High-efficient aerobic biological phosphorus removal method

An aerobic biological and biological phosphorus removal technology, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of isolation, equipment investment, operation cost and operation complexity reduction , short sludge age and other issues, to achieve the effect of reducing operating costs and operational complexity, reducing sludge treatment costs, and solving the contradiction of sludge age

Active Publication Date: 2013-06-26
应清界
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The purpose of the present invention is to provide a method for removing phosphorus-containing compounds in sewage through the action of microorganisms through a completely aerobic process, so as to solve the problem that the traditional enhanced biological phosphorus removal technology needs to be carried out in two different reaction units. Only in this way can the problem of phosphorus removal be realized; to achieve biological phosphorus removal in an aerobic reaction unit, there is no need to divide different operating units in time and space, which greatly reduces equipment investment, operating costs and operational complexity; the present invention The biological phosphorus removal mechanism of the present invention is essentially different from the traditional enhanced biological phosphorus removal mechanism. The phosphorus removal mechanism of the present invention is to make the phosphorus compound in the sewage become a gaseous PH 3 It is different from the traditional enhanced biological phosphorus removal, which relies on phosphorus-accumulating bacteria to absorb excess phosphorus and then discharge sludge to remove it.
Phosphorus removal in the present invention does not rely on accumulation in organisms, and achieves the purpose of phosphorus removal through sludge discharge, so the amount of sludge produced is much less than that of traditional enhanced biological phosphorus removal methods, which can reduce sludge treatment costs; It solves the problem that the sludge age must be short in order to achieve a good phosphorus removal effect in the existing enhanced biological phosphorus removal process, solves the contradiction between the sludge age and the denitrification, and can achieve the effect of phosphorus removal alone in the process

Method used

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  • High-efficient aerobic biological phosphorus removal method
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  • High-efficient aerobic biological phosphorus removal method

Examples

Experimental program
Comparison scheme
Effect test

example 1～5

[0056] The treated raw water is drawn from the intake channel of the actual sewage treatment plant. The influent part of the sewage treatment plant is domestic sewage and the other part is industrial sewage, and no other nutrients are required.

[0057] Basic situation of actual water quality: COD Cr =213~610mg / l, TP=2.90~8.90mg / l, pH value 6.0~7.5.

[0058] Actual control indicators: MLSS=4.55~6.56g / l, aerobic bioreactor pH value 6.5~9.0, aerobic bioreactor hydraulic retention time HRT=12 hours, biochemical tank DO: 2~4mg / l, sedimentation tank The sedimentation time is controlled at 1.5 hours, the influent flow rate is 0.125t / h, the reflux ratio R=3.0, and the mud age is controlled at 30 days.

[0059] Among the effluent indicators after running the above sewage treatment: COD Cr =3~23mg / l, TP=0.08~0.26mg / l. The actual results of specific influent water quality and treated water quality are shown in Table 1.

Embodiment 1-5

[0061]

example 6～10

[0063] The treated raw water is drawn from the intake channel of the actual sewage treatment plant. The influent part of the sewage treatment plant is domestic sewage and the other part is industrial sewage, and no other nutrients are required.

[0064] Basic situation of actual water quality: COD Cr =250~573mg / l, TP=1.15~7.95mg / l, pH value 6.0~7.5.

[0065] Actual control index: MLSS=4.23~6.55g / l, aerobic bioreactor pH value 6.5~7.5, aerobic bioreactor hydraulic retention time HRT=8.3 hours, biochemical tank DO: 2~4mg / l, sedimentation tank The settling time is controlled at 1.5 hours, the influent flow rate is 0.18t / h, the reflux ratio R=1.5, and the mud age is controlled at 25 days.

[0066] Among the effluent indicators after running the above sewage treatment: COD Cr =7~24mg / l, TP=0.05~0.26mg / l. The actual results of the specific influent water quality and the treated water quality are shown in Table 2.

[0067] Table 2 Treatment results under different influent water quality con...

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Abstract

The invention discloses a high-efficient aerobic biological phosphorus removal method. According to the aerobic biological phosphorus removal method, by controlling the sludge return ratio, the reaction pH value, the DO (dissolved oxygen) value in a biological reactor, the sludge concentration in the biological reactor and other indexes and adding aerobic compound phosphorus removal flora to perform treatment on phosphorus-containing sewage, one-section type aerobic biological phosphorus removal is realized, and the phosphorus removal rate can exceed 90%. The method is suitable for treating the phosphorus-containing urban sewage, as well as other types of phosphorus-containing sewage with the similar water quality; and the method has the advantages of low investment, simplicity in operation and capability of reducing treatment cost.

Description

Technical field [0001] The invention relates to a sewage treatment method in the technical field of resources and environment, in particular to a treatment method for removing phosphorus from sewage in an aerobic bioreactor by microorganisms. Background technique [0002] With the rapid growth of China’s economy and the substantial increase in resource and energy consumption, the intensity of pollutant emissions has increased and the load has increased. The discharge of major pollutants has exceeded the environmental capacity of receiving water bodies, causing serious problems in receiving water bodies such as lakes, rivers, and reservoirs. The problem of eutrophication is an environmental problem with nitrogen and phosphorus pollution as its basic characteristics. It is mainly manifested as serious eutrophication of water bodies, causing excessive proliferation of algae, reduced dissolved oxygen in the water body, death of aquatic organisms, and accelerated water quality deterior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 应清界潘涛汪苹覃晓农王智宏郭利川
Owner 应清界
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