摘要:为满足新排放标准的要求,采用O/A/O/O工艺对某焦化厂原有的A~2/O~2工艺进行改造,通过增设预曝气和初沉池,及初沉池污泥回流至预曝气池,强化了预处理。经过预曝气和沉淀处理,焦化废水的COD去除率达到40%,氨氮浓度升高约10%,废水中硫氰化物和氰化物基本被去除,降低了对后续生化处理的影响。改造完成后,整个系统被优化,运行更加稳定,加药成本下降了25%,出水稳定达到HJ 2306-2018《炼焦化学工业污染防治可行技术指南》的要求。
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