CN113060824A - Method for regulating and controlling components in mixed liquid of HPB sewage treatment biochemical pool - Google Patents
Method for regulating and controlling components in mixed liquid of HPB sewage treatment biochemical pool Download PDFInfo
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- CN113060824A CN113060824A CN202110348175.1A CN202110348175A CN113060824A CN 113060824 A CN113060824 A CN 113060824A CN 202110348175 A CN202110348175 A CN 202110348175A CN 113060824 A CN113060824 A CN 113060824A
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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
- C02F3/006—Regulation methods for biological treatment
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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
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/085—Fluidized beds
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2833—Anaerobic digestion processes using fluidized bed reactors
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to HPB sewage treatment, in particular to a method for regulating and controlling components in mixed liquor of a biochemical pool for HPB sewage treatment, wherein the components comprise microorganisms and inorganic substances, and the method for regulating and controlling comprises the steps of conveying the mixed liquor in the biochemical pool to a secondary sedimentation pool; concentrating and clarifying in a secondary sedimentation tank, and discharging clear liquid to obtain bottom sludge; according to the set ratio of the microorganisms to the inorganic substances in the mixed liquid of the biochemical tank, separating a proper amount of the bottom sludge to recover the composite powder carrier and the microorganisms, and then returning the composite powder carrier and the microorganisms to the biochemical tank. According to the invention, the microorganism and the composite powder carrier are separated and recovered, and a proper amount of the composite powder carrier is added back to the biochemical pool, so that the purpose of regulating and controlling the ratio of the microorganism to the inorganic substance in the biochemical pool is realized, and on one hand, the method enables the content of the microorganism and the inorganic substance in the biochemical pool to be always kept in a set range, and improves the effect of synchronous nitrogen and phosphorus removal; on the other hand, the adding amount of the composite powder carrier can be reduced, and the biochemical treatment cost is reduced.
Description
Technical Field
The invention relates to HPB sewage treatment, in particular to a method for regulating and controlling components in mixed liquor of a biochemical pool for HPB sewage treatment.
Background
HPB (High Concentration Powder Carrier Biological Fluidized Bed, HPB for short) is a High Concentration Powder Carrier Biological Fluidized Bed, and a composite Powder Carrier is required to be put into a biochemical pool in the town sewage treatment process, wherein the composite Powder Carrier is formed by compounding Powder Carrier particles and alternative carbon source particles, and the main component of the composite Powder Carrier is inorganic matter. After the composite powder carrier is put into a biochemical pool, a growth platform and a substituted carbon source are mainly provided for the attached microorganisms. Due to the addition of a large amount of composite powder carriers, the proportion of microorganisms and inorganic substances in the system is always in the optimal range, so that a microbial system symbiotic with suspended growth and attached growth of double mud is successfully constructed in a biochemical pool, the biological diversity of the system and the abundance of attached growth microorganisms are improved, and the efficient nitrogen and phosphorus removal of the biochemical system is realized.
However, in the existing sewage treatment process, along with the progress of biochemical reaction in the biochemical tank, the composite powder carrier and attached microorganisms in the system run off along with sludge discharge, and the proportion of the microorganisms and inorganic substances is unbalanced, so that the nitrogen and phosphorus removal effect is not ideal.
Disclosure of Invention
Aiming at the problems, the invention provides a method for regulating and controlling components in mixed liquid of an HPB sewage treatment biochemical pool, which can improve the nitrogen and phosphorus removal effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for regulating and controlling components in a mixed liquid of an HPB sewage treatment biochemical pool, wherein the components comprise microorganisms and inorganic substances, and the method comprises the following steps:
(1) in the HPB sewage treatment process, the mixed liquid added with the composite powder carrier in the biochemical tank for biochemical reaction is conveyed to a secondary sedimentation tank;
(2) concentrating and clarifying in a secondary sedimentation tank, and discharging clear liquid to obtain bottom sludge;
(3) separating a proper amount of the bottom sludge according to the set ratio of microorganisms to inorganic substances in the mixed liquid of the biochemical pool to recover the composite powder carrier and the microorganisms;
(4) and returning the separated and recovered composite powder carrier and the microorganisms to the biochemical pool.
Preferably, the bottom of the secondary sedimentation tank is provided with a three-way valve, a bypass of the three-way valve is connected with a cyclone separator, and the composite powder carrier and the microorganisms are separated and recovered through the cyclone separator; the other bypass is used for bottom sludge backflow.
Preferably, the bottom sludge flowing into one bypass of the three-way valve is dispersed under the turbulent flow effect of the turbulator and then flows into the cyclone separator for separation.
Preferably, the bottom sludge flowing into the cyclone separator is swirled to cause the high-density substances to descend along the peripheral wall of the conical tube of the cyclone separator, the low-density substances to ascend along the center of the conical tube, and the descended high-density substances are returned to the biochemical tank.
Preferably, the high-density substance is an agglomerated microorganism, a microorganism attached to an inorganic substance, and a composite powder carrier to which the microorganism is attached.
