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%.
作者
姜宇
鲍立宁
朱曙光
董欣琦
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)
出处
《安徽农业大学学报》
CAS
CSCD
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
关键词
生物絮凝剂产生菌
筛选
絮凝率
bioflocculant-producing strain
screening
flocculation rate
