CN111268792A - Sedimentation tank excess sludge discharge position based on high settleability bacterium addition - Google Patents
Sedimentation tank excess sludge discharge position based on high settleability bacterium addition Download PDFInfo
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- CN111268792A CN111268792A CN201811478776.9A CN201811478776A CN111268792A CN 111268792 A CN111268792 A CN 111268792A CN 201811478776 A CN201811478776 A CN 201811478776A CN 111268792 A CN111268792 A CN 111268792A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
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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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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract
A sedimentation tank excess sludge discharge position based on high settleability bacteria addition belongs to the technical field of water treatment. The bacteria enrichment culture with the nitrogen and phosphorus removal function is biologically added to a sewage treatment continuous flow activated sludge process, and the activated sludge settleability is obviously improved in the bacteria enrichment process, so that the added functional bacteria are effectively prevented from being lost along with the discharge of excess sludge, and the sludge discharge position of the excess sludge of a secondary sedimentation tank of the traditional continuous flow activated sludge process is improved from the bottom of the tank to the position close to a sludge surface layer below a sedimentation sludge surface layer, so that the functional bacteria are effectively reserved in a reaction system, and the concentration of the functional bacteria is improved.
Description
Technical Field
The invention belongs to the field of water treatment, and particularly relates to a sedimentation tank excess sludge discharge position based on high-settleability bacteria addition.
Background
The existing activated sludge treatment process widely applied in the world degrades pollutants through biological action and has the advantage of no secondary pollution to the environment. The concentration and activity of functional bacteria related to biological effects such as nitrogen and phosphorus removal in the activated sludge of the sewage treatment system are in direct proportion to the reaction rate, and the treatment effect of the sewage treatment process is directly influenced. Traditional continuous flow activated sludge processes control sludge age by excess sludge discharge. In the past, the method of adding carrier filler, cell immobilized bioactive filler and the like is generally adopted to increase the concentration of functional bacteria in a reactor, prevent the functional bacteria from losing and prolong the sludge age, thereby improving the reaction rate. Therefore, the method has important significance for effectively retaining high-concentration functional bacteria in the reaction system.
The residual sludge discharge position of a secondary sedimentation tank of the traditional continuous flow activated sludge process is positioned at the bottom of the sedimentation tank, and partial sludge is discharged along with the residual sludge. The bacteria with strong settleability are distributed at the bottom of the sedimentation tank and are easy to run off from the system through sludge discharge.
Aiming at the problems, a sedimentation tank excess sludge discharge position based on high-settleability bacteria addition is developed, the sludge discharge position of the secondary sedimentation tank excess sludge of the traditional continuous flow activated sludge process is increased from the bottom of the tank to a position close to a sludge surface layer below the sludge surface layer, and after a functional bacteria enrichment culture with excellent settleability and a nitrogen and phosphorus removal function is added to the continuous flow activated sludge process, the functional bacteria can be effectively prevented from being lost along with the discharge of the excess sludge, so that the method has a wide application prospect in the field of biological nitrogen and phosphorus removal of water treatment.
Disclosure of Invention
The invention aims to develop a sedimentation tank excess sludge discharge position based on high-settleability bacteria addition, the method is used for preventing added functional bacteria with high settleability from losing along with excess sludge discharge in a continuous flow activated sludge process, the sedimentation tank excess sludge discharge position is applied to the field of biological nitrogen and phosphorus removal of water treatment, the functional bacteria with high settleability can be effectively reserved in a water treatment system, the sludge age of the functional bacteria with high settleability is prolonged, and the concentration of the functional bacteria with high nitrogen and phosphorus removal is improved. In order to realize the state, the invention adopts the following technical scheme.
