CN115231784A - Sewage dephosphorization integrated device based on phosphorus is retrieved - Google Patents
Sewage dephosphorization integrated device based on phosphorus is retrieved Download PDFInfo
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- CN115231784A CN115231784A CN202211162043.0A CN202211162043A CN115231784A CN 115231784 A CN115231784 A CN 115231784A CN 202211162043 A CN202211162043 A CN 202211162043A CN 115231784 A CN115231784 A CN 115231784A
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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
- 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
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
Abstract
The invention provides a sewage dephosphorization integrated device based on phosphorus recovery, which comprises an aeration zone, a first precipitation zone, a phosphorus removal zone, a dosing zone and a second precipitation zone, wherein the aeration zone is provided with a first settling zone; the aeration zone is provided with a first sewage pipe communicated with the first sedimentation zone, the first sedimentation zone is provided with a sludge pipe communicated with the dephosphorization zone, the dephosphorization zone is provided with a second sewage pipe communicated with the dosing zone, the dosing zone is provided with a third sewage pipe communicated with the second sedimentation zone, and the second sedimentation zone is provided with a dephosphorization water return pipe communicated with the aeration zone; the dephosphorization zone is provided with a sludge return pipe which is communicated with the aeration zone. The integrated device combines chemical phosphorus removal and biological phosphorus removal, improves the sewage phosphorus removal effect, simultaneously recovers and utilizes phosphorus in sludge, and has the advantages of compact layout, convenient operation, good removal effect, synchronous nitrogen and phosphorus removal and organic matter removal.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage dephosphorization integrated device based on phosphorus recovery.
Background
The phosphorus in the sewage is partially derived from chemical fertilizers and agricultural wastes. The use of phosphorus-containing detergents in large quantities in daily life also significantly increases the phosphorus content in domestic sewage. The waste water discharged from chemical industry, dye and textile printing and dyeing, pesticide, medicine and medical treatment and food industries often contains organic phosphorus compounds. At present, organophosphorus pesticides widely used at home and abroad have great harm to marine organisms, and excessive phosphorus exceeds the self-cleaning capacity of soil, so that the soil is badly changed.
More seriously, the harmful substances poison air and water, are absorbed by plants, reduce the biological quality of agricultural and sideline products, and cause residual toxicity to be transmitted through plant chains and finally endanger human life and health. The excessive phosphorus has great harm to the water body, and causes eutrophication of the water body. For inducing water eutrophication, the action of phosphorus is far greater than that of nitrogen.
At present, the method for removing phosphorus from sewage mainly comprises biological phosphorus removal and chemical phosphorus removal, and has three main problems, namely poor phosphorus removal effect and unqualified phosphorus content in effluent; secondly, one method is independently used for removing phosphorus, so that the cost is high; and thirdly, the removal of nitrogen and organic matters cannot be considered at the same time.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sewage dephosphorization integrated device based on phosphorus recovery, which comprises an aeration zone, a first sedimentation zone, a phosphorus removal zone, a dosing zone and a second sedimentation zone; the aeration zone is provided with a water inlet, and the first sedimentation zone is provided with a water outlet; the aeration zone is provided with a first sewage pipe communicated with the first sedimentation zone, the first sedimentation zone is provided with a sludge pipe communicated with the dephosphorization zone, the dephosphorization zone is provided with a second sewage pipe communicated with the dosing zone, the dosing zone is provided with a third sewage pipe communicated with the second sedimentation zone, and the second sedimentation zone is provided with a dephosphorization water return pipe communicated with the aeration zone; the phosphorus removal zone is provided with a sludge return pipe which is communicated with the aeration zone, and the second sedimentation zone is provided with a sludge outlet.
Specifically, the aeration zone adopts a water inlet mode of bottom inlet and top outlet, and is used for taking up phosphorus by utilizing phosphorus accumulating bacteria, removing organic matters and simultaneously generating nitrification.
Specifically, the phosphorus-containing sewage of water inlet gets into the aeration district, the supernatant of second sedimentation district passes through dephosphorization water back flow gets into the aeration district, the dephosphorization mud that removes the phosphorus district passes through the mud back flow flows back to the aeration district, the dephosphorization mud contains the phosphorus-accumulating bacteria.
Specifically, the phosphorus removal zone is an anaerobic zone, phosphorus-containing sludge in the first precipitation zone enters the phosphorus removal zone through the sludge pipe, phosphorus is released in an anaerobic environment, sludge without phosphorus forms a precipitate, the sludge returns to the aeration zone through the sludge return pipe, and phosphorus-containing supernatant enters the dosing zone through the second sewage pipe.
Specifically, a dephosphorization filler is arranged in the dephosphorization zone.
