WO2021208367A1

WO2021208367A1 - Two-stage sequencing batch reactor aerobic granular sludge sewage treatment process and device

Info

Publication number: WO2021208367A1
Application number: PCT/CN2020/117688
Authority: WO
Inventors: 李军; 韦洪堂; 邱冲; 杨前进; 潘劲波
Original assignee: 浙江双林环境股份有限公司
Priority date: 2020-04-13
Filing date: 2020-09-25
Publication date: 2021-10-21
Also published as: CN111348748A

Abstract

A two-stage sequencing batch reactor aerobic granular sludge sewage treatment process, comprising the following steps: a. primary granular sludge sewage treatment: feeding primary sewage raw water into a zone A (1) of a reactor, and performing adsorptive degradation on sewage organic matter using aerobic granular sludge; b. sewage treatment using a secondary activated sludge process: introducing light flocculent sludge which is unlikely to settle in a zone A (1) of a reactor together with a mixed liquid into a zone B (2) of the reactor, introducing secondary sewage raw water into the zone B (2) of the reactor for supplementing a carbon source at the same time, using a sequencing batch reactor activated sludge process in the zone B (2) of the reactor for treatment, performing further denitrification and dephosphorization, and then standing for precipitation to achieve separation of sludge and a supernatant; and c. sludge collection and drying: discharging the residual sludge produced in the zone B (2) of the reactor to a sludge collection and drying tank by means of periodic sludge discharge. Also disclosed is a two-stage sequencing batch reactor aerobic granular sludge sewage treatment device.

Description

Two-stage sequential batch reactor aerobic granular sludge sewage treatment process and equipment

Technical field

The invention belongs to the technical field of rural and urban domestic sewage treatment, and particularly relates to a two-stage sequential batch reactor aerobic granular sludge sewage treatment process and equipment.

Background technique

In the field of rural sewage treatment, rural sewage has the characteristics of low carbon, high nitrogen and phosphorus, and large flow changes, which restrict the difficulty and cost of rural sewage treatment. The activated sludge method is a biological wastewater treatment technology with activated sludge microorganisms as the main body. The technology is to continuously mix and cultivate various microbial groups in sewage under artificially enhanced conditions to form activated sludge, and use the microorganisms in the activated sludge to decompose and remove organic pollutants in the sewage under suitable conditions. Then the sludge is separated, and the treated supernatant and excess sludge are discharged out of the system. SBR is the abbreviation of Sequential Batch Activated Sludge Process, which is an activated sludge process that operates in a sequence of intermittent water intake and intermittent aeration. Its main feature is orderliness and intermittent operation. The core of SBR technology is the SBR reaction tank, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation, and is completed in the pool. Processes such as water inflow, reaction, precipitation, drainage, and idleness. It is suitable for occasions with intermittent discharge and large changes in sewage flow.

Aerobic granular sludge technology is a new type of sewage treatment technology. It has the advantages of large biomass of granular sludge, long sludge age, low residual sludge output, fast particle settling speed, efficient sewage treatment, and can withstand higher organic loads. Features such as strong impact load, strong resistance to toxic and harmful effects. The formation mechanism of aerobic granular sludge is complex, including physical, chemical and biological interactions. Generally, the formation process is regarded as a phenomenon of organism aggregation formed by self-aggregation of microorganisms through a variety of mechanisms (extracellular polymer, filamentous bacteria skeleton, induced condensation nucleus, cation binding) under certain conditions such as fluid mechanics and selective pressure.

