Effects of air diffuser arrangement on hydrodynamics and oxygen transfer in activated sludge aeration tanks

被引：7

作者：

Fujie, K

Kasakura, T

Tsuchiya, K

Tomita, Y

机构：

[1] UNIV TOKUSHIMA,DEPT CHEM SCI & TECHNOL,TOKUSHIMA 770,JAPAN

[2] NGK INSULATORS LTD,MIZUHO KU,NAGOYA,AICHI 467,JAPAN

来源：

ENVIRONMENTAL TECHNOLOGY | 1997年 / 18卷 / 06期

关键词：

activated sludge aeration tank; oxygen transfer performance; air diffuser arrangement; spiral flow aeration; total floor coverage arrangement;

D O I：

10.1080/09593331808616585

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Effects of air diffuser arrangement as well as tank geometry on the spiral liquid circulation rate, i.e., the liquid ascending velocity in the bubbling zone, and on the gas-liquid oxygen transfer performance were investigated based on a theoretical analysis of the data obtained in commercial-scale activated sludge aeration tanks. IL is ascertained that the total floor coverage arrangement of air diffusers on the bottom of the tanks is effective in hindering the spiral liquid circulation and in enhancing the gas-liquid oxygen transfer.

引用

页码：663 / 668

页数：6