采用水解酸化-复合好氧处理制药工业废水的工艺评价

Evaluation of pharmaceutical industrial wastewater treatment by composite hydrolyze acidification-composite aerobic process

以制药工业综合废水处理为例对其采用的两级水解酸化复合好氧工艺的处理效果进行评估。按常规指标进行评估,该工艺对于制药综合废水的处理效果达到了设计目的,COD去除率可达到78.2%以上,NH+4-N的去除率达到99.3%,出水质量基本满足"污水综合排放标准(GB8978-1996)"二级标准和"辽宁省污水综合排放标准(DB21.1627-2008)";急性毒性的检测表明,经过该工艺处理后出水为低毒性;三维荧光谱分析(EEM)表明,制药综合废水经生物处理后的可溶性有机物中仍然存在难降解物质,建议增加物化处理以提高处理效果;并且制药废水经处理后的出水中的盐度对排入的生态系统存在风险,建议纳入排放标准以加强管理。

As an example,the evaluation of pharmaceutical wastewater treatment by composite hydrolyze acidification-composite aerobic process was carried out. According to the routine indexes,the treatment of pharmaceutical wastewater met the design requirement. The COD and NH+4-N removal efficiency was higher than 78. 2% and 99. 3%,respectively. The effluent from the process met the sewage discharge standard of China( second stage)( GB8978-1996) and sewage discharge standard of Liaoning Province( DB21. 1627-2008). The accurate toxicity detection showed that the effluent was low toxic. However,there was still non-degradable DOM existed in effluent based on EEM analysis. The physical-chemical treatment was suggested as one unit in the process to improve the degradation efficiency.Further,it was a risk for ecosystem which would accept the high salinity effluent. Thus the salinity limitation was suggested to add into the sewage discharge standard to strengthen the management.