Fenton反应-中和-厌氧生物法处理某高盐度工业废水

摘要

The treatment method of high - salinity wastewater by combining Fenton reaction, neutralization, anaerobe degra- dation was studied in this paper. Under the optimum conditions, the COD removal rates were 46. 26% , 15.05% and 71.32% , respectively after three steps. After the combination degradation process, the output water could meet the National standard 3 for industrial wastewater discharges (GB8978 - 1996, COD ≤500 mg/L).%实验采用Fenton反应-中和-厌氧菌法处理某高盐度工业废水，考察了各因素对COD去除率的影响。实验结果表明，Fenton反应处理该工业废水的最佳条件是：n（H202）：n（COD）=2：1，n（H202）：n（Fe2＋）=4：1，pH=3，反应时间采用120min。Fenton处理后废水COD由24230mg／L下降到13020mg／L，去除率达到46．26％；所得反应液用Ca（OH），中和沉淀后COD值降低到11060mg／L，去除率为15．05％；最后废水经稀释后进行厌氧茵降解处理，COD为1625mg／L的废水经厌氧菌6天处理后降为466mg／L，去除率为71．32％，达到GB8978—1996中规定的COD三级排放标准。