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Adjustable biological membrane-activated sludge sewage treatment method and adjustable biological membrane-activated sludge sewage treatment device

A sewage treatment method and sewage treatment device technology, applied in biological sludge treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of redundant and insufficient facilities, and achieve high nitrogen removal Phosphorus capacity, enhanced nitrogen and phosphorus removal capacity, enhanced adsorption and removal effect

Active Publication Date: 2018-11-23
尚川(北京)水务有限公司
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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 an adjustable biofilm-activated sludge sewage treatment method and device. The sewage treatment method provided by the present invention can cope with large changes in water quality without adding carbon sources, and can effectively solve the problem of sludge age contradictions , has a high ability to remove nitrogen and phosphorus, and effectively solves the problem of redundancy and insufficiency of sewage treatment plant facilities

Method used

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  • Adjustable biological membrane-activated sludge sewage treatment method and adjustable biological membrane-activated sludge sewage treatment device
  • Adjustable biological membrane-activated sludge sewage treatment method and adjustable biological membrane-activated sludge sewage treatment device
  • Adjustable biological membrane-activated sludge sewage treatment method and adjustable biological membrane-activated sludge sewage treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Simulate the inflow of low-concentration sewage (COD is 80-150mg / L) in summer in southern China, and carry out sewage treatment according to the following steps:

[0094] Step 1: Sewage is subjected to grid grit pretreatment in grid grit chamber 1 to remove slag with larger particle size to obtain pretreated sewage;

[0095] Step 2: open the mud-water mixed liquid return pump 9, close the water inlet distribution pump 8 and the sludge return pump 10, and deliver the pretreated sewage to the anaerobic pond / regulating pond 2 (the anaerobic pond / regulating pond serves as In the use of the regulating tank), the sewage and the silt are further separated; the obtained sewage and the return mud-water mixture are transported to the anoxic tank 3 for anoxic treatment, the hydraulic retention time is 3h, and the dissolved oxygen is 0.2mg / L. Anoxic pool effluent;

[0096] Step 3: Transport the effluent from the anoxic pool to the aerobic pool 4 for aerobic treatment. The filling ...

Embodiment 2

[0106] Simulate the inflow of low-concentration sewage in summer in the north or high-concentration sewage (COD is 150-350mg / L) in winter in the south, and carry out sewage treatment according to the following steps:

[0107] Step 1: Sewage is subjected to grid grit pretreatment in grid grit chamber 1 to remove slag with larger particle size to obtain pretreated sewage;

[0108] Step 2: Turn on the water inlet distribution pump 8, the mud-water mixture return pump 9 and the sludge return pump 10, and transport 80% of the pretreated sewage and return sedimentation sludge to the anaerobic tank / adjustment tank 2 by volume Anaerobic treatment is carried out in the above-mentioned anaerobic pool / conditioning pool as the anaerobic pool), and the hydraulic retention time is 2h to obtain the effluent of the anaerobic pool;

[0109] The effluent from the anaerobic tank, the reflux mud-water mixture and 20% pretreated sewage are transported to the anoxic tank 3 for anoxic treatment, the...

Embodiment 3

[0120] Simulate the inflow of high-concentration sewage (COD is 350-700mg / L) in northern winter, and carry out sewage treatment according to the following steps:

[0121] Step 1: Sewage is subjected to grid grit pretreatment in grid grit chamber 1 to remove slag with larger particle size to obtain pretreated sewage;

[0122] Step 2: Turn on the water inlet distribution pump 8, the mud-water mixture return pump 9 and the sludge return pump 10, and transport 95% of the pretreated sewage and the return sedimentation sludge to the anaerobic tank / adjustment tank 2 by volume Anaerobic treatment is carried out in the anaerobic pond / adjustment pond as described in the anaerobic pond), and the hydraulic retention time is 1.6h to obtain the effluent of the anaerobic pond;

[0123] The effluent from the anaerobic tank, the refluxed mud-water mixture and 5% pretreated sewage are transported to the anoxic tank 3 for anoxic treatment, the hydraulic retention time is 3 h, and the dissolved o...

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Abstract

The invention provides an adjustable biological membrane-activated sludge sewage treatment method. The sewage treatment method can handle sharp changes of water quality, an external carbon source is not needed, the problem of sludge age contradiction can be solved effectively, higher nitrogen and phosphorus removal capability is realized, pollutant impact load is handled by adjusting the filling ratio of fillers, and the problems of redundancy and deficiency of facilities for sewage treatment plants are solved effectively. Experimental results show that sewage treated by the sewage treatment method can reach the first-class A sewage discharge standard (GB18918-2002). The invention further provides an adjustable biological membrane-activated sludge sewage treatment device. The device can flexibly treat the sewage with a low, medium or high concentration and distribute inlet water; an external carbon source is not needed, and the operation costs of the sewage treatment plants are reduced; the problem of sludge age contradiction can be solved effectively, the higher nitrogen and phosphorus removal capability is realized, and the problems of redundancy and deficiency of the facilitiesfor the sewage treatment plants are solved effectively.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an adjustable biofilm-activated sludge sewage treatment method and device. Background technique [0002] Traditional sewage treatment systems mainly include two process types: activated sludge process and biofilm process. The activated sludge method uses sludge-like flocs (in suspension) mainly composed of bacteria micelles to oxidize and decompose organic matter in sewage to achieve the purpose of improving sewage water quality. However, for low-concentration sewage, the system cannot provide sufficient nutrients for microorganisms, resulting in problems such as substandard effluent quality and sludge bulking. At the same time, the nitrification in the aerobic section needs to maintain a high number of nitrifying bacteria, but the nitrifying bacteria are chemoautotrophic bacteria, the growth cycle is slow, and a long sludge age is required to ensure the nitrification; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/04
CPCC02F9/00C02F11/04C02F2001/007C02F3/28C02F3/30C02F3/286C02F3/12C02F3/02C02F1/28C02F1/281C02F2301/08
Inventor 罗涛
Owner 尚川(北京)水务有限公司
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