Method and device for enhancing biological phosphorus removal

A technology of biological phosphorus removal and aeration device, which is applied in biological treatment devices, chemical instruments and methods, sustainable biological treatment, etc., can solve the problem that total nitrogen and total phosphorus are difficult to meet the standards of residual sludge at the same time, and achieve the elimination of adverse effects, The effect of less residual sludge and reducing sludge discharge

Active Publication Date: 2015-06-24
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for membrane-bioreactor dephosphorization and conventional biological denitrification and dephosphorization process in the total phosphorus reduction technology for sewage biological treatment. At the same time, the problem of reaching the standard and producing a lot of excess sludge can strengthen the denitrification and phosphorus removal, and has the advantages of stable effluent quality, convenient operation, low operating cost, less excess sludge, and easy engineering promotion and application.

Method used

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  • Method and device for enhancing biological phosphorus removal
  • Method and device for enhancing biological phosphorus removal
  • Method and device for enhancing biological phosphorus removal

Examples

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Effect test

Embodiment 1

[0040] Example 1: Enhanced phosphorus removal treatment for AAO-MBR process.

[0041] Such as Figure 4 As shown, in the AAO-MBR process, the reactor (reactor a) using polyacrylonitrile (PAN) as the membrane material of the phosphorus removal membrane module 2 and the conventional AAO-MBR process (reactor b) are added for domestic sewage treatment results Compare. By measuring the critical flux of 40 L / (m 2 h), select 95% of its critical flux, that is, 38 L / (m 2 h) as its critical flux. The sludge age of both sets of reactors is 20d. The total phosphorus (TP) in the feedwater of the conventional AAO-MBR process is 3.44-8.11 mg / L. Due to the lack of carbon sources and high nitrate content after nitrification, the conventional AAO-MBR process has high total phosphorus (1.52-3.02 mg / L) in the effluent, and has maintained a low phosphorus removal rate. In contrast, the reactor added with phosphorus removal membrane module 2, under the effect of enrichment and discharge of me...

Embodiment 2

[0042] Embodiment 2: To the total phosphorus removal situation of strengthened treatment catering wastewater.

[0043] Catering waste water is treated by the air flotation-MBR process, and phosphorus removal is strengthened by using the invention. Reactor 1 sludge age is 60d. The total phosphorus in the influent is 9.60-15.70 mg / L. The total phosphorus is reduced to 3.88-6.44 mg / L through air flotation, and the MBR effluent is reduced to 0.71-1.95 mg / L through the enhanced phosphorus removal of the present invention, with an average phosphorus removal rate of 88.2%.

Embodiment 3

[0044] Example 3: Treatment of total phosphorus removal from self-mixed sewage with high phosphorus content.

[0045] Self-prepared sewage with high phosphorus content is treated by AAO process, and phosphorus removal is strengthened by using the present invention. Reactor 1 sludge age is 40d. The total phosphorus in the influent is 15.43-19.93 mg / L. Through the enhanced phosphorus removal effect of the present invention, the total phosphorus in the effluent treated with AAO is reduced to 1.97-3.09 mg / L, and the average phosphorus removal rate is 85.5%. During the operation period, the sludge flocs loosened and the sedimentation performance deteriorated due to the removal of sludge EPS. Through the real-time monitoring of the sludge flocs, the sludge properties are controlled to be stable.

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Abstract

The invention discloses a method and a device for enhancing biological phosphorus removal. The device comprises a phosphorus removal film assembly, a water outlet pump, an aerating device, an air compressor, a vacuum meter and a gas flow meter, wherein the phosphorus removal film assembly is arranged vertically in a reactor; the phosphorus removal film is arranged on the side surface of the phosphorus removal film assembly; the top of the phosphorus removal film assembly is connected with the water outlet pump through a pipeline, the vacuum meter is arranged on the pipeline; the aerating device is arranged below the phosphorus removal film assembly; the air compressor is connected with the aerating device; and the gas flow meter is arranged on the pipeline which connects the air compressor with the aerating device. The method for enhancing biological phosphorus removal comprises the step of arranging the enhanced phosphorus removal film assembly in the reactor to enrich gel layer film contaminants, and realizing the enhancement of the phosphorus removal of the reactor system by removing the phosphorus-containing gel film contaminants. The device and method for enhancing biological phosphorus removal provided by the invention are wide in application scope, applicable for low-carbon-source high-phosphorus-content sewage, low in running cost, convenient to operate and manage, and convenient for popularization and application.

Description

technical field [0001] The invention relates to a method and a device applicable to the effluent total phosphorus reduction control technology of sewage biological treatment, in particular to a method and a device for intensifying biological phosphorus removal. Background technique [0002] Wastewater containing more nitrogen and phosphorus is discharged into relatively closed water bodies such as lakes or bays, which will cause eutrophication and lead to deterioration of water quality or lake degradation. Therefore, sewage must adopt appropriate treatment process for denitrification and phosphorus removal before discharge. The currently widely used biological nitrogen and phosphorus removal processes mainly include AAO (anaerobic-anoxic-aerobic), SBR (sequential batch activated sludge process, Sequeneing Batch Reactor Aetivated Sludge Porecss) and other processes. These processes mainly rely on the excessive absorption of phosphorus by phosphorus accumulating bacteria to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F9/14C02F3/30
CPCC02F3/1268C02F3/30C02F3/308C02F2203/004C02F2203/006C02F2301/00C02F2305/00Y02W10/10
Inventor 王盼张辰谭学军沈昌明吴志超叶少帆陈和谦张宁
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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