CN113149194A - Method for promoting two-stage sedimentation of continuous flow aerobic granular sludge - Google Patents
Method for promoting two-stage sedimentation of continuous flow aerobic granular sludge Download PDFInfo
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- CN113149194A CN113149194A CN202110493015.6A CN202110493015A CN113149194A CN 113149194 A CN113149194 A CN 113149194A CN 202110493015 A CN202110493015 A CN 202110493015A CN 113149194 A CN113149194 A CN 113149194A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention provides a method for promoting two-stage precipitation of continuous flow aerobic granular sludge, which comprises the following steps: the device is provided with a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank which are connected in sequence, wherein an inclined plate device is arranged in the inclined plate sedimentation tank; continuously flowing the sewage into a biochemical reaction tank, allowing the sludge-water mixed liquor after biochemical reaction to enter a granular sludge sedimentation tank, quickly settling the heavier sludge in the sludge-water mixed liquor into heavy sludge in the granular sludge sedimentation tank, and refluxing the heavy sludge to the biochemical reaction tank; light flocculent sludge in the mud-water mixed liquid flows into the inclined plate sedimentation tank, and the sludge after accelerated separation by the inclined plate device is collected at the lower part of the inclined plate sedimentation tank and discharged. The invention carries out the particle accumulation of aerobic sludge in a continuous flow mode, separates out heavier sludge through the arrangement of the particle sludge sedimentation tank and the inclined plate sedimentation tank, discharges light sludge floc, promotes the formation of aerobic particle sludge, and greatly shortens the light sludge separation time by utilizing the inclined plate device.
Description
Technical Field
The invention relates to a method for promoting aerobic granular sludge precipitation, in particular to a method for promoting continuous flow aerobic granular sludge two-stage precipitation, and belongs to the field of sewage treatment.
Background
The aerobic granular sludge technology is a novel wastewater treatment technology, has good settling property and high sludge concentration, can better bear high organic load, toxic and harmful substances, impact load and the like, and is gaining more attention in the field of sewage and wastewater treatment. The formation mechanism of the aerobic granular sludge is complex and comprises physical, chemical and biological interactions, and the like, and the general formation process can be regarded as an organism aggregation phenomenon formed by the self-immobilization of microorganisms under certain conditions of fluid dynamics, selective pressure and the like.
Current research has turned from the cultivation of aerobic granular sludge in batch activated sludge process (SBR) reactors to the formation of aerobic granular sludge in a continuous influent mode. For example, the invention of radial flow type double-zone sedimentation tank for continuous flow aerobic granular sludge (application No. 201610576528.2), AAO continuous flow aerobic granular sludge nitrogen and phosphorus removal process and system (application No. 201610708786.1), adjustable two-stage sedimentation tank aerobic granular sludge device (application No. 201610596867.7), continuous flow aerobic granular sludge culture and particle size control method and system (application No. 201710075411.0) and the like are novel solutions. However, the method for forming aerobic granular sludge by two-stage sedimentation by utilizing the inclined plate shallow layer principle to promote the clarification and the residual sludge separation process is not reported.
The current research shows that the aerobic granular sludge method is an extension improvement process of the activated sludge process widely applied at present, has good and stable total nitrogen removal effect, can obviously reduce the generation amount of residual sludge, but has relatively complex phosphorus removal mechanism, has a certain contradiction between the optimization condition of granular growth and the growth environment requirement of typical phosphorus-accumulating microorganisms, can not meet the water outlet requirement which is greatly improved at present and particularly has the total phosphorus content, and the granular sludge forming condition and the total nitrogen treatment effect can be influenced by the way of synchronously adding the chemical coagulant in the biological section. Subsequent treatment measures such as efficient precipitation, coagulation filtration and the like by means of a chemical coagulant process obviously increase the engineering investment cost, cause new sludge types and sludge generation points, and increase the working difficulty and cost of the next sludge treatment process section.
Disclosure of Invention
The invention aims to provide a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge so as to obtain higher final solid suspended matter removal rate and solve the problems in the background art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge comprises the following steps:
(1) the device is provided with a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank which are connected in sequence, wherein an inclined plate device is arranged in the inclined plate sedimentation tank;
(2) continuously flowing the sewage into a biochemical reaction tank, allowing the sludge-water mixed liquor after biochemical reaction to enter a granular sludge sedimentation tank, quickly settling the heavier sludge in the sludge-water mixed liquor into heavy sludge in the granular sludge sedimentation tank, and refluxing the heavy sludge to the biochemical reaction tank;
(3) and (3) making the lighter flocculent sludge in the sludge-water mixed liquid in the step (2) flow into the inclined plate sedimentation tank, and collecting the sludge subjected to accelerated separation by the inclined plate device at the lower part of the inclined plate sedimentation tank for discharge.
Preferably, in the step (1), the inclined plate device is arranged in the middle of the inclined plate sedimentation tank.
Preferably, in the step (1), the inclined plate device comprises a plurality of inclined plates arranged in parallel.
Preferably, the inclined plate is an engineering plastic plate or a stainless steel plate.
Preferably, the inclined plate is a polypropylene plate.
