SURFACE OF ACTIVATED SLUDGE PARTICLES IN RELATION TO THEIR SETTLING CHARACTERISTICS

被引：39
作者：
FORSTER, CF
机构：
[1] Department of Microbiology, University College, Cardiff, Wales
来源：
WATER RESEARCH | 1968年 / 2卷 / 11期
关键词：
D O I：
10.1016/0043-1354(68)90011-0
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Very little work has been reported which relates the surface properties of sewage sludges to their dewatering characteristics. The measurement of the electrophoretic mobility of activated sludge particles was therefore included in the analysis of routine samples from a Lübeck pilot-plant. These measurements were made in a rectangular cell of the type described by James (1957). In constant ionic strength buffer solutions (I = 0·2) no correlation was found between either the iso-electric points or the pK values of the sludge surfaces and the sludge volume index. Mobility measurements of the sludge particles in their own liquors however, showed that the average mobility was directly proportional to the sludge volume index, which in turn was a logarithmic function of the ratio of ammonia-nitrogen to soluble phosphate in the liquors. This would appear to indicate that the settling characteristics of activated sludges are governed by some metabolic process which can alter the nature of the surface of the sludge particles. © 1968.
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页码：767 / &
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