CN112429915A - Combined overflow sewage stage separation reinforced biological treatment process - Google Patents
Combined overflow sewage stage separation reinforced biological treatment process Download PDFInfo
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- CN112429915A CN112429915A CN202011322291.8A CN202011322291A CN112429915A CN 112429915 A CN112429915 A CN 112429915A CN 202011322291 A CN202011322291 A CN 202011322291A CN 112429915 A CN112429915 A CN 112429915A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/14—NH3-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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a combined overflow sewage stage separation reinforced biological treatment process, which comprises the following steps: pre-treating; the pretreated combined overflow sewage enters a cyclone classification separator, is separated by the separator, a separated mud-sand mixed solution enters a mud storage tank, the separated overflow sewage containing suspended matters directly enters a biological enhanced treatment tank, the separated overflow sewage enters a regulation tank and then enters a biological enhanced treatment tank, and the effluent of the biological enhanced treatment tank enters a sedimentation tank; solid-liquid separation in a sedimentation tank; sewage discharged from the sedimentation tank enters a coagulation reaction tank, and effluent from the coagulation reaction tank enters a filter tank; and discharging after filtering. The cyclone classification separator is used for separating inorganic silt, organic suspended matters and sewage in combined overflow sewage, and ensures that the concentration of main pollutants in effluent reaches the IV-class standard of surface water.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a combined overflow sewage classification and separation reinforced biological treatment process.
Background
In recent years, with the continuous promotion of water pollution treatment engineering measures, point source pollution in dry seasons of cities is effectively controlled gradually, but the problems of black and odorous water bodies and water environments of the cities are still not improved obviously. At present, most municipal drainage pipe networks belong to a combined system, and in rainy days, a large amount of mixed rain sewage overflows to a receiving water body due to the limitation of the conveying capacity of a closure pipeline and the treatment capacity of a sewage plant, so that the urban drainage pipe networks become the main cause of black and odorous urban water bodies. How to effectively control the overflow pollution of urban combined-flow pipelines becomes the focus of urban water environment quality improvement.
According to the standard reaching requirement of urban water environment water body, the effluent standard after combined system overflow pollution treatment generally requires that main pollutants reach the IV-class standard of surface water, namely CODCrReaching 30 mg/l; the ammonia nitrogen reaches 1.5mg/L (2.5 mg/L); the total phosphorus reaches 0.3 mg/L. Because the overflow sewage has the characteristics of obvious influence by rainfall, large fluctuation of water quality and quantity, high concentration of suspended matters and the like, the conventional municipal sewage plant treatment process and the initial rainwater storage and regulation process are difficult to realize stable standard reaching.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a combined overflow sewage stage separation reinforced biological treatment process.
The purpose of the invention can be realized by the following technical scheme:
a combined overflow sewage fractionation reinforced biological treatment process comprises the following steps:
(1) pretreating the combined overflow sewage;
(2) the pretreated combined sewage enters a cyclone classification separator and is separated into a mud-sand mixed solution with a larger specific gravity, overflow sewage containing suspended matters with a lighter specific gravity and overflow sewage;
(3) the cyclone separator separates sediment mixed liquid and enters a sludge storage tank, separated overflow sewage containing suspended matters directly enters a biological enhanced treatment tank, the separated overflow sewage enters a regulation tank, the effluent of the regulation tank enters the biological enhanced treatment tank, and COD in sewage is removedcrAmmonia nitrogen;
(4) the effluent of the biological strengthening treatment tank enters a sedimentation tank to realize solid-liquid separation, and the precipitated sludge is discharged to a sludge storage tank as excess sludge;
(5) and the sewage discharged from the sedimentation tank enters a coagulation reaction tank for chemical phosphorus removal, and the effluent from the coagulation reaction tank enters a filter tank for further removing SS (Suspended solids) and then is discharged.
The pretreatment step is that the sewage passes through a grating to remove larger floating objects and/or suspended substances, such as fibers and hair.
The cyclone classifier controls the inflow velocity through a variable frequency centrifugal pump to carry out three-stage separation of inorganic silt, organic suspended matters and sewage.
And the regulation and storage tank regulates and stores the combined system sewage water quantity in the rainfall period.