The utility model provides a sedimentation tank excess sludge arranges mud position based on bacterium of high settleability adds which characterized in that: the sludge discharge position of the residual sludge of the traditional secondary sedimentation tank is increased from the bottom of the tank to a position close to the sludge surface layer below the sludge surface layer, and after high-settleability nitrogen and phosphorus removal functional bacteria are added to the continuous flow activated sludge process, the functional bacteria are effectively prevented from being lost along with the discharge of the residual sludge, so that the functional bacteria are effectively retained, the sludge age of the high-settleability nitrogen and phosphorus removal functional bacteria is prolonged, and the concentration of the nitrogen and phosphorus removal functional bacteria is increased.
The specific implementation steps of the sludge discharge position of the residual sludge in the sedimentation tank based on the addition of the high-settleability bacteria are as follows:
the sludge discharge position of the residual sludge in the secondary sedimentation tank of the traditional continuous flow activated sludge process is increased from the bottom of the tank to a position close to the sludge surface layer below the sedimentation sludge surface layer.
The position of sludge discharge of the residual sludge in the sedimentation tank based on high-settleability bacteria addition is applied to the field of biological nitrogen and phosphorus removal in water treatment.
The beneficial effects of the sedimentation tank excess sludge discharge position based on high settleability bacteria addition mainly appear as follows:
1. effectively preventing the added functional bacteria from losing along with the discharge of the excess sludge;
2. the functional bacteria are effectively reserved, so that the concentration of the functional bacteria is improved;
3. the sludge age of the added denitrification and dephosphorization functional bacteria with high settleability is prolonged.
Drawings
FIG. 1 is a diagram of a sludge discharge position of excess sludge in a secondary sedimentation tank of a conventional continuous flow activated sludge process;
in the figure: 1. a secondary sedimentation tank 2, a residual sludge discharge position 3, an external return sludge position 4, effluent 5, a water surface 6 and a sludge surface.
FIG. 2 is a diagram of a secondary sedimentation tank excess sludge discharge position based on high settleability bacteria addition;
in the figure: 1. a secondary sedimentation tank 2, a residual sludge discharge position 3, an external return sludge position 4, effluent 5, a water surface 6 and a sludge surface.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Examples
Sedimentation tank excess sludge discharge position based on high settleability bacterium addition
The enrichment culture of the denitrifying and dephosphorizing functional bacteria with high settleability is obtained respectively. The culture was treated with wastewater treatment plant A2the/O process return sludge is inoculated sludge, and the SVI-30min of the inoculated sludge is 80-120 mL/g. SVI-30min of the functional bacteria enrichment culture with functions of shortcut nitrification, anaerobic ammonia oxidation and denitrification (dephosphorization) by using nitrite as an electron acceptor is respectively reduced to 25mL/g, 38mL/g and 35 mL/g.
The sludge discharging position of the residual sludge of the secondary sedimentation tank of the traditional continuous flow activated sludge process is positioned at the bottom of the sedimentation tank. The sludge discharge position of the residual sludge in the secondary sedimentation tank of the traditional continuous flow activated sludge process is increased from the bottom of the tank to a position close to the sludge surface layer below the sedimentation sludge surface layer. The sludge discharging position of the secondary sedimentation tank excess sludge of the traditional continuous flow activated sludge process is shown in figure 1, and the sludge discharging position of the secondary sedimentation tank excess sludge based on the addition of bacteria with high settleability is shown in figure 2.
The functional bacteria enrichment culture is added into a continuous flow activated sludge process at a sludge discharge position of excess sludge in a sedimentation tank based on high-settleability bacteria addition, and the functional bacteria have excellent settling capacity and are easy to settle at the bottom in a secondary sedimentation tank along with the flow of activated sludge in a system. The sludge discharge position of the residual sludge in the secondary sedimentation tank of the traditional continuous flow activated sludge process is increased from the bottom of the tank to the position close to the sludge surface layer below the sedimentation sludge surface layer, so that the functional bacteria can be prevented from being lost along with the discharge of the residual sludge, the retention time of the functional bacteria in the system is prolonged, and the sludge age is prolonged.