Specifically, a chemical phosphorus removal agent is fed into the dosing area, and the chemical phosphorus removal agent contains lime milk.
Specifically, the sewage flow in the sewage dephosphorization integrated device is as follows: the treated dephosphorized water is discharged from the water outlet from the aeration zone to the first precipitation zone; and the phosphorus-containing sludge enters the phosphorus removal zone, after the phosphorus removal zone reacts, the phosphorus-containing supernatant enters the dosing zone, after the reaction of the dosing zone, the phosphorus-containing supernatant enters a second precipitation zone, and the phosphorus-containing supernatant flows back to the aeration zone.
Specifically, the sludge flow direction in the sewage dephosphorization integrated device is as follows: after the reaction in the aeration zone, the phosphorus-containing sludge enters the first settling zone; after the reaction in the first sedimentation zone, the phosphorus-containing sludge enters the phosphorus removal zone; after the reaction in the dephosphorization zone, the dephosphorization sludge containing the phosphorus-accumulating bacteria flows back to the aeration zone through the sludge return pipe; and the phosphorus-containing sewage in the phosphorus removal area reacts with the second sedimentation area through the dosing area to form concentrated phosphorus-containing sludge, and the concentrated phosphorus-containing sludge is discharged from a sludge outlet of the second sedimentation area.
The sewage dephosphorization integrated device based on phosphorus recovery combines chemical dephosphorization and biological dephosphorization, improves the sewage dephosphorization effect, recovers and utilizes phosphorus in sludge, and has the advantages of compact layout, convenient operation, good removal effect, and synchronous denitrification and dephosphorization for removing organic matters.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 shows a schematic diagram of an integrated sewage dephosphorization apparatus based on phosphorus recovery in an embodiment of the invention;
FIG. 2 shows a sewage and sludge flow diagram of an integrated sewage and phosphorus removal device based on phosphorus recovery in an embodiment of the invention;
reference numerals: 1-an aeration zone; 2-a first precipitation zone; 3-a phosphorus removal zone; 4-a medicine adding area; 5-a second precipitation zone; 6-water inlet; 7-a water outlet; 8-a sludge outlet; 9-a sludge return pipe; 10-dephosphorization water reflux pipe; 11-a first sewer pipe; 12-a sludge pipe; 13-a second sewer pipe; 14-third sewer pipe.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "connected" and "communicating" mean connected or communicating either directly or indirectly through other components. The terms "first", "second", etc. may refer to different or the same objects, but do not directly indicate a difference in order or degree of importance. Other explicit and implicit definitions are also possible below.
As shown in fig. 1: the sewage dephosphorization integrated device based on phosphorus recovery in the embodiment of the invention comprises an aeration zone 1 and a first precipitation zone 2; a phosphorus removal zone 3, a medicine adding zone 4 and a second precipitation zone 5.
As shown in fig. 2: the sewage and sludge flow diagram of the sewage and phosphorus removal integrated device based on phosphorus recovery in the embodiment of the invention;
the aeration zone 1 is provided with a water inlet 6, the second settling zone 5 is communicated with the aeration zone 1 through a dephosphorizing water return pipe 10, and the dephosphorizing zone 3 is communicated with the aeration zone 1 through a sludge return pipe 9;
the aeration zone 1 is communicated with the first settling zone 2 through a first sewage pipe 11; the first settling zone 2 is provided with a water outlet 7 for discharging the treated sewage, and the first settling zone 2 is communicated with the phosphorus removal zone 3 through a sludge pipe 12 for phosphorus-containing sludge to pass through;
the phosphorus removal zone 3 is communicated with the aeration zone 1 through a sludge return pipe 9, the phosphorus removal sludge containing phosphorus-accumulating bacteria flows back to the aeration zone 1 through the sludge return pipe 9, the phosphorus removal zone 3 is communicated with the dosing zone 4 through a second sewage pipe 13, and the phosphorus-containing supernatant enters the dosing zone 4 through the second sewage pipe 13;
the second sedimentation zone 5 is provided with a sludge outlet 8, and after the sewage is reacted by the chemical adding zone 4, the phosphorus-containing sludge enters the second sedimentation zone 5 and is discharged through the sludge outlet 8 and can be used as fertilizer;
the dosing zone 4 is communicated with the second settling zone 5 through a third sewage pipe 14, and the supernatant (dephosphorized water) flows back to the aeration zone 1 through the third sewage pipe 14 and the dephosphorized water return pipe 10.
