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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%,处理后水的两指标达到饮用水标准.同时,比较了生物絮凝剂MBF1与聚合氯化铝、聚丙烯酰胺等化学絮凝剂对长江原水浊度的处理效果,结果发现MBF1具有用量更少(40mg·L-1),适应性广(pH1～10,温度0～45℃条件下都有较好处理效果,且对搅拌程序无特殊要求)及处理效果好的特点.动物急毒性试验表明,该絮凝剂无急毒性反应,在给水处理中具有良好的应用前景.
A strain of high efficient bioflocculant-producing bacterium F1 was screened from activated sludge and identified as Klebsiella sp. The MBF1 flocculant was initially extracted, and the effect of MBF1 on the Yangtze River raw water The results showed that the turbidity and CODCr of the Yangtze River water decreased to 0.6 NTU from 56.2 NTU and 42.67 mg · L-1 before treatment when the amount of flocculant MBF1 was 40 mg · L-1 in the Yangtze River water treatment And 13.47 mg · L-1 respectively, the removal efficiencies reached 99.0% and 68.4%, respectively, and the two indicators of treated water reached the standard of drinking water.Meanwhile, compared the bioflocculant MBF1 with polyaluminum chloride, polyacrylamide and other chemical flocculants The results showed that MBF1 had a lower dosage (40mg · L-1) and wide adaptability (pH1-10, temperature 0 ~ 45 ℃), and had good effect on the stirring process No special requirements) and good treatment effect.Acute toxicity test showed that the flocculant no acute toxicity, water treatment has good application prospects.