Biological phosphorus removal system construction method based on particle and floc coexistence

A technology for biological phosphorus removal and construction methods, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. problems, to achieve good phosphorus removal capacity and sludge settling performance, excellent phosphorus removal effect, and maintain stable operation.

Inactive Publication Date: 2015-06-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that flocculent activated sludge is not easy to settle, the stability of granular sludge is

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation mode 1: In this implementation mode, the construction method of the biological phosphorus removal system based on the coexistence of particles and flocs is as follows:

[0016] Inoculate the sludge from the secondary settling tank in the sequence batch reactor SBR, the concentration of the inoculated sludge is 2000-4000mg / L, at a reaction temperature of 10-25°C, the volume exchange rate of the sequence batch reactor SBR is 50%, Under the condition that the height-to-diameter ratio of the sequencing batch reactor SBR is 1.3-3.5, add synthetic sewage with sodium propionate as the carbon source into the sequencing batch reactor SBR, and then anaerobically stir under anaerobic conditions for 30- 180 minutes, and then under the condition of superficial gas velocity of 0.0006-0.0026m / s, aerobic reaction for 120-360 minutes, then settling, draining water, and completing the construction of the biological phosphorus removal system based on the coexistence...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the aspect ratio of the sequencing batch reactor SBR is 1.5-3. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the aspect ratio of the sequencing batch reactor SBR is 1.8-2.5. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a biological phosphorus removal system construction method based on particle and floc coexistence, relates to the biological phosphorus removal system construction method, and aims at solving the technical problems that flocculent activated sludge is not prone to sedimentation, the stability of granule sludge is poor, and requirements for culture conditions of the granule sludge are severe. The method comprises the steps that sludge is inoculated into a secondary sedimentation tank, artificial waste water which takes sodium propionate as a carbon source is added into the secondary sedimentation tank, anaerobic agitation is conducted, aerobic reaction is conducted, sedimentation is conducted, and drainage is conducted. By means of he biological phosphorus removal particles and floc sludge system cultivated through the method, the dynamic stability of particles and flocs can be kept in six-month running time, and good phosphorus removal capability and sludge sedimentation performance are achieved. By means of the biological phosphorus removal system construction method based on the particle and floc coexistence, after the system is run for fifty days, the ratio of particles to total sludge quantity ranges from 47% to 67%, the sludge sedimentation index ranges from 35 mL/g to 56 mL/g, the removal rate of COD is over 90%, and the removal rate of PO4<3->-P is over 95%. The invention belongs to the technical field of biological treatment of waste water.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a method for constructing a biological phosphorus removal system. Background technique [0002] In order to control the phosphorus content of sewage plant effluent, as an economical and sustainable enhanced biological phosphorus removal technology (Enhanced Biological Phosphorus Removal, EBPR) has been widely used in sewage treatment plants, the sludge in this technology alternately undergoes anaerobic , Aerobic environment, with the excess phosphorus uptake ability of the enriched phosphorus accumulating bacteria in the system, the phosphate in the sewage is stored in the body in the form of phosphorus accumulation and discharged from the system in the form of excess sludge. At present, the sludge in the enhanced biological phosphorus removal mainly exists in the form of flocculent activated sludge, which has a small particle size and high act...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/308
Inventor 彭永臻王然登
Owner HARBIN INST OF TECH
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