[污水污泥中蛋白质和多糖对脱水性能的影响]

[Effect of proteins and polysaccharides in sewage sludge on dewaterability].

作者信息

He Pei-pei, Yu Guang-hui, Shao Li-ming, He Pin-jing

机构信息

Key Laboratory of Yangtze River Water Environment, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

出版信息

Huan Jing Ke Xue. 2008 Dec;29(12):3457-61.

PMID:19256385

Abstract

The thermophilic (55 degrees C) hydrolysis and acidification were conducted in order to investigate the composition and distribution of proteins and polysaccharides and the effect of them on dewaterability of sludge. Sludge flocs were divided into four layers by centrifuge and ultrasound, i.e., slime, loosely bound-extracellular polymeric substances (LB-EPS), tightly bound-EPS (TB-EPS) and cells (Pellet). Results showed that most of proteins and polysaccharides located in pellet. Capillary suction time (CST) during digestion at pH 5.5 was slightly higher than the raw sludge, while CST during digestion at pH 10.0 was markedly higher than the raw sludge. Statistical analysis suggested that CST was affected by soluble proteins and soluble proteins/polysaccharides and virtually no affected by proteins, polysaccharides or proteins/polysaccharides in sludge and other layers except slime.

摘要

进行嗜热（55摄氏度）水解和酸化，以研究蛋白质和多糖的组成与分布及其对污泥脱水性能的影响。通过离心和超声将污泥絮体分为四层，即黏液层、松散结合的胞外聚合物（LB-EPS）、紧密结合的EPS（TB-EPS）和细胞（沉淀）。结果表明，大部分蛋白质和多糖位于沉淀中。在pH 5.5消化期间的毛细吸水时间（CST）略高于原污泥，而在pH 10.0消化期间的CST明显高于原污泥。统计分析表明，CST受可溶性蛋白质和可溶性蛋白质/多糖的影响，而实际上不受污泥和除黏液层外其他层中的蛋白质、多糖或蛋白质/多糖的影响。