Preferably, the air column is formed in the center of the cone to lift the low-density material.
Preferably, in the components, the microorganism accounts for 25-40% and the inorganic substance accounts for 60-75% by mass percent.
Preferably, the microorganisms are nitrifying bacteria, denitrifying bacteria, facultative bacteria and other functional bacteria.
According to the technical scheme, the microorganism and the composite powder carrier are separated and recovered, and the composite powder carrier is fed back to the biochemical pool in a proper amount, so that the purpose of regulating and controlling the ratio of the microorganism to the inorganic substance in the biochemical pool is realized, on one hand, the method enables the content of the microorganism and the inorganic substance in the biochemical pool to be always kept in a set range, and the effect of synchronous nitrogen and phosphorus removal is improved; on the other hand, the adding amount of the composite powder carrier can be reduced, and the biochemical treatment cost is reduced.
Detailed Description
The present invention will now be described in detail with reference to the following examples, which are illustrative of the present invention and are not to be construed as limiting the invention.
The invention provides a method for regulating and controlling components in mixed liquor of an HPB sewage treatment biochemical pool, wherein the components comprise microorganisms and inorganic substances, and the method comprises the following steps:
firstly, in the HPB sewage treatment process, a mixed solution which is added with a composite powder carrier in a biochemical tank for biochemical reaction is conveyed to a secondary sedimentation tank; the composite powder carrier is formed by compounding organic or inorganic carbon source powder and biological carrier powder, and specific components, content, preparation method and the like of the composite powder carrier can refer to patent patents previously issued by the applicant. As the organic or inorganic carbon source is used as the nutrient source of the microorganism, the carbon source can form dominant functional bacteria for nitrogen and phosphorus removal in the biochemical reaction process, such as nitrifying bacteria, denitrifying bacteria, facultative bacteria, other functional bacteria and the like.
Then, the clear liquid is discharged to obtain bottom sludge through the concentration and clarification effects of a secondary sedimentation tank; the bottom sludge contains inorganic substances, organic substances and the like, wherein the organic substances contain microorganisms and the like. Then, according to the ratio of the microorganism and the inorganic matter in the mixed liquid of the biochemical pool, separating a proper amount of the bottom sludge to separate and recover the composite powder carrier and the microorganism. In the invention, the proportion of the optimal design range of general microorganisms is 25-40% and the proportion of the optimal design range of inorganic substances is 60-75% in percentage by mass. In the implementation process, the ratio of the microorganisms to the inorganic substances can be kept to ensure that the effect of synchronous nitrogen and phosphorus removal is optimal. After the separation and recovery of a proper amount of bottom sludge are finished, the recovered composite powder carrier and the microorganisms are returned to the biochemical pool, so that the aim of regulating and controlling the ratio of the microorganisms to the inorganic substances in the biochemical pool is fulfilled, and the ratio of the microorganisms to the inorganic substance components in the biochemical pool is always kept in the optimal design range.
Specifically, the bottom of the secondary sedimentation tank is connected with a three-way valve, one bypass of the three-way valve is connected with a cyclone separator, and the other bypass is used for bottom sludge backflow. When the ratio of the microorganisms to the inorganic substances in the biochemical pool needs to be regulated, a bypass connected with a cyclone separator is opened, so that the sludge at the bottom enters the cyclone separator through the bypass, and then the microorganisms and the composite powder carrier are separated and recovered. In the implementation process, the microorganisms separated and recovered by the cyclone separator are nitrifying bacteria, denitrifying bacteria, facultative bacteria, other functional bacteria and the like, and the microorganisms can improve the nitrogen and phosphorus removal effect. Preferably, the bottom sludge flowing into the sludge conveying pipeline is dispersed under the turbulent flow action of the turbulator, namely the bottom sludge is dispersed according to low-density substances and high-density substances, so that the pre-separation effect is achieved, and the separation effect is improved; then, the dispersed low-density matter and high-density matter flow into the cyclone separator together for separation.
In the implementation process, the low-density substances and the high-density substances in the sludge flowing into the bottom of the cyclone separator descend along the peripheral wall of the conical cylinder of the cyclone separator under the action of cyclone, the low-density substances ascend along the center of the conical cylinder, and the descended high-density substances are returned to the biochemical pool. In the biochemical reaction process, part of microorganisms are agglomerated and grow under the action of a carbon source, part of microorganisms are attached to inorganic substances, and the rest of microorganisms are in a free state, so that the agglomerated microorganisms are obviously high in density, and the free microorganisms are low in density; the microorganisms adhered to the inorganic substance form a whole, and the density is also high. Therefore, under the cyclone effect of the cyclone separator, high-density substances can descend along the peripheral wall of the conical cylinder, so that the high-density substances are collected at the bottom of the cyclone separator and then are added into the biochemical tank, the low-density substances are lifted by the air column formed in the center of the conical cylinder, so that the low-density substances are collected at the top of the cyclone separator in a centralized manner, and the collected low-density substances do not enter the biochemical tank any more.
