Treatment of biological reactor for coking sewage membrane

A membrane bioreactor, coking sewage technology, applied in sustainable biological treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of complex regeneration process, high cost, unable to meet water quality requirements, etc. Achieve the effect of increasing volume load, realizing reuse, and saving land.

Active Publication Date: 2006-05-31
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Sand filtration is generally used for the advanced treatment of coking sewage. After treatment, the COD of sewage is still about 100-150mg / L, and the content of suspended solids is about 30mg / L, which cannot meet the water quality requirements for production water purification; some use activated carbon filtration, which can Effectively remove COD and suspended solids in water, reduce COD to below 70mg / L, and the content of suspended solids to below 30mg / L, but activated carbon loses its effect after adsorption and saturation, the regeneration process is more complicated and the cost is higher

Method used

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  • Treatment of biological reactor for coking sewage membrane

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Embodiment 1

[0012] Raw sewage volume is 50m 3 / h, enter the biochemical treatment stage after pretreatment and degreasing. The biochemical treatment adopts the A / O external cycle biological denitrification process, and the sludge concentration in the aerobic biological pool is kept at 8g / L; the sludge load of the membrane bioreactor is 0.45kgCOD / kgMLVSS·d and 0.05kgTKN / kgMLVSS·d, the volume load is 2kgCOD / m 3 ·d and 0.2kgTKN / m 3 d; The aerobic effluent is filtered by the curtain microfiltration membrane installed in the membrane pool, and the total area of ​​the microfiltration membrane is 4800m 2 , the water out of the membrane is sucked by pump negative pressure, the pressure is -0.02MPa, the water temperature is 20°C, and the water flux through the membrane is 10L / h·m 2 , the effluent enters the reuse pool after treatment. The curtain microfiltration membrane is equipped with 10 membrane boxes, and each membrane box contains 24 membrane elements (20m 2 / piece), 8 membrane boxes wo...

Embodiment 2

[0015] Raw sewage volume is 50m 3 / h, enter the biochemical treatment stage after pretreatment and degreasing. The biochemical treatment adopts the A / O external cycle biological denitrification process, and the sludge concentration in the aerobic biological pool is kept at 10g / L; the sludge load of the membrane bioreactor is 0.3kgCOD / kgMLVSS·d and 0.03kgTKN / kgMLVSS·d, the volume load is 2.7kgCOD / m 3 ·d and 0.28kgTKN / m 3 d; The aerobic effluent is filtered by the curtain ultrafiltration membrane installed in the membrane pool, and the total area of ​​the ultrafiltration membrane is 5000m 2 , the water out of the membrane is sucked by pump negative pressure, the pressure is -0.03MPa, the water temperature is 20°C, and the water flux through the membrane is 15L / h·m 2 , the effluent enters the reuse pool after treatment. The curtain ultrafiltration membrane is equipped with 10 membrane boxes, and each membrane box contains 24 membrane elements (20m 2 / piece), 8 membrane boxes...

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Abstract

A treatment of coking sewage membrane biological reactor consists of pretreatment, biochemical treatment, after-treatment water recovery and utilization. Membrane biological reactor is set in anoxic biological pool, the reactor consists of oxygen biological pool and membrane pool. The process is carried out by mud and water separating for curtain micro-filter membrane or super-filter membrane substituting secondary settling basin and removing high-molecular lysate to decrease outfall COD. Its advantages include higher mud concentration and volume load, and floor-area saving. It can be used to recover and utilize production circulating water system and coked sewage zero displacement.

Description

technical field [0001] The invention relates to a treatment process of coking sewage, in particular to a process for advanced treatment of coking sewage by using a membrane bioreactor. Background technique [0002] At present, A / O biological denitrification treatment technology is generally used in coking sewage treatment. The water quality index of treated sewage can meet the discharge standards stipulated by the state, and part of it can be reused in wet coke quenching, dust removal, gas water sealing and other turbid circulating water systems as supplements. water. Sand filtration is generally used for the advanced treatment of coking sewage. After treatment, the COD of sewage is still about 100-150mg / L, and the content of suspended solids is about 30mg / L, which cannot meet the water quality requirements for production water purification; some use activated carbon filtration, which can Effectively remove COD and suspended solids in water, reducing COD to below 70mg / L and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12C02F3/30
CPCY02W10/10
Inventor 尹君贤张一红
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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