The traditional single-stage SBR granular sludge reactor has to achieve selective pressure, which often causes the problem of high SS in the effluent.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned technical problems in the prior art and provide a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process and equipment, which combines aerobic granular sludge and a sequential batch activated sludge process , It has the advantages and stability of bacteria and efficiency in sewage treatment. The process adopts intermittent water inflow and intermittent aeration to quickly cultivate granular sludge to improve the sewage treatment efficiency and stability of the system. The process adopts a two-stage water-intake method to save carbon source, and at the same time solves the problem of high SS that may be produced by granular sludge due to the fast settling speed. Ensure that the reactor has the characteristics of strong impact load resistance, high efficiency of pollutant removal, low residual sludge output, and thorough solid-liquid separation. The whole process does not introduce too many processing units, which not only has high processing efficiency, stable effluent up to 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 easy maintenance.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A two-stage sequencing batch reactor aerobic granular sludge sewage treatment process, which is characterized in that it comprises the following steps:

a. First-level granular sludge sewage treatment: the first-level sewage raw water enters the reactor A zone, and the aerobic granular sludge is used to adsorb and degrade the organic matter of the sewage. The aerobic granular sludge can be stabilized and denitrification can be enhanced by adding conditioned sludge fine powder. On the one hand, activated sludge aerobic absorption of phosphorus, and on the other hand, the chemical phosphorus removal effect is enhanced by the phosphorus removal composite filler in the reactor A zone, and the phosphorus removal sediment is used to induce coagulation nuclei and promote the sludge granulation process. For example, the iron chelate produced by chemical phosphorus removal (microbial population sensing effect, cell signaling molecule) provides condensation nuclei, etc. to jointly promote the granulation of aerobic sludge, form and control the selective pressure, and quickly cultivate aerobic granular pollution. mud. In this way, aerobic granular sludge is formed with large particle size, compact structure and coexistence of multiple microorganisms. The particles form an aerobic, anoxic and anaerobic microenvironment from the outside to the inside to make heterotrophic bacteria, nitrifying bacteria and denitrifying bacteria, etc. Activities in their respective suitable spaces are conducive to simultaneous nitrification and denitrification and short-range nitrification and denitrification. High-efficiency treatment and fast settlement speed.

b. Secondary activated sludge method sewage treatment: the light floc sludge that is not easy to settle in the reactor A zone is introduced into the reactor B zone together with the mixed liquid, and the secondary sewage raw water is introduced into the reactor B zone for use To supplement the carbon source, use the sequencing batch activated sludge process in the reactor B zone to further remove nitrogen and phosphorus, and then stand for precipitation to complete the separation of sludge and supernatant. The granular sludge in the reactor A zone may produce high effluent SS due to the fast settling speed, while the light sludge flocs in the reactor A zone can be completely separated from the light sludge in the reactor B zone, and the sewage can be introduced into the sewage at the same time. The raw water is used to supplement the carbon source and save the carbon source.

c. Sludge collection and drying: The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge. The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge. The sludge collection and drying tank returns the sludge leakage to the reactor B area through the return pipe. The phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or treated by the sludge treatment plant ( Such as: sintered ceramsite).

Further, the detailed steps of step a are:

1. The primary sewage raw water enters the reactor A at the bottom, and the granular sludge is quickly cultivated in the high biomass area at the bottom. The bottom influent promotes the sludge granulation process, which is beneficial to the rapid cultivation of aerobic granular sludge.

2. Stirring: homogenize with agitator to enhance the adsorption and degradation of organic matter in sewage by granular sludge;

3. Intermittent aeration: Intermittent aeration to complete biological denitrification and organic matter removal. At the same time, aeration is used to form hydraulic shear to promote sludge granulation, and to speed up the chemical phosphorus removal process of phosphorus removal composite fillers, and use chemical phosphorus removal products. The resulting chelate further promotes the granulation of sludge, and the granular sludge is used to easily form aerobic-anoxic-anaerobic stratified microenvironment to realize simultaneous nitrification and denitrification.

4. Control the selective pressure: by controlling the selective pressure in the reactor A zone, the granular sludge with good sedimentation performance is left, and the light floc sludge that is not easy to settle is discharged into the reactor B zone together with the mixed liquid for further processing .

