CN212050743U - Equipment for aerobic granular sludge sewage treatment process of two-stage sequencing batch reactor - Google Patents
Equipment for aerobic granular sludge sewage treatment process of two-stage sequencing batch reactor Download PDFInfo
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Abstract
The invention discloses equipment for a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process, which comprises a reactor A area and a reactor B area, wherein the reactor A area is provided with a first water inlet pipe and a first composite filler, the reactor B area is provided with a water outlet pipe, a connecting pipe is arranged between the reactor A area and the reactor B area, and the reactor A area and the reactor B area are both provided with aeration mechanisms. The granular sludge is rapidly cultured in the intermittent water feeding and intermittent aeration modes to enhance the sewage treatment efficiency, and a two-stage water feeding mode is adopted to save a carbon source; meanwhile, the reactor is ensured to have the characteristics of stronger impact load resistance, high efficiency of sewage treatment, low yield of excess sludge, thorough solid-liquid separation and the like.
Description
Technical Field
The invention belongs to the technical field of rural and urban domestic sewage treatment, and particularly relates to equipment for a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process.
Background
In the field of rural sewage treatment, rural sewage has the characteristics of low carbon, high nitrogen and phosphorus, large flow change and the like, and the difficulty and the cost of rural sewage treatment are limited by the characteristics. The activated sludge process is a biological waste water treatment technology mainly using activated sludge microorganisms. The technology is to perform continuous mixed culture on various microorganism populations in the sewage under the condition of artificial reinforcement to form activated sludge, and decompose and remove organic pollutants in the sewage under the proper condition by utilizing the microorganisms in the activated sludge. And then separating mud and water, and discharging the treated supernatant and the excess sludge out of the system. SBR is a short name of a sequencing batch activated sludge process, and is an activated sludge process which operates in a mode of sequentially intermittent water feeding and intermittent aeration. Its main characteristic is in order and intermittence in operation, the core of SBR technology is SBR reaction pool, which integrates the functions of homogenization, primary sedimentation, biodegradation and secondary sedimentation into one body, and in which the procedures of water inlet, reaction, sedimentation, water discharge and idle are completed. The device is suitable for occasions with intermittent discharge and large change of sewage flow.
The aerobic granular sludge technology is a novel sewage treatment technology and has the characteristics of large granular sludge biomass, long sludge age, low residual sludge yield, high granular settling speed, high sewage treatment efficiency, high organic load bearing capacity, high impact load resistance, high toxic and harmful resistance and the like. The aerobic granular sludge formation mechanism is complex and comprises physical, chemical and biological interactions. The formation process is generally regarded as an organism aggregation phenomenon formed by self-aggregation of microorganisms through a plurality of mechanisms (extracellular polymers, filamentous fungus skeletons, condensation nucleus induction and cation combination) under certain conditions of hydrodynamics, selective pressure and the like.
The traditional single-stage SBR granular sludge reactor needs to realize selective pressure, and the problem of high SS (suspended solid) of effluent is often caused.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides equipment for a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process, which combines an aerobic granular sludge method and a sequencing batch activated sludge method, has the advantages and stability in the aspects of strains, efficiency and the like in sewage treatment, and adopts intermittent water feeding and intermittent aeration modes to quickly culture granular sludge so as to improve the sewage treatment efficiency and stability of the system. The process adopts a two-stage staged water inlet mode to save carbon sources, and simultaneously solves the problem of high SS (suspended solid) of effluent possibly generated by high sedimentation speed of granular sludge. Ensures that the reactor has the characteristics of stronger impact load resistance, high pollutant removal efficiency, low residual sludge yield, thorough solid-liquid separation and the like. The whole process does not introduce too many treatment units, not only has high treatment efficiency and stable effluent reaching the standard, but also can control the cost at a lower level. The equipment has high water treatment efficiency, high water treatment effect, convenient operation and convenient maintenance.
