关键词: 剩余污泥, 微生物絮凝剂, 絮凝率

Abstract: Use sewage sludge as media materials, process the sewage sludge through a series of conditions aiming to use the treated sewage sludge as the fermentation medium of microbial flocculant producing bacteria. The results showed that alkaline hydrolysis of the sludge at pH 12 was the optimal pretreatment conditions, with maximum output of  carbon and nitrogen. Sterilizing the sludge extract after adding 8 g/L glucose, the microbial flocculant producing bacteria LLin6 could normally produce flocculants, the flocculation rate could reach 91.55%. The present study would provide basis for  reducing the expected cost of bioflocculant preparation and realizing sludge reduction and resources reutilization.

Key words: sludge, microbial flocculants, flocculation rate