The first-stage influent is fed from the bottom of the reactor A through the first inlet pipe, which is conducive to the adsorption and agglomeration of granular sludge at the bottom of the high-biomass zone, and then through the first agitator low-speed anaerobic stirring to enhance the effect of the granular sludge on the organic matter of the sewage The adsorption degradation, and then intermittent aeration to complete the denitrification and organic matter removal process. The hydraulic shear formed by aeration is used to promote granulation, and accelerate the chemical phosphorus removal process of the phosphorus removal composite filler, and use the chelate produced by chemical phosphorus removal to further promote the granulation of sludge. The use of granular sludge is easy to form aerobic-anoxia-anaerobic stratified microenvironment to realize the characteristics of simultaneous nitrification and denitrification, and accelerate the degradation of organic matter. In the case of shorter hydraulic retention in the reactor A zone, the purpose of high-efficiency removal of organic matter, nitrogen and phosphorus removal is achieved. By controlling the selective pressure in the reactor A zone, the granular sludge with good sedimentation performance is left, and the flocculent sludge that is not easy to settle together with the mixed liquid enters the reactor B zone through the connecting pipe.

Further, the detailed steps of step b are:

1. Water inlet: the light floc sludge that is not easy to settle in zone A of the reactor is introduced into zone B of the reactor together with the mixed liquid;

2. Supplementary carbon source: the raw sewage water is introduced into zone B of the reactor, which is stirred and homogenized by the agitator;

3. Reaction: intermittent aeration, complete denitrification, nitrification, secondary denitrification and other processes in stages;

4. Stand still: stand still to settle, sludge and supernatant are separated.

The nitrate-nitrogen sewage mixed liquid in zone A of the reactor enters zone B of the reactor, and the secondary influent water is introduced into zone B of the reactor through the second water inlet pipe, and the second agitator is used for stirring and homogenization. The carbon source in the raw sewage water is used for denitrification to achieve the purpose of denitrification and saving carbon sources. The reactor B zone adopts the sequential batch activated sludge method, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation. In the reactor B zone, processes such as water intake, reaction, precipitation, drainage, and idleness are completed. A small amount of aeration is used to complete the gas stripping. Through the ideal standing and sedimentation process, the sludge and the supernatant are separated to ensure that the effluent SS is stable and meets the standard.

A two-stage sequential batch reactor aerobic granular sludge sewage treatment process equipment, which is characterized in that it comprises a reactor A zone and a reactor B zone, and the reactor A zone is provided with a first water inlet pipe and a first composite filler , The reactor B zone is equipped with a water outlet pipe, the reactor A zone and the reactor B zone are equipped with a connecting pipe, and the reactor A zone and the reactor B zone are both equipped with an aeration mechanism, which can conveniently and efficiently carry out sewage treatment. The treatment effect is good, the operation is simple, and the maintenance is easy.

Further, a second composite packing is provided in the B zone of the reactor. The second composite packing improves the dephosphorization efficiency in the B zone of the reactor.

Furthermore, a second water inlet pipe is provided in the B zone of the reactor. The second water inlet pipe uses the raw sewage water to supplement the carbon source in the B zone of the reactor, which can save the carbon source.

Furthermore, the reactor A zone is provided with a first agitator, and the first agitator low-speed anaerobic stirring enhances the adsorption and degradation of the organic matter of the sewage by the granular sludge.

Further, a second stirrer is provided in the B zone of the reactor, and the second stirrer stirs and homogenizes.

Furthermore, it also includes a sludge collection and drying tank, which is connected to the reactor B zone. The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge. The sludge collection and drying tank returns the sludge leakage to the reactor B area through the return pipe. The phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or treated by the sludge treatment plant ( Such as: sintered ceramsite).

Further, the aeration mechanism includes an air pump, a one-way valve, an electromagnetic valve and an aeration device. 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 enables efficient and rapid sewage treatment.

