污染控制技术及原理
封培,王世梅,周立祥.生物絮凝剂产生菌的分离鉴定及其在饮用水除浊上的作用[J].环境科学学报,2009,29(8):1666-1671
生物絮凝剂产生菌的分离鉴定及其在饮用水除浊上的作用
- Isolation,identification of a bioflocculant-producing bacterium and its application in drinking water purification
- 基金项目：国家自然科学基金(No.20377023)
- 作者
- 单位
- 封培
- 南京农业大学资源与环境科学学院环境工程系, 南京 210095
- 王世梅
- 南京农业大学资源与环境科学学院环境工程系, 南京 210095
- 周立祥
- 南京农业大学资源与环境科学学院环境工程系, 南京 210095
- 摘要：从活性污泥中筛选分离到一株高效生物絮凝剂产生菌F1,鉴定为克雷伯氏菌属(Klebsiella sp.).对其所产生物絮凝剂MBF1进行初步提取,考察了MBF1对长江原水浊度的去除效果.结果表明,在对长江原水处理中絮凝剂MBF1用量为40mg·L-1时,长江原水浊度和CODCr从处理前的56.2NTU和42.67mg·L-1下降到0.6NTU和13.47mg·L-1,去除率可达到99.0%和68.4%,处理
- Abstract：Removal of turbidity and COD through coagulant sedimentation with a chemical flocculant is an important process for the purification of drinking water extracted from surface water. Here we report the role of the bio-flocculant MBF1 (obtained from bioflocculant-producing strain F1,isolated from activated sludge and identified as a Klebsiella sp),in Yangtze River water purification. The addition of MBF1 at a dosage of 40 mg·L-1 in the selected Yangtze River water sample led to 99.0% turbidity removal from an initial 52.6 NTU to a final 0.6 NTU and 68.4% CODCr removal from the initial 42.67 mg·L-1 to final 13.47 mg·L-1. In comparison with polyaluminium chloride (PAC) and polyacrylamide (PAM) ( two conventional chemical flocculants widely applied in the purification of drinking water-the bioflocculant MBF1 had a higher flocculation ability even at the low dose of 40 mg·L-1; broad adaptability over a working pH range from 1 to 10 and a working temperature range from 0 to 45℃; and only common mixing requirements. Toxicological testing with small white mice fed with MBF1 showed no acute toxicity by MBF1. Thus,MBF1 can be used as a flocculant in drinking water purification.
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