生物絮凝剂产生菌的筛选及絮凝活性研究  

Screening of a bioflocculant-producing strain and its flocculating property

作　　者：姜宇 鲍立宁[1,2] 朱曙光 董欣琦[1] JIANG Yu1,2, BAO Lining1,2, ZHU Shuguang1,2, DONG Xinqi1(1. College of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei 230601; 2. Anhui Key Laboratory of Water Pollution Control and Wastewater Reuse, Anhui Jianzhu University, Hefei 23060)

机构地区：[1]安徽建筑大学环境与能源工程学院,合肥230601 [2]安徽建筑大学水污染控制与废水资源化安徽省重点实验室,合肥230601

出　　处：《安徽农业大学学报》2018年第2期296-301,共6页Journal of Anhui Agricultural University

基　　金：国家自然科学基金(51578002);安徽省科技重大专项(16030801118);安徽省高校自然科学研究重大项目(KJ2016SD14)共同资助

摘　　要：从活性污泥中经过初筛复筛得到了一株絮凝率为94.3%的絮凝剂产生菌。对该菌株所产的生物絮凝剂单因素试验结果表明,最佳絮凝条件为:静置时间为3~5 min,生物絮凝剂投加量为2 mL,温度为20℃,pH为7~8、CaCl_2加入量为0.5 mL。对该菌株所产生物絮凝剂的正交试验结果表明,最佳絮凝条件为:发酵液投入量为3 m L、CaCl_2投加量为1 mL,pH为7。同时该絮凝菌在对污水的实际处理中有较好的效果,对COD及NH_3-N去除率分别达到62.35%和61.67%,并且可提高活性污泥沉降性能及脱水率,脱水率可达42%。In this study, a flocculant-producing strain was obtained from the activated sludge after primary and secondary screenings. Its flocculating rate was 94.3%. A single factor experiment was conducted to study the bioflocculant production of the strain. Results showed that the optimum flocculation conditions were as follows： standing time, 3-5 min; bioflocculant, 2 mL; temperature, 20℃; pH 7-8; CaCl2, 0.5 mL. The result of another orthogonal experiment indicated that the optimum flocculation conditions were as folllows： fermentation liquid,3 mL; CaCl2,1 mL; pH, 7. Under these conditions, the strain worked well in a practical sewage treatment with the removal efficiency of COD and NH3-N reaching to 62.35% and 61.67%, respectively. The settling ability of activated sludge was obviously improved and the dewatering rate could reach 42%.

关 键 词：生物絮凝剂产生菌 筛选 絮凝率 

分 类 号：X703[环境科学与工程—环境工程]