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
收藏
页码：2383 / 2390
页数：8
相关论文
共 29 条
123