Anaerobic digestion and dewatering characteristics of mechanically disintegrated excess sludge

被引:62
作者
Kopp, J
Muller, J
Dichtl, N
Schwedes, J
机构
[1] Tech Univ Braunschweig, Inst Sanitary Engn, D-38106 Braunschweig, Germany
[2] Tech Univ Braunschweig, Inst Mech Proc Engn, D-38106 Braunschweig, Germany
关键词
anaerobic digestion; cell disruption; dewaterability; excess sludge; high-pressure homogenizer; mechanical disintegration; particle size distribution; polymer-demand; pollution of sludge water; stirred ball mill;
D O I
10.1016/S0273-1223(97)00694-X
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Mechanical cell disintegration and its influence on anaerobic digestion was investigated using four different methods. Methods to describe the degree of cell-disruption were developed and the release of organic components into the sludge water was measured. The best results Cere optained using a stirred ball mill and a high-pressure homogenizer. The influence of disintegration rate and digestion time on the performance of the anaerobic process and the dewatering characteristics were investigated. The degradation is accelerated and the digestion time can be reduced, especially when using immobilised microorganisms. It could be shown that the mechanical disintegration results in a disruption of particle structure and an increase of polymer-demand As a result of better anaerobic degradation the density and dewatering results of disintegrated sludges are improved in comparison to non-treated sludges. (C) 1997 IAWQ. Published by Elsevier Science Ltd.
引用
收藏
页码:129 / 136
页数:8
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