微生物絮凝剂BS-5的筛选及其特性

Study on Screening for Flocculant-Producing Strain BS-5 and Its Features

从河水底泥中筛选出一株高效稳定的微生物絮凝剂产生菌BS 5·对该菌培养条件进行优化后,BS 5产生的絮凝剂对高岭土悬浮液的絮凝率可达97 5%·研究了微生物产生菌BS 5培养时间与其培养液絮凝性能的关系,培养液中絮凝活性的分布·以高岭土悬浮液为研究对象,考察了MBFBS 5的用量、pH值对絮凝性能的影响和热稳定性能·结果表明,MBFBS 5具有培养时间短,用量小,pH值应用范围广,热稳定性能高等优点·啤酒废水的净化处理结果表明,BS 5产生的絮凝剂具有良好的絮凝作用,CODCr去除率可达79 2%·

A strain named BS-5 was screened from river bed sludge. Its metabolin has a high and stable flocculability and can be used as a microbial flocculant through proper culture. After optimizing the cultural conditions, the strain produced a highly activated flocculant MBFBS-5 with a flocculating rate up to 97.5% in Kaolin suspension. Then, the relationship of the time for culture to its flocculability and the distribution of the flocculating activity in culture medium was studied. The thermal stability and the effect of MBFBS-5 dosage and pH value on flocculability were also researched in Kaolin suspension. The results showed that it has such advantages as short culturing time, low dosage, wide pH range and high thermal stability. The results of applying it to the wastewater treatment in beer industry indicated that MBFBS-5 has a high flocculability by which the removal rate of COD is up to 79.2%.