The biological strengthening treatment tank degrades COD in the sewage through aeration and oxygenationcrAnd ammonia nitrogen.
And the coagulation reaction tank is used for removing TP (Total phosphorus) by adding a phosphorus removal agent.
The invention has the beneficial effects that: the invention arranges cyclone grading separators at the front ends of the storage tank and the biological strengthening treatment tank for separating inorganic silt, organic suspended matters and sewage. Through the effective separation of the mud and sand, the impact on a biochemical system after a large amount of mud and sand enters the regulation pool and the biological strengthening treatment pool is avoided. Through the effective separation of organic suspended matter and sewage, reduce the organic suspended matter volume that gets into in the regulation pond on the one hand, reduce the desilting frequency in regulation pond, improve regulation pond utilization efficiency, on the other hand makes organic suspended matter can get into biological enhanced treatment pond, improves biological enhanced treatment pond nutrient concentration and biomass, ensures CODcrAnd the removal effect of ammonia nitrogen pollutants; combines the chemical phosphorus removal of the coagulation reaction tank and canEnsuring that the concentration of main pollutants in the effluent reaches the IV-class standard of surface water.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
As shown in FIG. 1, a combined overflow sewage fractionation reinforced biological treatment system comprises the following structures:
the treatment system comprises a grating, a cyclone classification separator, a regulation and storage tank, a biological strengthening treatment tank, a sludge storage tank, a sedimentation tank, a coagulation reaction tank and a filter tank. The confluence system overflow sewage is entered through the water inlet of the grating, the water outlet of the grating is communicated with the water inlet of the cyclone classifier, the outlet of the cyclone classifier is respectively communicated with the water inlet of the regulation pool, the water inlet of the biological strengthening treatment pool and the inlet of the sludge storage pool, the water inlet of the biological strengthening treatment pool is also communicated with the water outlet of the regulation pool, the water outlet of the biological strengthening treatment pool is communicated with the water inlet of the sedimentation pool, the outlet of the sedimentation pool is respectively communicated with the water inlet of the coagulation reaction pool and the inlet of the sludge storage pool, the water outlet of the coagulation reaction pool is communicated with the water inlet of the filter pool, and the treated water flows out through the water outlet of the filter pool.
The treatment process of the combined overflow sewage stage separation reinforced biological treatment system comprises the following steps:
1. the combined overflow sewage is pretreated by a grating to remove suspended matters with larger volume, so that the stability of the subsequent process is ensured;
2. and (3) the pretreated sewage enters a cyclone classification separator, under the action of a gravity and centrifugal force composite force field, inorganic silt with higher specific gravity in the sewage is discharged to a silt storage tank through an outlet at the bottom of the cyclone classification separator, and the part of silt and residual sludge are dewatered. Organic suspended matters with light specific gravity in the sewage form internal spiral upward movement with the sewage in the separator and overflow from the primary overflow port, and the overflowed mixed liquid directly enters the biological enhanced treatment tank and is generated in the biological enhanced treatment tankThe material film provides necessary organic nutrient and is degraded by microorganism to remove CODcrAnd ammonia nitrogen. The combined overflow sewage quantity is continuously increased along with the rainfall process, the sewage with relatively less suspended matter content overflows from the secondary overflow port, the overflowing sewage enters the regulation and storage tank, and is discharged into the biological enhanced treatment tank after regulation and storage, so that COD (chemical oxygen demand) is removedcrAnd ammonia nitrogen;
3. the effluent of the biological strengthening treatment tank enters a sedimentation tank for solid-liquid separation, and the precipitated sludge is discharged to a sludge storage tank as excess sludge;
4. sewage discharged from the sedimentation tank enters a coagulation reaction tank, and a chemical phosphorus removal agent is added for chemical phosphorus removal; the effluent enters a filter tank to filter metal phosphorus compound flocs generated in the coagulation reaction tank to remove total phosphorus; and the filter tank discharges the effluent after filtering.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (7)
1. A combined overflow sewage fractionation reinforced biological treatment process is characterized by comprising the following steps:
(1) pretreating the combined overflow sewage;
(2) the pretreated combined overflow sewage enters a cyclone classifier to be separated into a mud-sand mixed solution with a larger specific gravity, overflow sewage containing suspended matters with a lighter specific gravity and overflow sewage;
(3) the mud-sand mixed liquid separated by the cyclone classifier enters a mud storage tank, the separated overflow sewage containing suspended matters directly enters a biological enhanced treatment tank, the separated overflow sewage enters a regulation tank, the effluent of the regulation tank enters the biological enhanced treatment tank, and COD in the sewage is removedcrAmmonia nitrogen;
(4) the effluent of the biological strengthening treatment tank enters a sedimentation tank to realize solid-liquid separation, and the precipitated sludge is discharged to a sludge storage tank as excess sludge;
(5) and (3) enabling sewage discharged from the sedimentation tank to enter a coagulation reaction tank for chemical phosphorus removal, and enabling effluent from the coagulation reaction tank to enter a filter tank for further SS removal and then discharging.
