焦化废水处理方法的研究进展

Research progress of coking wastewater treatment

焦化废水是国内外工业废水处理领域的难题。目前,国内外对焦化废水中酚、氰等有毒物质的处理,生物活性污泥法是一个比较普遍有效的方法。但对其中NH3-N、氟化物、COD等去除效果较差,难以满足外排要求,因此,国内外对焦化废水处理工艺和净化技术改进进行很多研究,不同国家有自己特点,操作、运行、测试和监控等技术也更多地向节能、经济、高效和实用方向发展。焦化废水的最终排放,视本国国情、地质环境、环保法规以及当地生态状况而定。总体而言,我国焦化废水的治理水平与国外基本相当,但仍存在一定差距。

coking wastewater is a difficult problem in the field of industrial wastewater treatment at home and abroad. At present,the biological activated sludge process is a common and effective method for the treatment of phenol and cyanide in coking wastewater. But for the NH3-N,COD,fluoride removal is poor,it is difficult to meet the discharge requirements,therefore,at home and abroad on the coking wastewater treatment process and improve a lot of research technology purification,different countries have their own characteristics,operation,operation,testing and monitoring technologies are more energy-efficient,economic,efficient and practical direction. The final discharge of coking wastewater depends on the national conditions,geological environment,environmental regulations and local ecological conditions. In general,the level of coking wastewater treatment in China is basically the same as that in foreign countries,but there is still a certain gap.