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Sewage treatment method based on MBR process

A sewage treatment method and sewage technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve problems such as occupation of land resources, infiltration into rivers, soil pollution, etc. Achieve the effect of reducing pollution, fast fermentation rate and high COD removal rate

Active Publication Date: 2021-06-11
HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the annual output of perishable garbage in our country is increasing unprecedentedly. If perishable garbage is not treated, it will occupy land resources, and produce toxic and harmful by-products along with decay, which will also cause soil pollution; perishable garbage is prone to leakage when stored and stacked. The filtrate seeps into the river, causing water pollution; the organic matter of perishable garbage is decomposed by microorganisms to produce NH 3 、H 2 Harmful gases such as S, thus causing air pollution

Method used

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  • Sewage treatment method based on MBR process
  • Sewage treatment method based on MBR process
  • Sewage treatment method based on MBR process

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for treating perishable garbage fermented sewage,

[0042] Pre-treatment of perishable garbage: remove non-degradable debris from perishable garbage, add water at a temperature of 40°C, stir to make grease and fine debris float to the surface of the water body for removal, repeat 3 times, transfer to a pulverizer after water removal, After being pulverized and polished, the perishable garbage is uniformly crushed; the perishable garbage is food waste, which contains food solid residues such as steamed bread, rice, noodles, meat, protein and vegetables, and non-degradable debris is bones, paper, etc. Chips, wooden chopsticks, spoons and other sundries, the amount of water added is 500wt% of perishable garbage.

[0043] Anaerobic fermentation of perishable garbage: Add distilled water to the uniformly crushed perishable garbage, mix well and add to the fermentation tank. The fermentation process is mechanically stirred at a stirring speed of 100r / min, and ferment...

Embodiment 2

[0047] Compared with Example 1, this example differs only in that in sewage treatment, the amount of petogenin added is 1 wt% of the fermented liquid of perishable garbage.

Embodiment 3

[0049] Compared with Example 1, this example differs only in that in sewage treatment, the amount of petogenin added is 2wt% of the fermented liquid of perishable garbage.

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Abstract

The invention discloses a sewage treatment method based on an MBR technology, and belongs to the technical field of MBR sewage treatment. The sewage treatment method comprises the steps that perishable garbage is fermented to obtain perishable garbage fermentation liquor, the COD in the perishable garbage fermentation liquor is 100-200 g / L, and the SCOD in the perishable garbage fermentation liquor is 60-120 g / L; the perishable garbage fermentation liquor is used for treating sewage in the MBR process, the MBR process comprises anaerobic section treatment, aerobic section treatment and membrane section biochemical treatment, and in order to improve the sewage treatment effect, bergenin can also be added in sewage treatment. Clear water obtained after the sewage obtained by the method is treated is high in the COD removal rate, and the COD removal rate after the sewage is treated is 93% or above; clear water obtained after sewage treatment is high in the total nitrogen removal rate, and the total nitrogen removal rate after sewage treatment is 72% or above; and the obtained sludge particles are large, pollution to the membrane is reduced, the average particle size of the sludge particles in the aerobic tank is 50-55 microns, and the d10 value of the sludge is 6.5-8.0 microns.

Description

technical field [0001] The invention belongs to the technical field of MBR sewage treatment, and in particular relates to a sewage treatment method based on an MBR process. Background technique [0002] Membrane Biological Reactor (MBR for short) is a biochemical reaction system that combines membrane separation technology with traditional sewage biological treatment systems. It organically combines the solid-liquid separation technology based on ultrafiltration or microfiltration with the biological treatment technology based on traditional activated sludge method, which significantly improves the effluent quality and the stability of the process, and at the same time, due to the retention effect of the membrane The hydraulic retention time of refractory substances is improved, and the removal effect of the system is enhanced. [0003] Microbial denitrification requires the use of carbon sources. From the perspective of the actual sewage biological denitrification process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/12C02F1/44
CPCC02F3/30C02F3/1268C02F1/44C02F2209/08C02F2209/16Y02W10/10
Inventor 徐坚麟付源王振娥
Owner HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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