In order to solve the technical problems, the invention adopts the following technical scheme:
a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process is characterized by comprising the following steps:
a. primary granular sludge sewage treatment: the raw water of the primary sewage enters the area A of the reactor, and the organic matters in the sewage are adsorbed and degraded by using aerobic granular sludge. The aerobic granular sludge can be maintained to be stable and the denitrification can be enhanced by adding the conditioned sludge micro powder. On one hand, the activated sludge is used for aerobic phosphorus absorption, on the other hand, the phosphorus removal composite filler in the area A of the reactor is used for strengthening the chemical phosphorus removal effect, and the phosphorus removal precipitate is used as an induced condensation nucleus to promote the sludge granulation process. Such as: iron chelate (microbiosensing effect and cell signal molecular science) generated by chemical phosphorus removal is used for providing coagulation nuclei and the like to jointly promote granulation of aerobic sludge, selective pressure is formed and controlled, and the aerobic granular sludge is quickly cultured. The aerobic granular sludge formed by the method has large grain size, compact structure and coexistence of various microorganisms, and the granules form aerobic, anoxic and anaerobic micro-environments from outside to inside, so that heterotrophic bacteria, nitrobacteria, denitrifying bacteria and the like can move in respective suitable spaces, and synchronous nitrification and denitrification and short-cut nitrification and denitrification can be realized. High efficiency and high settling speed.
b. And (3) secondary activated sludge sewage treatment: and introducing light floc sludge which is not easy to settle in the area A of the reactor and mixed liquor into the area B of the reactor together, introducing secondary raw sewage water in the area B of the reactor for supplementing a carbon source, treating the mixture in the area B of the reactor by adopting a sequencing batch activated sludge process, further removing nitrogen and phosphorus, standing and precipitating, and completing separation of sludge and supernatant. Granular sludge in the area A of the reactor has high settling speed and possibly generates high SS (suspended solid) of effluent, light sludge flocs in the area A of the reactor can be thoroughly separated from liquid in the area B of the reactor, and simultaneously, raw sewage and water are introduced to supplement a carbon source, so that the carbon source is saved.
c. Sludge collection and drying: and residual sludge generated in the zone B of the reactor is discharged to a sludge collecting and drying tank through periodic sludge discharge. And residual sludge generated in the zone B of the reactor is discharged to a sludge collecting and drying tank through periodic sludge discharge. The sludge collecting and drying tank returns the sludge leakage liquid to the zone B of the reactor through a return pipe, and the dried sludge rich in phosphorus in the sludge collecting and drying tank can be periodically cleaned and recycled or treated by a sludge treatment plant (such as sintered ceramsite).
Further, the detailed steps of step a are as follows:
1. the primary sewage raw water enters the reactor A area from the bottom, granular sludge is rapidly cultured in the high biomass area at the bottom, and the bottom water enters the reactor to promote the sludge granulation process, so that the aerobic granular sludge is rapidly cultured.
2. Stirring: homogenizing through a stirrer, and enhancing the adsorption and degradation of the granular sludge on organic matters in the sewage;
3. intermittent aeration: intermittent aeration is performed to complete biological nitrogen removal and organic matter removal, hydraulic shearing is formed by the aeration to promote sludge granulation, a chemical phosphorus removal process of the phosphorus removal composite filler is accelerated, a chelate produced by chemical phosphorus removal is used to further promote the sludge granulation, and an aerobic-anoxic-anaerobic layered microenvironment is easily formed by the granular sludge to realize synchronous nitrification and denitrification.
4. Controlling the selective pressure: and (3) in the area A of the reactor, the granular sludge with good sedimentation performance is left by controlling the selective pressure, and the light floc sludge which is not easy to settle and the mixed liquor are discharged into the area B of the reactor for further treatment.
The primary water inlet is fed from the bottom of the reactor A area through the first water inlet pipe, so that the granular sludge is favorably adsorbed and condensed in the bottom high biomass area, then the low-speed anaerobic stirring of the first stirrer is used for enhancing the adsorption and degradation of the granular sludge on the organic matters in the sewage, and then the denitrification and organic matter removal processes are completed through intermittent aeration. The granulation is promoted by utilizing the hydraulic shear formed by aeration, the chemical phosphorus removal process of the phosphorus removal composite filler is accelerated, and the granulation of the sludge is further promoted by utilizing a chelate produced by the chemical phosphorus removal. The characteristic that the granular sludge is easy to form an aerobic-anoxic-anaerobic layered microenvironment to realize synchronous nitrification and denitrification is utilized, and the degradation of organic matters is accelerated. Under the condition of short hydraulic retention in the area A of the reactor, the purposes of efficiently removing organic matters, nitrogen and phosphorus are achieved. Granular sludge with good sedimentation performance is left in the zone A of the reactor by controlling selective pressure, and flocculent sludge which is not easy to sediment and mixed liquor enter the zone B of the reactor through a connecting pipe.