According to the invention, the density difference between organic matters and inorganic matters is utilized, and the characteristics of biochemical reaction are combined to separate and recover to obtain high-density microorganisms such as denitrifying bacteria, and the low-density phosphorus-removing bacteria are properly removed, so that the ratio of the microorganisms to the inorganic matters in the mixed liquid of the biochemical pool is always kept in a balanced state, and the synchronous denitrifying and phosphorus-removing effect is further improved.
Claims (8)
- A method for regulating and controlling components in mixed liquid of an HPB sewage treatment biochemical pool, wherein the components comprise microorganisms and inorganic substances, and the method is characterized by comprising the following steps of:(1) in the HPB sewage treatment process, the mixed liquid added with the composite powder carrier in the biochemical tank for biochemical reaction is conveyed to a secondary sedimentation tank;(2) concentrating and clarifying in a secondary sedimentation tank, and discharging clear liquid to obtain bottom sludge;(3) separating a proper amount of the bottom sludge according to the set ratio of microorganisms to inorganic substances in the mixed liquid of the biochemical pool to recover the composite powder carrier and the microorganisms;(4) and returning the separated and recovered composite powder carrier and the microorganisms to the biochemical pool.
- 2. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical pool according to claim 1, wherein the method comprises the following steps: the bottom of the secondary sedimentation tank is provided with a three-way valve, a bypass of the three-way valve is connected with a cyclone separator, and the composite powder carrier and the microorganisms are separated and recovered through the cyclone separator; the other bypass is used for bottom sludge backflow.
- 3. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical pool according to claim 2, wherein the method comprises the following steps: the sludge flowing into the bottom of one bypass of the three-way valve is firstly dispersed under the turbulent flow action of the turbulator and then flows into the cyclone separator for separation.
- 4. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical tank according to claim 3, wherein the method comprises the following steps: and under the action of cyclone, the high-density substances of the bottom sludge flowing into the cyclone separator descend along the peripheral wall of the conical cylinder of the cyclone separator, the low-density substances ascend along the center of the conical cylinder, and the descended high-density substances are returned to the biochemical tank.
- 5. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical tank according to claim 4, wherein the method comprises the following steps: the high-density substance is an agglomerated microorganism, a microorganism attached to an inorganic substance and a composite powder carrier to which the microorganism is attached.
- 6. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical tank according to claim 4, wherein the method comprises the following steps: the center of the cone forms an air column to lift the low-density substances.
- 7. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical pool according to any one of claims 1 to 6, wherein the method comprises the following steps: in the components, the mass percentage of the microorganism accounts for 25-40%, and the mass percentage of the inorganic substance accounts for 60-75%.
- 8. The method for regulating and controlling the components in the mixed liquid of the HPB sewage treatment biochemical pool according to claim 1, wherein the method comprises the following steps: the microorganism is nitrifying bacteria, denitrifying bacteria, facultative bacteria and other functional bacteria.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348175.1A CN113060824A (en) | 2021-03-31 | 2021-03-31 | Method for regulating and controlling components in mixed liquid of HPB sewage treatment biochemical pool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110348175.1A CN113060824A (en) | 2021-03-31 | 2021-03-31 | Method for regulating and controlling components in mixed liquid of HPB sewage treatment biochemical pool |
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| CN113060824A true CN113060824A (en) | 2021-07-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115140841A (en) * | 2022-05-24 | 2022-10-04 | 湖南五方环境科技研究院有限公司 | System and method for regulating and controlling sludge concentration of composite bioreactor |
| CN116621338A (en) * | 2023-07-26 | 2023-08-22 | 湖南三友环保科技有限公司 | Deep denitrification system and method for town sewage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867356A (en) * | 2019-02-20 | 2019-06-11 | 湖南三友环保科技股份有限公司 | A kind of high concentration powder carrier organism fluidized-bed process of novel process town sewage |
| CN110668558A (en) * | 2019-10-31 | 2020-01-10 | 同济大学 | Recovery system of composite powder carrier in HPB town sewage treatment |
-
2021
- 2021-03-31 CN CN202110348175.1A patent/CN113060824A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867356A (en) * | 2019-02-20 | 2019-06-11 | 湖南三友环保科技股份有限公司 | A kind of high concentration powder carrier organism fluidized-bed process of novel process town sewage |
| CN110668558A (en) * | 2019-10-31 | 2020-01-10 | 同济大学 | Recovery system of composite powder carrier in HPB town sewage treatment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115140841A (en) * | 2022-05-24 | 2022-10-04 | 湖南五方环境科技研究院有限公司 | System and method for regulating and controlling sludge concentration of composite bioreactor |
| CN116621338A (en) * | 2023-07-26 | 2023-08-22 | 湖南三友环保科技有限公司 | Deep denitrification system and method for town sewage |
| CN116621338B (en) * | 2023-07-26 | 2023-12-15 | 湖南三友环保科技有限公司 | Deep denitrification system and method for town sewage |
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Application publication date: 20210702 |