The above examples show that the sedimentation tank excess sludge discharge position based on high-settleability bacteria addition can effectively prevent the added high-settleability denitrification and dephosphorization functional bacteria from losing along with the excess sludge discharge so as to realize the effective retention of the added high-settleability denitrification and dephosphorization functional bacteria, and prolong the sludge age of the high-settleability denitrification and dephosphorization functional bacteria, thereby improving the concentration of the denitrification and dephosphorization functional bacteria and having wide application prospects in the field of biological denitrification and dephosphorization of water treatment. The method can be used for guiding the upgrading and reconstruction of an actual sewage treatment plant, is applied to the field of biological nitrogen and phosphorus removal of water treatment, and has an application prospect with high economic value.
Claims (2)
1. A sedimentation tank excess sludge discharge position based on high settleability bacteria addition is characterized by comprising the following specific implementation steps:
the sludge discharge position of the residual sludge in the secondary sedimentation tank of the traditional continuous flow activated sludge process is increased from the bottom of the tank to a position close to the sludge surface layer below the sedimentation sludge surface layer.
2. The position for discharging the excess sludge in the sedimentation tank based on the addition of the bacteria with high settleability is characterized by being applied to the field of biological nitrogen and phosphorus removal in water treatment.
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| CN201811478776.9A CN111268792A (en) | 2018-12-05 | 2018-12-05 | Sedimentation tank excess sludge discharge position based on high settleability bacterium addition |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010020071A1 (en) * | 2009-05-11 | 2011-01-13 | Bräutigam Kunststoffsysteme GmbH | Restraint system for water-sludge mixtures in backwashing processes at filter systems |
| US20130233793A1 (en) * | 2010-11-24 | 2013-09-12 | Takaaki Tokutomi | Anaerobic treatment method and apparatus |
| CN104817175A (en) * | 2015-04-29 | 2015-08-05 | 深圳北航新兴产业技术研究院 | Method for reinforcing sewage denitrification and dephosphorization efficiency and simultaneously generating electricity |
| CN104843870A (en) * | 2015-04-24 | 2015-08-19 | 浙江省环境保护科学设计研究院 | Magnetic carrier immobilized microorganism live bacteria preparation and preparation method and application thereof |
| CN207243693U (en) * | 2017-09-19 | 2018-04-17 | 刘壮 | A kind of sewage disposal device using bacillus as main flora |
-
2018
- 2018-12-05 CN CN201811478776.9A patent/CN111268792A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010020071A1 (en) * | 2009-05-11 | 2011-01-13 | Bräutigam Kunststoffsysteme GmbH | Restraint system for water-sludge mixtures in backwashing processes at filter systems |
| US20130233793A1 (en) * | 2010-11-24 | 2013-09-12 | Takaaki Tokutomi | Anaerobic treatment method and apparatus |
| CN104843870A (en) * | 2015-04-24 | 2015-08-19 | 浙江省环境保护科学设计研究院 | Magnetic carrier immobilized microorganism live bacteria preparation and preparation method and application thereof |
| CN104817175A (en) * | 2015-04-29 | 2015-08-05 | 深圳北航新兴产业技术研究院 | Method for reinforcing sewage denitrification and dephosphorization efficiency and simultaneously generating electricity |
| CN207243693U (en) * | 2017-09-19 | 2018-04-17 | 刘壮 | A kind of sewage disposal device using bacillus as main flora |
Non-Patent Citations (1)
| Title |
|---|
| 戴一成: "《建设绿色城市-污水治理设计》", 31 January 2011, 安徽人民出版社 * |
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Address after: 100072 Room 101, unit 6, building 1, courtyard 17, Sanli, dongshanpo, Fengtai District, Beijing Applicant after: Yao Renda Address before: 100123 No.102, unit 4, new 5th floor, ganluyuan Nanli, Chaoyang District, Beijing Applicant before: Yao Renda |
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Application publication date: 20200612 |