甾体药物生产废水的生物处理

Biological Treatment of the Wastewater from Steroid Drug Production

以甾体药物生产废水中的主要污染物为底物,从自然界筛选了高效降懈菌株6株,经鉴定,他们分别为假单胞菌(Pseudomonas sp.)、醋酸杆菌(Acetobacter sp.)和不动杆菌(Acinetobucter sp.)。采用好氧工艺,以筛选出的高效菌株为降解菌,用止交法研究了高效菌降解废水的工艺条件,最佳工艺条件为:菌体质量浓度10g/L(湿),pH 7.0,摇床转速110r/min。影响COD_(cr)去除率的因子顺序为:菌体质量浓度>pH>摇床转速。在最佳工艺条件下,高效菌的COD_(cr)去除率达到94％,出水可达到国家二级污水排放标准。

The 6 highly efficient strains, screened by using pollutants in wastewater from steroid drugs production as the main substrate, were identified as Pseudomonas sp, Acetobacter sp and Acinetobacter sp, respectively. The optimal conditions of strain concentration 10 g/L, pH 7.0 and agitation rate 110 r/ min for aerobic biodegradation of the wastewater were determined by the orthogonal experiments. The factors which influence the rate of COD removal follow the order of strains concentration>pH>rotate speed. Maximum COD removal rate of 94% was achieved by using the optimum conditions, and the final COD of the outflow satisfied the standard for the secondary water.