Further, the detailed steps of step b are:
1. water inflow: introducing the light floc sludge which is not easy to settle in the area A of the reactor and the mixed liquor into the area B of the reactor;
2. carbon source supplement: introducing raw sewage into a zone B of the reactor, and stirring and homogenizing by a stirrer;
3. reaction: intermittent aeration, namely completing the processes of denitrification, nitrification, secondary denitrification and the like in stages;
4. standing: standing for precipitation, and separating sludge and supernatant.
The nitrate nitrogen sewage mixed liquid in the reactor A zone enters the reactor B zone, the secondary water inlet introduces the sewage raw water into the reactor B zone through the second water inlet pipe, and the second stirrer stirs and homogenizes the sewage raw water. The carbon source in the sewage raw water is utilized for denitrification, so that the aims of denitrification and carbon source saving are fulfilled. The reactor B area adopts a sequencing batch activated sludge process, integrates the functions of homogenization, primary sedimentation, biodegradation, secondary sedimentation and the like, and finishes the working procedures of water inlet, reaction, sedimentation, water drainage, idling and the like in the reactor B area. The gas stripping is completed through a small amount of aeration, and the separation of sludge and supernatant is realized through an ideal standing and precipitating process, so that the effluent SS is ensured to reach the standard stably.
The utility model provides a two-stage sequencing batch reactor aerobic granule mud sewage treatment process's equipment which characterized in that: including reactor A district and reactor B district, reactor A district is equipped with first inlet tube and first composite filler, and reactor B district is equipped with the outlet pipe, is equipped with the connecting pipe between reactor A district and the reactor B district, and reactor A district and reactor B district all are equipped with aeration mechanism, can convenient efficient carry out sewage treatment, and the treatment effect is good, and the operation is simple, the maintenance of being convenient for.
Further, a second composite filler is arranged in the zone B of the reactor. The dephosphorization efficiency in the zone B of the reactor is improved by the second composite packing.
Further, a second water inlet pipe is arranged in the area B of the reactor. The second water inlet pipe utilizes sewage raw water to supplement a carbon source in the zone B of the reactor, so that the carbon source can be saved.
Further, a first stirrer is arranged in the area A of the reactor, and the low-speed anaerobic stirring of the first stirrer enhances the adsorption and degradation of organic matters in the sewage by the granular sludge.
Further, a second stirrer is arranged in the area B of the reactor and is used for stirring and homogenizing.
Further comprises a sludge collecting and drying tank, and the sludge drying tank is connected with the B area of the reactor. And residual sludge generated in the zone B of the reactor is discharged to a sludge collecting and drying tank through periodic sludge discharge. The sludge collecting and drying tank returns the sludge leakage liquid to the zone B of the reactor through a return pipe, and the dried sludge rich in phosphorus in the sludge collecting and drying tank can be periodically cleaned and recycled or treated by a sludge treatment plant (such as sintered ceramsite).
Further, the aeration mechanism comprises an air pump, a one-way valve, an electromagnetic valve and an aeration device, wherein the air pump is connected with the one-way valve, the one-way valve is connected with the electromagnetic valve, and the electromagnetic valve is connected with the aeration device. Intermittent aeration realizes high-efficiency and quick sewage treatment.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1) the bottom water feeding mode is adopted, so that the sludge granulation process is promoted, and the aerobic granular sludge can be cultured quickly;
2) the aerobic granular sludge is beneficial to realizing synchronous nitrification and denitrification, two-stage water inlet saves carbon source and has high treatment efficiency; the settling speed is high, and the overlong hydraulic retention time is not needed; the sludge age is long, thereby being beneficial to sludge reduction;
3) the reaction in time is ideal plug flow, and the biochemical reaction has large push force; the precipitation is ideal standing precipitation, and the solid-liquid separation effect is good;
4) the intermittent operation saves energy consumption; the operation mode is flexible, and the denitrification effect is good;
5) the anaerobic environment, the anoxic environment and the aerobic environment are alternated, so that the sludge expansion is effectively prevented;
6) impact load resistance, high microbial activity of the reaction tank and strong sewage treatment capacity;
7) the facility has small floor area and simple and flexible process.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process of the present invention.
