焦化废水含有大量有机污染物和有毒无机物,成分十分复杂,污染物色度高,属较难降解的高浓度有机工业废水.经预处理和生化处理后的焦化废水存在COD、氨氮、总氮及氰化物不达标的问题.通过高级氧化法、混凝沉淀法、吸附法、膜分离法、生物化学法以及组合工艺等深度处理方法可以使出水满足新标准的要求.介绍了目前国内焦化废水深度处理的工艺现状以及展望.
The coking-plant wastewater contains lots of organic contaminants and toxic inorganic contaminants. This kind of highly concentrated organic industrial wastewater is hard to be biodegraded due to its complex components and high chroma. COD,NH3-N,total nitrogen and the contents of cyanide can not meet the standard after pretreated and bio-chemical treatment. Advanced oxidation process,coagulation sedimentation method,adsorption method,membrane sepa-ration method,biological chemical method and their combined process can make the effluent meet the requirements of the new standard. In addition,the present status of advanced treatment processes of coking wastewater in China are described and prospected.
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