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Method for reducing COD value of tail water in activated-sludge-process sewage treatment system

A technology of sewage treatment system and activated sludge method, applied in water/sludge/sewage treatment, biological water/sewage treatment, adsorption water/sewage treatment, etc., to achieve large habitat space, improve adsorption performance, and avoid settlement effects

Inactive Publication Date: 2021-08-31
陈宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned deficiencies, and provides a method that can make full use of the characteristics of diatomite in the sewage treatment system of the activated sludge process to improve the biochemical efficiency of the system, and avoid the above-mentioned unfavorable problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one: a kind of method that reduces tail water COD value in activated sludge method sewage treatment system, comprises the following steps:

[0037] (1) Coarse filtration: Preliminary filtration of waste water through the grid to filter out large particles and sundries;

[0038] (2) Aeration: Oxygenate and aerate the coarsely filtered wastewater;

[0039] (3) Cultivate beneficial bacteria: Take special silicon ceramic blocks with a porous structure and put them into plastic containers to make bioreactors, string the bioreactors into a string, hang them in a matrix arrangement, and place them in the aerated sewage tank. And put the beneficial bacteria, so that the beneficial bacteria can reproduce and form a film in the porous structure of the special silicon ceramic block in the bioreactor;

[0040] (4) Degradation of organic matter: In the bioreactor where beneficial bacteria are cultivated in step (3), beneficial bacteria with film-hanging growth grow on sp...

Embodiment 2

[0048] Embodiment two: a kind of method that reduces tail water COD value in activated sludge method sewage treatment system, comprises the following steps:

[0049] (1) Coarse filtration: Preliminary filtration of waste water through the grid to filter out large particles and sundries;

[0050] (2) Aeration: Oxygenate and aerate the coarsely filtered wastewater;

[0051] (3) Cultivate beneficial bacteria: Take special silicon ceramic blocks with a porous structure and put them into plastic containers to make bioreactors, string the bioreactors into a string, hang them in a matrix arrangement, and place them in the aerated sewage tank. And put the beneficial bacteria, so that the beneficial bacteria can reproduce and form a film in the porous structure of the special silicon ceramic block in the bioreactor;

[0052] (4) Degradation of organic matter: In the bioreactor where beneficial bacteria are cultivated in step (3), beneficial bacteria with film-hanging growth grow on sp...

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Abstract

The invention relates to the field of sewage treatment, in particular to a method for reducing the COD value of tail water in an activated-sludge-process sewage treatment system. The method comprises the following steps: rough filtration, aeration, beneficial bacterium culture, organic matter degradation, filtration and discharge. According to the invention, a special silicon ceramic block adopted by the invention has a porous structure, so the adsorption performance of the ceramic is improved, energy consumption is reduced, and cost is saved. According to the invention, the special silicon ceramic block is adopted to replace a traditional filler to prepare a bioreactor, so sedimentation caused by direct addition of diatomite is avoided, an inhabitation space as large as possible is provided for beneficial bacteria in sewage treatment, construction land is reduced, and construction and maintenance cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for reducing the COD value of tail water in an activated sludge process sewage treatment system. Background technique [0002] The activated sludge method is an important method in the current sewage treatment technology. The existing sludge method process is roughly as follows: waste water - grid filtration - aeration in the aeration adjustment tank - biochemical treatment in the biochemical filler tank to reduce the content of organic matter (that is, reduce the COD value) - through inclined plate sedimentation, quartz Sand filter and activated carbon filter complete the whole process of sewage treatment. At present, in order to improve the biochemical efficiency of the beneficial bacteria in the system, fiber flocculent composite filler or spongy filler is usually put in the aeration tank and other biochemical tanks to improve the growth environment and living space o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12C02F101/30
CPCC02F9/00C02F3/1236C02F1/001C02F3/34C02F1/28C02F2001/007C02F2209/08C02F2101/30Y02W10/10
Inventor 陈宁杨国模
Owner 陈宁
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