2. The combined overflow sewage fractionation reinforced biological treatment process according to claim 1, wherein the pretreatment step is to remove larger floating materials and/or suspended materials from the sewage by a grid.
3. The combined overflow sewage fractionation reinforced biological treatment process according to claim 2, wherein the larger floaters and/or suspended matter are fibers or hairs.
4. The combined overflow sewage stage separation enhanced biological treatment process as claimed in claim 1, wherein the cyclone stage separator controls the inflow velocity through a variable frequency centrifugal pump to perform three-stage separation of inorganic silt, organic suspended matters and sewage.
5. The combined overflow sewage fractionation reinforced biological treatment process as claimed in claim 1, wherein the regulation tank regulates the combined overflow sewage amount in a rainfall period.
6. The combined overflow sewage fractionation and enhanced biological treatment process as claimed in claim 1, wherein the biological enhanced treatment tank is used for degrading COD in sewage by aeration and oxygenationcrAnd ammonia nitrogen.
7. The combined overflow sewage fractionation reinforced biological treatment process as claimed in claim 1, wherein the coagulation reaction tank removes TP by adding a phosphorus removal agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011322291.8A CN112429915A (en) | 2020-11-23 | 2020-11-23 | Combined overflow sewage stage separation reinforced biological treatment process |
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| CN202011322291.8A CN112429915A (en) | 2020-11-23 | 2020-11-23 | Combined overflow sewage stage separation reinforced biological treatment process |
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| CN112429915A true CN112429915A (en) | 2021-03-02 |
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| CN202011322291.8A Pending CN112429915A (en) | 2020-11-23 | 2020-11-23 | Combined overflow sewage stage separation reinforced biological treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198829A (en) * | 2021-04-28 | 2021-08-03 | 昆山元魁机电工程有限公司 | Dry film slag treatment and discharge system |
| CN114105334A (en) * | 2021-11-19 | 2022-03-01 | 河南同生环境工程有限公司 | Treatment method for filtering fine silt in urban sewage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410167A (en) * | 2002-11-29 | 2003-04-16 | 清华大学 | Multifunctional composite type solid-liquid cyclone separator |
| CN107555733A (en) * | 2017-10-31 | 2018-01-09 | 安徽利和水务有限公司 | A kind of sewage water treatment method |
-
2020
- 2020-11-23 CN CN202011322291.8A patent/CN112429915A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410167A (en) * | 2002-11-29 | 2003-04-16 | 清华大学 | Multifunctional composite type solid-liquid cyclone separator |
| CN107555733A (en) * | 2017-10-31 | 2018-01-09 | 安徽利和水务有限公司 | A kind of sewage water treatment method |
Non-Patent Citations (2)
| Title |
|---|
| 王文亮等: "基于模型模拟的合流制溢流调蓄与处理设施规模设计方法探讨", 《给水排水》 * |
| 马倩倩等: "旋流分离器在合流制溢流污染控制中的应用进展", 《绿色科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198829A (en) * | 2021-04-28 | 2021-08-03 | 昆山元魁机电工程有限公司 | Dry film slag treatment and discharge system |
| CN114105334A (en) * | 2021-11-19 | 2022-03-01 | 河南同生环境工程有限公司 | Treatment method for filtering fine silt in urban sewage |
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