EFFECTS OF AIR DIFFUSER ARRANGEMENT ON HYDRODYNAMICS AND OXYGEN-TRANSFER IN ACTIVATED-SLUDGE AERATION TANKS

Authors
FUJIE K KASAKURA T TSUCHIYA K TOMITA Y
Citation
K. Fujie et al., EFFECTS OF AIR DIFFUSER ARRANGEMENT ON HYDRODYNAMICS AND OXYGEN-TRANSFER IN ACTIVATED-SLUDGE AERATION TANKS, Environmental technology, 18(6), 1997, pp. 663-668
Citations number
6
Categorie Soggetti
Environmental Sciences
Journal title
Environmental technology → ACNP
ISSN journal
09593330
Volume
18
Issue
6
Year of publication
1997
Pages
663 - 668
Database
ISI
SICI code
0959-3330(1997)18:6<663:EOADAO>2.0.ZU;2-#
Abstract
Effects of air diffuser arrangement as well as tank geometry on the sp iral liquid circulation rate, i.e., the liquid ascending velocity in t he bubbling zone, and on the gas-liquid oxygen transfer performance we re investigated based on a theoretical analysis of the data obtained i n commercial-scale activated sludge aeration tanks. IL is ascertained that the total floor coverage arrangement of air diffusers on the bott om of the tanks is effective in hindering the spiral liquid circulatio n and in enhancing the gas-liquid oxygen transfer.