优势菌技术处理难降解石化废水研究

Application of dominant bacteria technology in refractory petroleum chemical wastewater treatment

以天津某石油化工厂的废水为处理对象,应用优势菌技术,采用正交试验方法,对优势菌投加量、投加方式、水质pH值、营养物质的投加进行了分析比较,通过对处理后出水的CODCr、SS值进行分析,得出最优组合即菌剂投加质量分数为2%、采用分段投加方式、pH为5.5、同时投加N、P营养物质.通过采用该最优组合与普通活性污泥法比较得出,投加优势菌后,出水CODCr值有显著下降,去除率明显升高,说明采用优势菌剂能够明显提高活性污泥系统降解该类污水的能力.

Aiming at the wastewater characteristics of a petrochemical plant in Tianjin, dominant bacteria technology is adopted to handle the wastewater, and the optimum conditions are got by comparison of the change of CODCr, SS through orthogonal experiment. The best condition is found with bacteria content of 2%, adding by several times, pH of 5.5 , adding N,P at the same time. And then through the comparison of the optimal combination with conventional activated sludge method, it is found that the removal rate of CODCr increases significantly. The experiments show that the dominant bacteria technology can improve the capacity for degrading such sewage in active sludge system significantly.