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Advanced treatment process of coking waste water by combining ozone oxidation method and membrane separation technology

A coking wastewater and advanced treatment technology, applied in the direction of oxidation water/sewage treatment, aerobic and anaerobic process treatment, adsorption water/sewage treatment, etc., can solve high cost, failure to achieve the purpose of reuse, complex regeneration process, etc. problems, achieve the effects of saving land, realizing reuse, and increasing sludge concentration

Inactive Publication Date: 2010-07-28
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC +1
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Problems solved by technology

The advanced treatment of coking wastewater generally adopts sand filtration, biological filter, coagulation treatment and other means. Although the COD of the effluent is controlled at about 100mg / L and the content of suspended solids is about 30mg / L, it cannot meet the water quality requirements of production water purification. ; Some use activated carbon filtration, which can effectively remove COD and suspended solids in water, so that COD can be reduced to below 60mg / L, and the content of suspended solids is below 5mg / L, but it has almost no effect on the dissolved solid salt content. , Activated carbon loses its effect after adsorption and saturation, the regeneration process is more complicated, and the cost is higher, so only a single activated carbon filter unit cannot achieve the purpose of recycling and has no promotion value

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  • Advanced treatment process of coking waste water by combining ozone oxidation method and membrane separation technology
  • Advanced treatment process of coking waste water by combining ozone oxidation method and membrane separation technology

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example 1

[0052] Example 1: For a coking plant with an annual output of 1.5 million tons of coke, 76m of coking wastewater is produced 3 / h, circulating water sewage 52m 3 / h, the accumulative treated water volume is 128m 3 / h. The biochemical system adopts A / O internal circulation biological denitrification treatment technology, and the MBR water production is 128m 3 / h, water quality: CODCr≤120mg / L, NH 3 -N≤5mg / L, SS≤5mg / L, phenol≤0.5mg / L, cyanide≤0.5mg / L, meeting the national comprehensive discharge secondary standard. Then through pressurized pumping to the ozone contact oxidation tower and the O produced from the ozone generator 3 Fully contact to complete the oxidative decomposition treatment of pollutants such as COD that is difficult to biodegrade, and then remove unconsumed or excess ozone, partially soluble COD and a certain chromaticity through an activated carbon adsorption tower. After the activated carbon adsorption tower effluent is pressurized in series by the rever...

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Abstract

The invention relates to an advanced treatment process of coking waste water, which is characterized in that MBR (Membrane Bio-Reactor) treatment, ozone contact oxidation treatment, activated carbon adsorption treatment and reverse osmosis membrane treatment of the coking waste water after pretreatment and A / O biochemical treatment are sequentially carried out to satisfy the water quality requirement of makeup water for producing clean circulating water, and a small amount of concentrated solution can be sprayed to a coal yard for dust fall and dust prevention and also can be used as the makeup water for wet quenching. The invention has the advantages that the biochemical sludge concentration and the volume load of a biochemical reaction pond are improved, coagulation treatment is cancelled, and occupied land is saved; outlet water can be directly recycled as the makeup water for a system for producing the clean circulating water, and the reutilization of a water resource and the zero emission of the coking waste water are realized.

Description

technical field [0001] The present invention relates to a treatment process of coking wastewater, in particular to a method for advanced treatment of coking wastewater by combining advanced oxidation method and membrane separation technology, aiming to provide a method that can greatly reduce various types of pollution in coking wastewater A new technology for the advanced treatment of coking wastewater with high content of waste. Background technique [0002] At present, A / O biological denitrification treatment technology is generally used in the treatment of coking wastewater. The water quality index after treatment can reach the discharge standard stipulated by the state, and part of it can be reused as supplementary water for turbid circulating water systems such as wet coke quenching, dust removal, and gas water sealing. . The advanced treatment of coking wastewater generally adopts sand filtration, biological filter, coagulation treatment and other means. Although the...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/44C02F1/78C02F1/28
Inventor 张一红尹君贤杜连喜
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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