一株新型絮凝剂产生菌的筛选及其特性研究

从淤泥中分离到了一株絮凝剂新型产生菌AY11,初步鉴定为德克斯氏菌属。该菌能以廉价的蔗糖为碳源、尿素为氮源,发酵1d生产高效絮凝剂,该絮凝剂对高岭土悬浊液的絮凝率可达96.08%(投加量为2%)。在pH值6～12,温度20～80℃范围内该絮凝剂均可获得较佳的絮凝效果。AY11所产絮凝剂对城市生活污水、日用化工厂废水、染料废水等多种废水均有很好的净化、脱色效果。

Screening of a new flocculant producing strain and its characteristics

A new flocculant-producing strain AY11 was isolated from silt,and was preliminarily identified as Derxia.With sucrose as carbon source,carbamide as nitrogen source,after 1 d of ferment,the said strain can produce high-efficient flocculant,and the flocculation rate of kaolin suspension by the flocculant can reache 96.08%(the dosage of the flocculant is 2%).The optimal flocculation result can be obtained when pH value is 6-12,temperature is 20-80 ℃.The flocculant produced by AY11 has an excellent effect in purifying and decoloring various kind of wastewater,such as urban living sewage,daily chemical plant wastewater and dye wastewater,etc.