Influence of ultrasonic disintegration on the dewaterability of waste activated sludge

被引：79
|
作者：
Wang, F. [1 ]
Ji, M. [1 ]
Lu, S. [1 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Technol, Tianjin 300072, Peoples R China
来源：
ENVIRONMENTAL PROGRESS | 2006年 / 25卷 / 03期
关键词：
biopolymers; sludge dewaterability; extracellular polymeric substances;
D O I：
10.1002/ep.10149
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Ultrasound can be used to disintegrate waste activated sludge (WAS), resulting in changes in sludge dewaterability. To observe and explain the change in sludge dewatering properties before and after ultrasonic disintegration, the specific resistance to filtration (SRF), capillary suction time (CST), content of biopolymers (proteins + polysaccharides), and free water in the sludge before and after disintegration were examined. Despite the degradation of extracellular polymeric substances (EPS), the sludge dewatering properties worsened after disintegration. This result is attributed to two changes in the sludge, one being the effect of the water retained by the biopolymers and the other being the adsorption effect of the fine sludge particles for free water.
引用
收藏
页码：257 / 260
页数：4
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