Sewage dephosphorization integrated device based on phosphorus is retrieved, the flow direction of its sewage, mud:
(1) The raw water of the phosphorus-containing sewage enters an aeration zone 1 through a water inlet 6, the dephosphorizing water of the supernatant of a second settling zone 5 also enters the aeration zone 1 through a dephosphorizing water return pipe 10, and the dephosphorizing sludge (containing the phosphorus-accumulating bacteria) of a dephosphorizing zone 3 also returns to the aeration zone 1 through a sludge return pipe 9;
(2) After the reaction in the aeration zone 1, the phosphorus-containing sludge and the dephosphorized water enter the first settling zone 2 through a first sewage pipe 11;
(3) After the reaction in the first sedimentation zone 2, the dephosphorizing water is discharged from a water outlet 7, the phosphorus-containing sludge enters a phosphorus removal zone 3 through a sludge pipe 12, the phosphorus removal zone 3 is an anaerobic zone, phosphorus is fully released in an anaerobic environment, and dissolved oxygen DO is less than 0.2mg/L;
(4) After the reaction in the phosphorus removal zone 3, the phosphorus-containing supernatant enters a medicine adding zone 4 through a second sewage pipe 13, and the medicine adding zone 4 is used for chemical phosphorus removal, namely, lime milk is added into the medicine adding zone, and the mixture is mixed and stirred to enable phosphorus to react with the lime milk to form a calcium phosphate solid substance;
(5) After sewage enters the second sedimentation zone 5 through the third sewage pipe 14 after reacting in the dosing zone 4, the phosphorus-containing sludge is discharged through the sludge outlet 8 and can be used as fertilizer, and supernatant (dephosphorizing water) flows back to the aeration zone 1 through the dephosphorizing water return pipe 10.
The embodiment of the invention is applied to domestic sewage treatment in a certain community, and the treatment capacity is 20t/d. After the device is successfully started, the TN (total nitrogen), TP (total phosphorus) and COD (chemical oxygen demand) treatment effect data of the sewage for 30 days are shown in the following table:
the domestic sewage passes through the sewage treatment system, the effluent indexes meet the first-class A standard of pollutant discharge standard of urban sewage treatment plants, and the treatment efficiency reaches over 80 percent.
Compared with the prior art, the invention has the beneficial effects that:
(1) Can simultaneously play the roles of denitrification, dephosphorization and organic matter removal, and the effluent TP is less than 0.6 mg/L, TN and less than 10mg/L, COD and less than 15mg/L.
(2) Meanwhile, chemical phosphorus removal and biological phosphorus removal are adopted, so that the phosphorus removal efficiency is high and the effect is good;
(3) The residual sludge has high phosphorus content and can be used as a fertilizer to realize resource utilization.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements over the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A sewage dephosphorization integrated device based on phosphorus recovery is characterized by comprising an aeration zone, a first precipitation zone, a phosphorus removal zone, a dosing zone and a second precipitation zone; the aeration zone is provided with a water inlet, and the first sedimentation zone is provided with a water outlet; the aeration zone is provided with a first sewage pipe communicated with the first sedimentation zone, the first sedimentation zone is provided with a sludge pipe communicated with the dephosphorization zone, the dephosphorization zone is provided with a second sewage pipe communicated with the dosing zone, the dosing zone is provided with a third sewage pipe communicated with the second sedimentation zone, and the second sedimentation zone is provided with a dephosphorization water return pipe communicated with the aeration zone; the dephosphorization zone is provided with a sludge return pipe which is communicated with the aeration zone, and the second sedimentation zone is provided with a sludge outlet.
2. The phosphorus recovery-based sewage and phosphorus removal integrated device of claim 1, wherein the aeration zone adopts a water inlet mode of bottom inlet and top outlet, and is used for taking up phosphorus by phosphorus accumulating bacteria, removing organic matters and simultaneously performing nitrification.
3. The integrated phosphorus removal device as claimed in claim 1, wherein the phosphorus-containing sewage from the water inlet enters the aeration zone, the supernatant of the second settling zone enters the aeration zone through the dephosphorizing water return pipe, and the dephosphorizing sludge from the phosphorus removal zone returns to the aeration zone through the sludge return pipe, wherein the dephosphorizing sludge contains phosphorus-accumulating bacteria.
4. The integrated phosphorus removal device for sewage based on phosphorus recovery as claimed in claim 1, wherein the phosphorus removal zone is an anaerobic zone, the phosphorus-containing sludge in the first precipitation zone enters the phosphorus removal zone through the sludge pipe, phosphorus is released in an anaerobic environment, the sludge without phosphorus forms a precipitate, the sludge returns to the aeration zone through the sludge return pipe, and the phosphorus-containing supernatant enters the dosing zone through the second sewage pipe.
