewage

The actual domestic sewage is taken as the inlet water, the COD is about 120-380 mg/L, and NH is added₄ ⁺The N content is 10-30 mg/L, the TN content is 15-40 mg/L, and the TP content is 1.3-7 mg/L.

The nitrogen and phosphorus removal conditions of the system continuously running for 130d are as follows (mean value of 24 th to 130 th balance):

before the anoxic zone is not subjected to micro-aerobic aeration, the period of membrane pollution is about 25-35 days, and the period of membrane pollution is increased to more than 70 days after the micro-aerobic aeration is started.

NH in odor in case of fluctuation of content of odor₃The removal rate of (1) is 100% (the inlet gas is 215-2051 ppm), H₂The removal rate of S is 94.7-100% (air intake is 19-135 ppm). When the treatment capacity of the odor is 150mL/min, the main odor causing substances in the treated odor are tested in different time periods: trimethylamine, methyl mercaptan, methyl sulfide, dimethyl disulfide and the like are all lower than the detection limit, and styrene is less than or equal to 0.0015mg/m³Carbon disulfide is less than or equal to 0.05 mg/m³. The odor concentration (dimensionless) decreased from 7244 and 5495 to 417 and 977, respectively, and the removal rate was 94.2% and 82.2%, respectively. It is visible that the utility model discloses the system all has good effect of getting rid of to each material in the foul smell.

To sum up, can see from above-mentioned testing result, the utility model discloses a but system simultaneous processing domestic sewage and sewage treatment plant's foul smell, the treatment effect is good.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A synchronous odor and sewage treatment system is characterized by comprising A²O-MBR integrated reactor, said A²O-MBR integrated reactor includes sealed reaction tank, foul smell aeration subassembly, oxygen aeration subassembly, inlet tube and drain pipe, the inside partition of sealed reaction tank becomes anaerobic zone, anoxic zone and aerobic zone, the inlet tube anaerobic zone anoxic zone the aerobic zone with the drain pipe connects gradually the setting according to the rivers direction, foul smell aeration subassembly with anoxic zone links to each other, oxygen aeration subassembly with aerobic zone links to each other, the inside in aerobic zone is equipped with the dull and stereotyped membrane module of MBR, the delivery port of the dull and stereotyped membrane module of MBR with the drain pipe links to each other.

2. The synchronous odor and sewage treatment system according to claim 1, wherein a first overflow hole is provided between the anaerobic zone and the anoxic zone, the anaerobic zone is communicated with the anoxic zone through the first overflow hole, a second overflow hole is provided between the anoxic zone and the aerobic zone, and the anoxic zone is communicated with the aerobic zone through the second overflow hole.

3. The system for synchronously treating odor and sewage as claimed in claim 1, wherein the anaerobic zone and the anoxic zone are respectively provided with a stirring paddle inside, and the top of the anaerobic zone and the anoxic zone are respectively provided with a motor for driving the stirring paddles.

4. The synchronous odor and sewage treatment system according to claim 1, wherein the odor aeration assembly comprises a micro-porous aerator, an odor delivery pipe, a first gas flow meter and a first air pump, the micro-porous aerator is arranged at the bottom of the anoxic zone, the odor delivery pipe is connected with the micro-porous aerator, and the first gas flow meter and the first air pump are arranged on the odor delivery pipe.

5. The synchronous odor and sewage treatment system as claimed in claim 1, wherein said anoxic zone is hermetically disposed and has a vent at the top thereof.

6. The odor and sewage synchronous treatment system according to claim 1, wherein the oxygen aeration assembly comprises an aerator, an oxygen delivery pipe, a second gas flow meter and a second air pump, the aerator is arranged at the bottom of the aerobic zone, the oxygen delivery pipe is connected with the aerator, and the second gas flow meter and the second air pump are arranged on the oxygen delivery pipe.

7. The system for synchronously treating odor and sewage according to claim 1, wherein the aerobic zone is connected with the anaerobic zone through a reflux pump.

8. The synchronous odor and sewage treatment system according to claim 1, wherein a vacuum pressure gauge and a water outlet pump are provided on the water outlet pipe.

9. The synchronous odor and sewage treatment system according to any one of claims 1 to 8, further comprising a water inlet tank connected to the anaerobic zone through the water inlet pipe, wherein a water inlet pump is provided on the water inlet pipe.