Effect of Low Dissolved Oxygen Concentration on Effluent Turbidity

A bench-scale study was conducted to investigate the production of turbid effluents in activated sludge plants operated at extremely low dissolved oxygen (DO) concentrations. Turbidity increased when DO was lowered from 5 to approximately 0.4 mg/L as a result of inhibition of exocellular polymer pro...

Full description

Saved in:

Bibliographic Details
Published in:	Journal - Water Pollution Control Federation 1984-01, Vol.56 (7), p.837-843
Main Authors:	Starkey, J. E., Karr, P. R.
Format:	Article
Language:	eng
Subjects:	Activated sludge Aeration Air flow Applied sciences Biological and medical sciences Biological treatment of waters Biotechnology Colloids Environment and pollution Exact sciences and technology Fundamental and applied biological sciences. Psychology General purification processes Industrial applications and implications. Economical aspects Oxygen Plant Operations Pollution Polymers Suspended solids Turbidity Viability Wastewaters Water pollution Water treatment and pollution
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	A bench-scale study was conducted to investigate the production of turbid effluents in activated sludge plants operated at extremely low dissolved oxygen (DO) concentrations. Turbidity increased when DO was lowered from 5 to approximately 0.4 mg/L as a result of inhibition of exocellular polymer production and, to a lesser extent, inhibition of the eucaryotic population (protozoa and rotifers). The greater the influent colloidal loading, the greater the effect of DO on effluent turbidity. Colloidal solids responsible for the increased turbidity seemed to be primarily those entering the aeration basin and not being removed, rather than those created within the basin.
ISSN:	0043-1303 2327-7467