微生物絮凝剂产生菌的筛选

Screening of Bioflocculant-Producing Bacteria

从含有大量微生物菌群的土壤和活性污泥中筛选获得性能稳定、对高岭土悬浮液的絮凝率达90%以上的菌株8株。其中编号为LA6的菌株培养液对高岭土悬浮液的絮凝率达99%以上。该菌在实验室培养条件下,以接种量0.5ml/50ml,种龄8h,温度30℃,摇床转速为160r/min,培养时间72h可达最高絮凝活性。以高岭土和CaCl2作为助凝剂的LA6培养液对含亚甲基蓝10mg/l的溶液的脱色率10min可达到90.32%。

Eight strains of bioflocculant_producing bacteria are isolated from the activated sludge and soil samples. Their culture broths possessed the high ability to flocculate kaolin suspension in the presence of 10 g/l CaCl_2. Based on the flooculating activity, the strain LA6 is singled out, whose culture broth boasts the greatest flocculating activity after 72 hours of cultivation in the fitting medium.