Enhancement of anaerobic sludge digestion by ultrasonic disintegration

被引：101

作者：

Neis, U ^{[1
]}

Nickel, K ^{[1
]}

Tiehm, A ^{[1
]}

机构：

[1] Tech Univ Hamburg Harburg, Dept Sanitary Engn, D-21071 Hamburg, Germany

来源：

WATER SCIENCE AND TECHNOLOGY | 2000年 / 42卷 / 09期

关键词：

anaerobic degradation; cavitation; sludge hydrolysis; sludge stabilization; ultrasonic disintegration;

D O I：

10.2166/wst.2000.0174

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biological cell lysis is known to be the rate limiting step of anaerobic sludge stabilization. Shear forces generated by high-power ultrasound can be used to disintegrate bacterial cells in sewage sludge. Thus the quantity of bioavailable dissolved organic substrate (Chemical Oxygen Demand) is significantly increased. As a result the subsequent sludge degradation is accelerated considerably. In our tests the fermentation process of sonicated waste activated sludge remained stable even at a very short digestion time of 4 days. The enhanced degradation rate resulted in a reduced volatile solids concentration of the digested sludges after the usual fermentation times.

引用

页码：73 / 80

页数：8

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