The present invention has the following beneficial effects due to the adoption of the above technical scheme:

1) Adopt the bottom water inlet method to promote the sludge granulation process, which is conducive to the rapid cultivation of aerobic granular sludge;

2) Aerobic granular sludge is conducive to simultaneous nitrification and denitrification. The two-stage water inflow saves carbon sources and has high treatment efficiency; the sedimentation speed is fast and does not require excessively long hydraulic retention time; the long sludge age is conducive to sludge reduction;

3) In terms of time, the reaction is an ideal push flow, and the biochemical reaction has a large thrust; the precipitation is an ideal static precipitation, and the solid-liquid separation effect is good;

4) Intermittent operation, low energy consumption; flexible operation mode, good denitrification effect;

5) Alternating anaerobic-anoxic-aerobic environment can effectively prevent sludge expansion;

6) Impact load resistance, high microbial activity in the reaction tank, and strong sewage treatment capacity;

7) The facility occupies a small area and the process is simple and flexible.

Description of the drawings

The present invention will be further explained below in conjunction with the drawings:

Figure 1 is a schematic structural diagram of a two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process according to the present invention.

In the figure, 1- reactor A zone; 2- reactor B zone; 3- first water inlet pipe; 4- first composite packing; 5- water outlet pipe; 6-connecting pipe; 7-aeration device; 8-th Two composite packing; 9-second water inlet pipe; 10-first agitator; 11-second agitator; 12-sludge collection and drying tank; 13-air pump; 14-one-way valve; 15-solenoid valve.

Detailed ways

As shown in Figure 1, it is a two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process of the present invention, including the following steps:

a. First-level granular sludge sewage treatment: The first-level sewage raw water enters the reactor A zone 1, and the aerobic granular sludge is used to adsorb and degrade the organic matter of the sewage. The aerobic granular sludge can be stabilized and denitrification can be enhanced by adding conditioned sludge fine powder. On the one hand, the activated sludge is used to absorb phosphorus aerobic, on the other hand, the phosphorus removal composite filler in the reactor A zone 1 enhances the chemical phosphorus removal effect, and uses the phosphorus removal sediment to induce coagulation nuclei and promote the sludge granulation process. For example, the iron chelate produced by chemical phosphorus removal (microbial population sensing effect, cell signaling molecule) provides condensation nuclei, etc. to jointly promote the granulation of aerobic sludge, form and control the selective pressure, and quickly cultivate aerobic granular pollution. mud. In this way, aerobic granular sludge is formed with large particle size, compact structure and coexistence of multiple microorganisms. The particles form an aerobic, anoxic and anaerobic microenvironment from the outside to the inside to make heterotrophic bacteria, nitrifying bacteria and denitrifying bacteria, etc. Activities in their respective suitable spaces are conducive to simultaneous nitrification and denitrification and short-range nitrification and denitrification. High-efficiency treatment and fast settlement speed.

b. Secondary activated sludge wastewater treatment: the light floc sludge that is not easy to settle in reactor A zone 1 is introduced into reactor B zone 2 together with the mixed liquid, and secondary sewage is introduced into reactor B zone 2 at the same time The raw water is used to supplement the carbon source, and is processed by the sequencing batch activated sludge method in the reactor B zone 2, further denitrification and phosphorus removal, and then settles down to complete the separation of sludge and supernatant. The granular sludge in reactor A zone 1 may produce high effluent SS due to its fast settling speed. In reactor B zone 2, the light sludge flocs in reactor A zone 1 can be completely solid-liquid separated. Then import the raw sewage water to supplement the carbon source and save the carbon source.

c. Sludge collection and drying: The surplus sludge produced in zone 2 of the reactor B is discharged to the sludge collection and drying tank 12 through periodic sludge discharge. The sludge collection and drying tank 12 returns the sludge leakage to the reactor B zone 2 through the return pipe. The phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or used by the sludge treatment plant Treatment (such as: sintered ceramsite).

The detailed steps of step a are:

1. The primary sewage raw water enters at the bottom of the reactor A zone 1, where the granular sludge is cultivated in the high biomass area at the bottom, and the bottom influent promotes the process of sludge granulation, which is beneficial to the rapid cultivation of aerobic granular sludge.

