絮凝剂产生菌的筛选及其培养条件优化

Screening of a Flocculant-Producing Strain and\= Optimization on Its Cultural Conditions

从活性污泥中筛选到１３株产絮凝剂的菌株，经复筛得到１株具有较高絮凝活性的菌，初步鉴定为假单胞菌ＰｓｅｕｄｏｍｏｎａｓｓｐＧＸ４－１。该菌产絮凝剂的适宜培养基及培养条件如下：葡萄糖２％，酵母膏０４％，ＫＨ２ＰＯ４０４％，ｐＨ７．０～９．０，３０℃，２００ｒ／ｍｉｎ，摇床培养２～３ｄ。产生具有高絮凝活性的絮凝剂，对高岭土悬液的絮凝率最高可达９２７％

strains of microorganisms which were found to produce flocculant were isolated from activated sludge. After rescreening, a strain Pseudomonas GX4-1 with high flocculating activity was obtained. The optimum culture conditions are:glucose 2%, yeast extraction 0.4%, KH2PO4 0.4%,30 , 200 r/min, cultivated for 23 days in flakes. The strain produces a strong-activity flocculant, with flocculating rate of 92.7% against kaolin clay suspension, under optimum flocculation conditions.