MEASUREMENT OF CELL-DENSITY AND FLOC PROPERTY OF EXCESS ACTIVATED-SLUDGE CONDITIONED BY FREEZING AND THAWING PROCESS, USING CENTRIFUGAL SETTLING

被引：17

作者：

KAWASAKI, K ^{[1
]}

MATSUDA, A ^{[1
]}

IDE, T ^{[1
]}

MURASE, T ^{[1
]}

机构：

[1] NAGOYA UNIV,DEPT CHEM ENGN,NAGOYA,AICHI 464,JAPAN

来源：

KAGAKU KOGAKU RONBUNSHU | 1990年 / 16卷 / 02期

关键词：

Activated Sludge; Cell Density; Centrifugal Settling; Floc Property; Freezing-Thawing; Sedimentation; Solid-Liquid Separation;

D O I：

10.1252/kakoronbunshu.16.401

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The cell density and dry solids fraction of three kinds of excess activated sludge (unfrozen, fast-frozen and slow-frozen sludges) were evaluated from the equilibrium heights of the sediments under centrifugal settling. These values of the frozen sludges were greater than those of the unfrozen sludge, and therefore it was found quantitatively that the sludge cells were dewatered due to freezing and thawing. Also, the volume fraction of cells in the slow -frozen sludge floc was found to be twice as large as that in unfrozen and fast -frozen sludges. © 1990, The Society of Chemical Engineers, Japan. All rights reserved.

引用

页码：401 / 403

页数：3