Preferably, in the step (1), the inclined plate device comprises a plurality of inclined tubes arranged in parallel.
Preferably, in the step (2), a sludge return pipe communicated with the biochemical reaction tank is arranged at the bottom of the granular sludge sedimentation tank.
Preferably, in the step (3), a chemical adding device communicated to the front end of the inclined plate sedimentation tank is arranged outside the inclined plate sedimentation tank, and when light flocculent sludge in the sludge-water mixed liquid in the step (2) flows into the inclined plate sedimentation tank, coagulant is added to the front end of the inclined plate sedimentation tank through the chemical adding device.
The invention has the beneficial effects that:
the invention relates to a method for promoting continuous flow aerobic granular sludge two-stage sedimentation, which is characterized in that aerobic sludge granules are accumulated in a continuous flow mode, heavier sludge is separated through the arrangement of a granular sludge sedimentation tank and an inclined plate sedimentation tank, light sludge floc is discharged, and the formation of aerobic granular sludge is promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the process of the present invention;
fig. 2 is a schematic diagram of the system operation of the present invention.
In the figure: 1. the device comprises a biochemical reaction tank, a granular sludge sedimentation tank, a sloping plate sedimentation tank, a system water inlet, a system water outlet, a sludge return pipe, a residual sludge discharge port, a medicament adding port, a medicament mixing area, a system water inlet, a system water outlet, a biochemical reaction tank, a granular sludge sedimentation tank, a system water outlet, a biochemical reaction tank, a particle sludge settling tank, a particle sludge, a.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.
Example 1:
a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge as shown in fig. 1, comprising the steps of:
(1) the device is provided with a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank which are connected in sequence, wherein an inclined plate device is arranged in the inclined plate sedimentation tank;
(2) continuously flowing the sewage into a biochemical reaction tank, allowing the sludge-water mixed liquor after biochemical reaction to enter a granular sludge sedimentation tank, quickly settling the heavier sludge in the sludge-water mixed liquor into heavy sludge in the granular sludge sedimentation tank, and refluxing the heavy sludge to the biochemical reaction tank;
(3) and (3) making the lighter flocculent sludge in the sludge-water mixed liquid in the step (2) flow into the inclined plate sedimentation tank, and collecting the sludge subjected to accelerated separation by the inclined plate device at the lower part of the inclined plate sedimentation tank for discharge.
Through the technical scheme, the aerobic sludge is subjected to particle accumulation in a continuous flow mode, heavy sludge is separated through the arrangement of the particle sludge sedimentation tank and the inclined plate sedimentation tank, light sludge floc is discharged, and the formation of aerobic particle sludge is promoted. The inclined plate device arranged in the inclined plate sedimentation tank is utilized, so that the light sludge separation time is greatly shortened, the hydraulic load of a sedimentation area is increased, and the floor area is reduced. The inclined plate device has no transmission part, and the process flow is simple, economic and energy-saving.
Example 2:
a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge comprises the following steps:
(1) the device is provided with a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank which are connected in sequence, wherein an inclined plate device is arranged in the inclined plate sedimentation tank;
(2) enabling sewage to continuously flow into a biochemical reaction tank, enabling sludge-water mixed liquor after biochemical reaction to enter a granular sludge sedimentation tank, wherein a sludge return pipe communicated to the biochemical reaction tank is arranged at the bottom of the granular sludge sedimentation tank, and enabling heavier sludge in the sludge-water mixed liquor to be quickly precipitated into heavy sludge in the granular sludge sedimentation tank and enabling the heavy sludge to return to the biochemical reaction tank;
(3) and (3) enabling the light flocculent sludge in the mud-water mixed liquid in the step (2) to flow into the inclined plate sedimentation tank, arranging a medicament adding device communicated to the front end of the inclined plate sedimentation tank outside the inclined plate sedimentation tank, adding a coagulant into the front end of the inclined plate sedimentation tank through the medicament adding device, and collecting the sludge subjected to accelerated separation by the inclined plate device at the lower part of the inclined plate sedimentation tank for discharge.
The system for promoting continuous flow aerobic granular sludge two-stage sedimentation comprises a biochemical reaction tank 1, a granular sludge sedimentation tank 2 and an inclined plate sedimentation tank 3 which are sequentially arranged, wherein a system water inlet 4 is formed in the biochemical reaction tank, a system water outlet 5 is formed in the inclined plate sedimentation tank, a sludge return pipe 6 communicated with the biochemical reaction tank is formed in the bottom of the granular sludge sedimentation tank, and a residual sludge discharge port 7 for discharging system residual sludge is formed in the bottom of the inclined plate sedimentation tank. The inclined plate sedimentation tank is externally provided with a medicament adding device 11, the top of the inclined plate sedimentation tank is provided with a medicament adding port 8, the medicament adding device is communicated with the medicament adding port, a medicament mixing area 9 is arranged below the medicament adding port and used for mixing reaction of medicament and mud-water mixed liquid, and the middle of the inclined plate sedimentation tank is provided with an inclined plate device 10.