In the figure, 1-zone A of the reactor; 2-zone B of the reactor; 3-a first water inlet pipe; 4-a first composite filler; 5-water outlet pipe; 6-connecting pipe; 7-an aeration device; 8-a second composite filler; 9-a second water inlet pipe; 10-a first stirrer; 11-a second stirrer; 12-a sludge collecting and drying tank; 13-an air pump; 14-a one-way valve; 15-electromagnetic valve.
Detailed Description
As shown in FIG. 1, the aerobic granular sludge sewage treatment process of the two-stage sequencing batch reactor of the invention comprises the following steps:
a. primary granular sludge sewage treatment: the raw water of the primary sewage enters the area 1 of the reactor A, and the organic matters in the sewage are adsorbed and degraded by using aerobic granular sludge. The aerobic granular sludge can be maintained to be stable and the denitrification can be enhanced by adding the conditioned sludge micro powder. On one hand, the activated sludge is used for aerobic phosphorus absorption, on the other hand, the chemical phosphorus removal effect is enhanced by the phosphorus removal composite filler in the area A1 of the reactor, and the phosphorus removal precipitate is used as an induced condensation nucleus to promote the sludge granulation process. Such as: iron chelate (microbiosensing effect and cell signal molecular science) generated by chemical phosphorus removal is used for providing coagulation nuclei and the like to jointly promote granulation of aerobic sludge, selective pressure is formed and controlled, and the aerobic granular sludge is quickly cultured. The aerobic granular sludge formed by the method has large grain size, compact structure and coexistence of various microorganisms, and the granules form aerobic, anoxic and anaerobic micro-environments from outside to inside, so that heterotrophic bacteria, nitrobacteria, denitrifying bacteria and the like can move in respective suitable spaces, and synchronous nitrification and denitrification and short-cut nitrification and denitrification can be realized. High efficiency and high settling speed.
b. And (3) secondary activated sludge sewage treatment: and (2) introducing light floc sludge which is difficult to settle in the zone 1 of the reactor A and mixed liquor into a zone 2 of the reactor B, introducing secondary raw sewage water into the zone 2 of the reactor B for supplementing a carbon source, treating the mixture in the zone 2 of the reactor B by adopting a sequencing batch activated sludge process, further removing nitrogen and phosphorus, standing for precipitation, and completing separation of sludge and supernatant. Granular sludge in the zone A1 of the reactor has high settling speed and possibly generates high SS (suspended solid) of effluent, and the zone B2 of the reactor can completely separate solid and liquid of light sludge flocs in the zone A1 of the reactor, and simultaneously, sewage and raw water are introduced for supplementing a carbon source, so that the carbon source is saved.
c. Sludge collection and drying: and residual sludge generated in the zone B2 of the reactor is discharged to a sludge collecting and drying tank 12 through periodic sludge discharge. The sludge collecting and drying tank 12 returns the sludge leakage liquid to the zone 2 of the reactor B through a return pipe, and the dried sludge rich in phosphorus in the sludge collecting and drying tank can be periodically cleaned and recycled or treated by a sludge treatment plant (such as sintered ceramsite).
The detailed steps of the step a are as follows:
1. the primary sewage raw water enters the reactor A area 1 from the bottom, granular sludge is cultured in the bottom high biomass area, and the bottom water enters to promote the sludge granulation process, so that the aerobic granular sludge can be cultured quickly.