4. Control the selective pressure: by controlling the selective pressure in the reactor A zone 1, the granular sludge with good sedimentation performance is left, and the light floc sludge that is not easy to settle is discharged into the reactor B zone 2 together with the mixed liquid. Further processing.

The first-stage influent is fed from the bottom of the reactor A zone 1 through the first inlet pipe 3, which is conducive to the adsorption and condensation of granular sludge in the high biomass area at the bottom, and then the first agitator 10 low-speed anaerobic stirring to enhance the granular sludge Adsorption and degradation of organic matter in sewage, and then intermittent aeration to complete the process of denitrification and organic matter removal. The hydraulic shear formed by aeration is used to promote granulation, and accelerate the chemical phosphorus removal process of the phosphorus removal composite filler, and use the chelate produced by chemical phosphorus removal to further promote the granulation of sludge. The use of granular sludge is easy to form aerobic-anoxia-anaerobic stratified microenvironment to realize the characteristics of simultaneous nitrification and denitrification, and accelerate the degradation of organic matter. In the case of shorter hydraulic retention in zone 1 of reactor A, the purpose of high-efficiency removal of organic matter, nitrogen and phosphorus removal is achieved. By controlling the selective pressure in the reactor A zone 1, the granular sludge with good sedimentation performance is left, and the flocculent sludge that is not easy to settle together with the mixed liquid enters the reactor B zone 2 through the connecting pipe.

The detailed steps of step b are:

1. Inlet water: the light floc sludge that is not easy to settle in the reactor A zone 1 is introduced into the reactor B zone 2 together with the mixed liquid;

2. Supplementary carbon source: Introduce raw sewage water into reactor B zone 2, and stir and homogenize by agitator;

3. Reaction: intermittent aeration to complete denitrification, nitrification and secondary denitrification in stages;

4. Stand still: stand still to settle, sludge and supernatant are separated.

The mixed solution of sewage with nitrate nitrogen in zone 1 of reactor A enters zone 2 of reactor B, and the secondary influent water is introduced into zone 2 of reactor B through the second inlet pipe 9, and the second agitator 11 performs stirring and homogenization. The carbon source in the raw sewage water is used for denitrification to achieve the purpose of denitrification and saving carbon sources. Reactor B zone 2 adopts the sequential batch activated sludge method, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation. In reactor B zone 2, water intake, reaction, precipitation, drainage, and idleness are completed. Process. A small amount of aeration is used to complete the gas stripping. Through the ideal standing and sedimentation process, the sludge and the supernatant are separated to ensure that the effluent SS is stable and meets the standard.

A two-stage sequential batch reactor aerobic granular sludge sewage treatment process equipment, including reactor A zone 1 and reactor B zone 2, reactor A zone 1 is provided with a first water inlet pipe 3 and a first composite packing 4. Reactor B zone 2 is equipped with a water outlet pipe 5, reactor A zone 1 and reactor B zone 2 are provided with a connecting pipe 6, and reactor A zone 1 and reactor B zone 2 are both equipped with aeration mechanisms. Sewage treatment can be carried out conveniently and efficiently, with good treatment effect, simple operation and easy maintenance.

The reactor B zone 2 is provided with a second composite packing 8. The second composite packing 8 improves the dephosphorization efficiency in the B zone 2 of the reactor.

The reactor B zone 2 is provided with a second water inlet pipe 9. The second water inlet pipe 9 uses the raw sewage water to supplement the carbon source in the reactor B zone 2, which can save the carbon source.

The reactor A zone 1 is provided with a first agitator 10, the first agitator 10 low-speed anaerobic stirring enhances the adsorption and degradation of the organic matter of the sewage by the granular sludge.

The reactor B zone 2 is provided with a second stirrer 11, which stirs and homogenizes.

It also includes a sludge collection and drying tank 12, which is connected to the reactor B zone 2. The surplus sludge produced in zone 2 of the reactor B is discharged to the sludge collection and drying tank 12 through periodic sludge discharge. The sludge collection and drying tank 12 returns the sludge leakage to the reactor B zone 2 through the return pipe. The phosphorus-rich dried sludge in the sludge collection and drying tank 12 can be cleaned and reused regularly or from the sludge. Treatment plant (such as: sintered ceramsite).