The swash plate device includes a plurality of swash plates of parallel arrangement. It should be noted that the inclined plate device is not limited to include an inclined plate, and inclined pipes arranged in parallel may be used according to the process requirements. The sloping plate is a polypropylene plate, and it should be noted that the sloping plate is not limited to the polypropylene plate, and an engineering plastic plate or a stainless steel plate can be adopted according to the process requirements.
Through the technical scheme, the aerobic sludge is subjected to particle accumulation in a continuous flow mode, heavy sludge is separated through the arrangement of the particle sludge sedimentation tank and the inclined plate sedimentation tank, light sludge floc is discharged, and the formation of aerobic particle sludge is promoted. The inclined plate device arranged in the inclined plate sedimentation tank is utilized, so that the light sludge separation time is greatly shortened, the hydraulic load of a sedimentation area is increased, and the floor area is reduced. The inclined plate device has no transmission part, and the process flow is simple, economic and energy-saving. In addition, because the excess sludge is separately precipitated and discharged in the inclined plate sedimentation tank, the chemical sludge generated by the drug adding device can be directly discharged out of the system along with the separately precipitated excess sludge, the sludge and the sewage containing the excess chemical agent cannot flow back to the preposed biological reaction system, so that no negative influence is caused on the preposed biological reaction system, and only one excess sludge generating point is arranged in the whole scheme, thereby being convenient for management and operation.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A method for promoting two-stage sedimentation of continuous flow aerobic granular sludge is characterized in that: the method comprises the following steps:
(1) the device is provided with a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank which are connected in sequence, wherein an inclined plate device is arranged in the inclined plate sedimentation tank;
(2) continuously flowing the sewage into a biochemical reaction tank, allowing the sludge-water mixed liquor after biochemical reaction to enter a granular sludge sedimentation tank, quickly settling the heavier sludge in the sludge-water mixed liquor into heavy sludge in the granular sludge sedimentation tank, and refluxing the heavy sludge to the biochemical reaction tank;
(3) and (3) making the lighter flocculent sludge in the sludge-water mixed liquid in the step (2) flow into the inclined plate sedimentation tank, and collecting the sludge subjected to accelerated separation by the inclined plate device at the lower part of the inclined plate sedimentation tank for discharge.
2. The method for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to claim 1, wherein the method comprises the following steps: in the step (1), the inclined plate device is arranged in the middle of the inclined plate sedimentation tank.
3. The method for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to claim 1, wherein the method comprises the following steps: in the step (1), the inclined plate device comprises a plurality of inclined plates which are arranged in parallel.
4. A method for promoting two-stage precipitation of a continuous flow aerobic granular sludge according to claim 3, wherein: the sloping plate is an engineering plastic plate or a stainless steel plate.
5. A method for promoting two-stage precipitation of a continuous flow aerobic granular sludge according to claim 3, wherein: the sloping plate is a polypropylene plate.
6. The method for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to claim 1, wherein the method comprises the following steps: in the step (1), the inclined plate device comprises a plurality of inclined pipes which are arranged in parallel.
7. The method for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to claim 1, wherein the method comprises the following steps: in the step (2), a sludge return pipe communicated to the biochemical reaction tank is arranged at the bottom of the granular sludge sedimentation tank.
8. The method for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to claim 1, wherein the method comprises the following steps: and (3) a chemical adding device communicated to the front end of the inclined plate sedimentation tank is arranged outside the inclined plate sedimentation tank, and coagulant is added to the front end of the inclined plate sedimentation tank through the chemical adding device when light flocculent sludge in the sludge-water mixed liquid in the step (2) flows into the inclined plate sedimentation tank.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110493015.6A CN113149194A (en) | 2021-05-07 | 2021-05-07 | Method for promoting two-stage sedimentation of continuous flow aerobic granular sludge |
| EP22798671.8A EP4317087A4 (en) | 2021-05-07 | 2022-05-06 | Method and system for promoting two-stage sedimentation of aerobic granular sludge in continuous flow |
| PCT/CN2022/091329 WO2022233331A1 (en) | 2021-05-07 | 2022-05-06 | Method and system for promoting two-stage sedimentation of aerobic granular sludge in continuous flow |
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| CN202110493015.6A CN113149194A (en) | 2021-05-07 | 2021-05-07 | Method for promoting two-stage sedimentation of continuous flow aerobic granular sludge |
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| CN113149194A true CN113149194A (en) | 2021-07-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022233331A1 (en) * | 2021-05-07 | 2022-11-10 | 艾柯环保技术(杭州)有限公司 | Method and system for promoting two-stage sedimentation of aerobic granular sludge in continuous flow |
| CN117209053A (en) * | 2023-11-08 | 2023-12-12 | 清控环境(北京)有限公司 | Embedded aeration precipitation integrated self-coagulation activated sludge biochemical reactor |
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| CN117209053A (en) * | 2023-11-08 | 2023-12-12 | 清控环境(北京)有限公司 | Embedded aeration precipitation integrated self-coagulation activated sludge biochemical reactor |
| CN117209053B (en) * | 2023-11-08 | 2024-01-30 | 清控环境(北京)有限公司 | Embedded aeration precipitation integrated self-coagulation activated sludge biochemical reactor |
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