An experimental study of low concentration sludge settling velocity under turbulent condition

被引：31

作者：

Guo, Lisha ^{[1
]}

Zhang, Daijun ^{[1
,3
]}

Xu, Danyu ^{[2
]}

Chen, Yuan ^{[1
]}

机构：

[1] Chongqing Univ, Dept Environm Sci, Chongqing 400030, Peoples R China

[2] Tianjin Acad Environm Sci, Tianjin 300191, Peoples R China

[3] State Minist Educ, Key Lab Resource Exploitat & Environm Disaster Co, Chongqing 400030, Peoples R China

来源：

WATER RESEARCH | 2009年 / 43卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Low concentration sludge; PIV; Sludge settling velocity; Turbulence intensity; WATER TREATMENT PLANTS; FLOCCULATION; DENSITY; SIZE; MODEL; SHEAR; SIMULATION; BALANCE; TANKS; FLOW;

D O I：

10.1016/j.watres.2009.02.032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Particle Image Velocimetry (PIV) was used to study the settling of activated sludge flocs under turbulent flow conditions. Experimental results showed that a larger particle diameter led to a higher settling velocity while the higher turbulence intensity led to lower settling velocity. Based on the measurements a mathematical relation has been derived which correlates the settling velocity for individual sludge flocs under turbulent conditions through a modified Vesilind equation. Settling velocity shows a power-type relation to sludge particle diameter and an exponential-type relation with turbulence intensity and sludge concentration. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2383 / 2390

页数：8

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