The aeration mechanism includes an air pump 13, a one-way valve 14, a solenoid valve 15, and an aeration device 7. The air pump 13 is connected to the one-way valve 14, the one-way valve 14 is connected to the solenoid valve 15, and the solenoid valve 15 is connected to the aeration device 7. Phase connection. Intermittent aeration enables efficient and rapid sewage treatment.

7) The facility occupies a small area and the process is simple and flexible.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims

A two-stage sequencing batch reactor aerobic granular sludge sewage treatment process, which is characterized in that it comprises the following steps:

a. First-level granular sludge sewage treatment: the first-level sewage raw water enters the reactor A zone, and the aerobic granular sludge is used to adsorb and degrade the organic matter of the sewage;

b. Secondary activated sludge method sewage treatment: the light floc sludge that is not easy to settle in the reactor A zone is introduced into the reactor B zone together with the mixed liquid, and the secondary sewage raw water is introduced into the reactor B zone for use Supplement the carbon source, adopt the sequencing batch activated sludge process in the reactor B zone, further remove nitrogen and phosphorus, and then stand for precipitation to complete the separation of sludge and supernatant;

c. Sludge collection and drying: The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge.
A two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process according to claim 1, characterized in that: the detailed steps of step a are:

1. Influent: the primary sewage raw water enters the reactor A zone at the bottom, and the granular sludge is cultivated in the high biomass area at the bottom;

2. Stirring: homogenize with agitator to enhance the adsorption and degradation of organic matter in sewage by granular sludge;

3. Intermittent aeration: Intermittent aeration to complete biological denitrification and organic matter removal. At the same time, aeration is used to form hydraulic shear to promote sludge granulation, and to speed up the chemical phosphorus removal process of phosphorus removal composite fillers, and use chemical phosphorus removal products. The resulting chelate further promotes the granulation of sludge, and the granular sludge is used to easily form aerobic-anoxic-anaerobic stratified microenvironment to realize simultaneous nitrification and denitrification;

4. Control the selective pressure: by controlling the selective pressure in the reactor A zone, the granular sludge with good sedimentation performance is left, and the light floc sludge that is not easy to settle is discharged into the reactor B zone together with the mixed liquid for further processing .
A two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process according to claim 1, wherein the detailed steps of step b are:

1. Water intake: the flocculent sludge that is not easy to settle in zone A of the reactor is introduced into zone B of the reactor together with the mixed liquid;

2. Supplementary carbon source: Introduce raw sewage water into zone B of the reactor, and stir and homogenize by agitator;

3. Reaction: intermittent aeration to complete the denitrification, nitrification and secondary denitrification processes in stages;

4. Stand still: stand still to settle, sludge and supernatant are separated.
A two-stage sequential batch reactor aerobic granular sludge wastewater treatment process equipment based on claim 1, characterized in that it comprises a reactor A zone and a reactor B zone, and the reactor A zone is provided with The first water inlet pipe and the first composite packing, the reactor B zone is provided with a water outlet pipe, the reactor A zone and the reactor B zone are provided with a connecting pipe, the reactor A zone and the The reactor B zone is equipped with an aeration mechanism.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that: the reactor B zone is provided with a second composite filler.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that: the reactor B zone is provided with a second water inlet pipe.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that: the reactor A zone is provided with a first agitator.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that: the reactor B zone is provided with a second agitator.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that it further comprises a sludge collection and drying tank, said sludge drying tank and said Reactor B zone is connected.
The equipment for a two-stage sequential batch reactor aerobic granular sludge sewage treatment process according to claim 4, characterized in that: the aeration mechanism comprises an air pump, a one-way valve, a solenoid valve and an aeration device, The air pump is connected with the one-way valve, the one-way valve is connected with the solenoid valve, and the solenoid valve is connected with the aeration device.