厌氧好氧组合工艺处理高含盐化工废水

为进一步解决高含盐化工废水的达标排放问题,以适应更高要求的排放标准,本文采用＂厌氧水解-好氧活性污泥-接触氧化＂工艺对某化工厂排出的高含盐废水进行处理,并对各处理阶段不同水力停留时间的处理效果进行研究,确定最佳的工艺运行条件.实验结果表明：当进水盐度为1%～2%、COD为300～700,mg/L时,厌氧水解池、好氧活性污泥池和接触氧化池的水力停留时间（HRT）分别为8,h、16,h和15,h,工艺出水COD低于100,mg/L,COD去除率维持在72%～92%,为高含盐化工废水处理厂的升级改造提供了一条可行的途径.

Hypersaline Chemical Wastewater Treatment by Aerobic and Anaerobic Process

The process of anaerobic hydrolysis-aerobic activated sludge-contact oxidation was used in the treatment of the chemical waste water with high salt in order to meet the higher requirements of emission standards in this paper.The treatment efficiencies of different units under different hydraulic resident times were researched and the optimum conditions were determined.The salinity of the wastewater was 1%～2% and the chemical oxygen demand（COD）was 300～700 mg/L.The hydraulic retention time（HRT）of anaerobic hydrolysis tank,the aerobic activated sludge tank and oxidation pond were 8 h,16 h and 15 h.The experiment result showed that COD of the effluent water was below 100 mg/L and the removal rate remained at 72%～92%.And this paper provides a feasible way for the upgrading of high saline chemical wastewater treatment plant.