5. The integrated phosphorus removal device for sewage based on phosphorus recovery as claimed in claim 1, wherein phosphorus removal filler is disposed in the phosphorus removal region.
6. The integrated phosphorus removal device for sewage based on phosphorus recovery as claimed in claim 1, wherein chemical phosphorus removal agent is fed to the dosing region, and the chemical phosphorus removal agent contains lime milk.
7. The phosphorus recovery-based sewage phosphorus removal integrated device as claimed in any one of claims 1 to 6, wherein the sewage in the sewage phosphorus removal integrated device flows to: the treated dephosphorized water is discharged from the water outlet from the aeration zone to the first precipitation zone; and the phosphorus-containing sludge enters the phosphorus removal zone, after the phosphorus removal zone reacts, the phosphorus-containing supernatant enters the dosing zone, after the reaction of the dosing zone, the phosphorus-containing supernatant enters a second precipitation zone, and the phosphorus-containing supernatant flows back to the aeration zone.
8. The phosphorus recovery-based sewage phosphorus removal integrated device as claimed in any one of claims 1 to 6, wherein the sludge in the sewage phosphorus removal integrated device flows to: after the reaction in the aeration zone, the phosphorus-containing sludge enters the first settling zone; after the reaction in the first sedimentation zone, the phosphorus-containing sludge enters the phosphorus removal zone; after the reaction in the dephosphorization zone, the dephosphorization sludge containing the phosphorus-accumulating bacteria flows back to the aeration zone through the sludge return pipe; and the phosphorus-containing sewage in the phosphorus removal area reacts with the second sedimentation area through the dosing area to form concentrated phosphorus-containing sludge, and the concentrated phosphorus-containing sludge is discharged from a sludge outlet of the second sedimentation area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211162043.0A CN115231784B (en) | 2022-09-23 | 2022-09-23 | Sewage dephosphorization integrated device based on phosphorus is retrieved |
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| CN202211162043.0A CN115231784B (en) | 2022-09-23 | 2022-09-23 | Sewage dephosphorization integrated device based on phosphorus is retrieved |
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| CN115231784A true CN115231784A (en) | 2022-10-25 |
| CN115231784B CN115231784B (en) | 2022-12-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045557A1 (en) * | 2003-09-02 | 2005-03-03 | Ch2M Hill, Inc. | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent |
| CN201261748Y (en) * | 2008-04-18 | 2009-06-24 | 北京工业大学 | Chemical dephosphorization apparatus based on anoxic-anaerobic-oxidation ditch |
| KR101048666B1 (en) * | 2011-01-07 | 2011-07-12 | (주) 부경이엔지 | Advanced wastewater treatment system which combined suspended and attached biological nutrient removal process and physical-chemical phosphorous removal process |
| CN203392986U (en) * | 2013-08-18 | 2014-01-15 | 武汉宝捷能环境工程技术有限公司 | V-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation |
| CN107735367A (en) * | 2015-04-28 | 2018-02-23 | Aquatec垂直流迷宫有限公司 | Use the method and apparatus of the Wastewater Treated by Activated Sludge Process waste water with intensified denitrification and dephosphorization |
-
2022
- 2022-09-23 CN CN202211162043.0A patent/CN115231784B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045557A1 (en) * | 2003-09-02 | 2005-03-03 | Ch2M Hill, Inc. | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent |
| CN1845879A (en) * | 2003-09-02 | 2006-10-11 | 西图法人公司 | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent |
| CN201261748Y (en) * | 2008-04-18 | 2009-06-24 | 北京工业大学 | Chemical dephosphorization apparatus based on anoxic-anaerobic-oxidation ditch |
| KR101048666B1 (en) * | 2011-01-07 | 2011-07-12 | (주) 부경이엔지 | Advanced wastewater treatment system which combined suspended and attached biological nutrient removal process and physical-chemical phosphorous removal process |
| CN203392986U (en) * | 2013-08-18 | 2014-01-15 | 武汉宝捷能环境工程技术有限公司 | V-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation |
| CN107735367A (en) * | 2015-04-28 | 2018-02-23 | Aquatec垂直流迷宫有限公司 | Use the method and apparatus of the Wastewater Treated by Activated Sludge Process waste water with intensified denitrification and dephosphorization |
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Effective date of registration: 20230308 Address after: No. 16 Xingguang West Road, Changlinhe Town, Feidong County, Hefei City, Anhui Province 231605 Patentee after: Hefei laiche Water Ecological Technology Co.,Ltd. Address before: 2301A, Floor 23, Building 2, Yard 2, South Ronghua Road, Beijing Economic Development Zone, 100176 Patentee before: BEIJING LAICHE TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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