2. Stirring: homogenizing through a stirrer, and enhancing the adsorption and degradation of the granular sludge on organic matters in the sewage;
3. intermittent aeration: intermittent aeration is performed to complete biological nitrogen removal and organic matter removal, hydraulic shearing is formed by the aeration to promote sludge granulation, a chemical phosphorus removal process of the phosphorus removal composite filler is accelerated, a chelate produced by chemical phosphorus removal is used to further promote the sludge granulation, and an aerobic-anoxic-anaerobic layered microenvironment is easily formed by the granular sludge to realize synchronous nitrification and denitrification.
4. Controlling the selective pressure: the granular sludge with good sedimentation performance is left in the area 1 of the reactor A by controlling the selective pressure, and the light floc sludge which is not easy to settle and the mixed liquor are discharged into the area 2 of the reactor B for further treatment.
The primary water is fed from the bottom of the reactor A area 1 through the first water inlet pipe 3, so that the granular sludge is favorably adsorbed and condensed in a high biomass area at the bottom, then the low-speed anaerobic stirring of the first stirrer 10 is used for enhancing the adsorption and degradation of the granular sludge on the organic matters in the sewage, and then the denitrification and organic matter removal process is completed through intermittent aeration. The granulation is promoted by utilizing the hydraulic shear formed by aeration, the chemical phosphorus removal process of the phosphorus removal composite filler is accelerated, and the granulation of the sludge is further promoted by utilizing a chelate produced by the chemical phosphorus removal. The characteristic that the granular sludge is easy to form an aerobic-anoxic-anaerobic layered microenvironment to realize synchronous nitrification and denitrification is utilized, and the degradation of organic matters is accelerated. Under the condition of short hydraulic retention of the reactor A area 1, the purposes of efficiently removing organic matters, nitrogen and phosphorus are achieved. Granular sludge with good sedimentation performance is left in the zone 1 of the reactor A by controlling selective pressure, and flocculent sludge which is not easy to settle and mixed liquor enter the zone 2 of the reactor B through a connecting pipe.
The detailed steps of the step b are as follows:
1. water inflow: introducing the light floc sludge which is not easy to settle in the area 1 of the reactor A and the mixed liquor into an area 2 of the reactor B;
2. carbon source supplement: introducing raw sewage into a zone B2 of the reactor, and stirring and homogenizing by a stirrer;
3. reaction: intermittent aeration, namely completing denitrification, nitrification and secondary denitrification in stages;
4. standing: standing for precipitation, and separating sludge and supernatant.
The mixed liquid of the nitrate nitrogen sewage in the area 1 of the reactor A enters the area 2 of the reactor B, the raw sewage water is guided into the area 2 of the reactor B by the secondary inlet pipe 9, and the mixture is stirred and homogenized by the second stirrer 11. The carbon source in the sewage raw water is utilized for denitrification, so that the aims of denitrification and carbon source saving are fulfilled. The reactor B area 2 adopts a sequencing batch activated sludge process, integrates the functions of homogenization, primary sedimentation, biodegradation, secondary sedimentation and the like, and finishes the procedures of water inlet, reaction, sedimentation, water drainage, idling and the like in the reactor B area 2. The gas stripping is completed through a small amount of aeration, and the separation of sludge and supernatant is realized through an ideal standing and precipitating process, so that the effluent SS is ensured to reach the standard stably.
The utility model provides an equipment of good oxygen granule sludge sewage treatment process of two-stage sequencing batch reactor, distinguish 2 including reactor A district 1 and reactor B, reactor A district 1 is equipped with first inlet tube 3 and first composite filler 4, reactor B distinguishes 2 and is equipped with outlet pipe 5, be equipped with connecting pipe 6 between reactor A district 1 and the reactor B district 2, reactor A district 1 and reactor B district 2 all are equipped with aeration mechanism, can convenient efficient carry out sewage treatment, the treatment effect is good, the operation is simple, and convenient maintenance.
The reactor B area 2 is provided with a second composite packing 8. The dephosphorization efficiency in the zone 2 of the reactor B is increased by means of the second composite packing 8.
The reactor B area 2 is provided with a second water inlet pipe 9. The second water inlet pipe 9 utilizes raw sewage water for supplementing the carbon source in the zone B2 of the reactor, so that the carbon source can be saved.
