摘要
通过超声系列试验,对超声法从剩余污泥中提取微生物絮凝剂(MBF)进行了系统研究.从剩余污泥中提取的MBF在偏酸性条件下和35～40℃范围内表现出较高的絮凝活性.超声时间以1～3min为宜,超声功率以210～270 W为宜.污泥浓度越高,所提取的MBF浓度越高;对于从高浓度污泥提取的MBF,投加剂量可随污泥浓度升高而减小,以获得较好的絮凝效果.MBF主要成分包括蛋白质、多糖和核酸.研究结果表明,超声法可用于从剩余污泥中直接提取MBF,在降低MBF生产成本的同时实现污泥的资源化利用.
Microbial flocculant （MBF） extraction from excess sludge by ultrasonic method was systematically studied. The MBF extracted from excess sludge showed higher flocculating activity under acidic conditions and 35-40℃. The optimum ultrasonic time and power were 1--3 min and 210-270 W, respectively. The concentration of the extracted MBF from the sludge by ultrasonic method increased with the rising sludge concentration. To get the best flocculation efficiency, MBF dosage can be decrease with the rising sludge concentration. The main components of MBF consisted of proteins, polysaccharides, and nucleic acids. According to the results, ultrasonic method is feasible to extract MBF from excess sludge, which can not only save the cost of MBF production, but also realize the resource reuse of excess sludge.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第2期234-239,共6页
Journal of Tongji University:Natural Science
基金
国家自然科学基金(51008218)
中央高校基本科研业务费专项资金
教育部留学回国人员科研启动基金
国家"八六三"高技术研究发展计划(2009AA062902)
关键词
剩余污泥
微生物絮凝剂
超声法
絮凝活性
excess method
flocculating sludge
microbial flocculant
ultrasonic activity