The reactor A area 1 is provided with a first stirrer 10, and the first stirrer 10 performs low-speed anaerobic stirring to enhance the adsorption and degradation of organic matters in sewage by the granular sludge.
The reactor B area 2 is provided with a second stirrer 11, and the second stirrer 11 stirs and homogenizes.
Also comprises a sludge collecting and drying tank 12 which is connected with the B area 2 of the reactor. The excess sludge produced in the zone 2 of the reactor B is discharged to a sludge collecting and drying tank 12 through periodic sludge discharge. The sludge collection and drying tank 12 returns the sludge leakage liquid to the zone B2 of the reactor through a return pipe, and the dried sludge rich in phosphorus in the sludge collection and drying tank 12 can be periodically cleaned and recycled or treated by a sludge treatment plant (such as sintered ceramsite).
The aeration mechanism comprises an air pump 13, a one-way valve 14, an electromagnetic valve 15 and an aeration device 7, wherein the air pump 13 is connected with the one-way valve 14, the one-way valve 14 is connected with the electromagnetic valve 15, and the electromagnetic valve 15 is connected with the aeration device 7. Intermittent aeration realizes high-efficiency and quick sewage treatment.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1) the bottom water feeding mode is adopted, so that the sludge granulation process is promoted, and the aerobic granular sludge can be cultured quickly;
2) the aerobic granular sludge is beneficial to realizing synchronous nitrification and denitrification, two-stage water inlet saves carbon source and has high treatment efficiency; the settling speed is high, and the overlong hydraulic retention time is not needed; the sludge age is long, thereby being beneficial to sludge reduction;
3) the reaction in time is ideal plug flow, and the biochemical reaction has large push force; the precipitation is ideal standing precipitation, and the solid-liquid separation effect is good;
4) the intermittent operation saves energy consumption; the operation mode is flexible, and the denitrification effect is good;
5) the anaerobic environment, the anoxic environment and the aerobic environment are alternated, so that the sludge expansion is effectively prevented;
6) impact load resistance, high microbial activity of the reaction tank and strong sewage treatment capacity;
7) the facility has small floor area and simple and flexible process.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (7)
1. The utility model provides a two-stage sequencing batch reactor aerobic granule mud sewage treatment process's equipment which characterized in that: the device comprises a reactor A area and a reactor B area, wherein the reactor A area is provided with a first water inlet pipe and a first composite filler, the reactor B area is provided with a water outlet pipe, a connecting pipe is arranged between the reactor A area and the reactor B area, and the reactor A area and the reactor B area are both provided with an aeration mechanism.
2. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: and a second composite filler is arranged in the area B of the reactor.
3. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: and a second water inlet pipe is arranged in the area B of the reactor.
4. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: the reactor A area is provided with a first stirrer.
5. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: and a second stirrer is arranged in the area B of the reactor.
6. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: the sludge drying device further comprises a sludge collecting and drying tank, and the sludge collecting and drying tank is connected with the B area of the reactor.
7. The apparatus of a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process as claimed in claim 1, wherein: the aeration mechanism comprises an air pump, a one-way valve, an electromagnetic valve and an aeration device, wherein the air pump is connected with the one-way valve, the one-way valve is connected with the electromagnetic valve, and the electromagnetic valve is connected with the aeration device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939210A (en) * | 2021-02-06 | 2021-06-11 | 重庆大学 | Integrated sewage treatment device and method utilizing carbon capture and aerobic granular sludge |
| WO2021208367A1 (en) * | 2020-04-13 | 2021-10-21 | 浙江双林环境股份有限公司 | Two-stage sequencing batch reactor aerobic granular sludge sewage treatment process and device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208367A1 (en) * | 2020-04-13 | 2021-10-21 | 浙江双林环境股份有限公司 | Two-stage sequencing batch reactor aerobic granular sludge sewage treatment process and device |
| CN112939210A (en) * | 2021-02-06 | 2021-06-11 | 重庆大学 | Integrated sewage treatment device and method utilizing carbon capture and aerobic granular sludge |
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