Toxicity of Selected RCRA Compounds to Activated Sludge Microorganisms

A modified OECD Method 209, "Activated Sludge, Respiration Inhibition Test," was applied to 33 compounds on the RCRA list that have been found in municipal wastewaters. Fifteen of the compounds had ${\rm EC}_{50}$ values (concentrations reducing the oxygen consumption rate to 50% of the co...

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Bibliographic Details
Published in:	Journal - Water Pollution Control Federation 1988-10, Vol.60 (10), p.1850-1856
Main Authors:	Volskay, V. T., Grady, C. P. Leslie
Format:	Article
Language:	eng
Subjects:	Activated sludge Biological and medical sciences Biological treatment of waters Biotechnology Chemical water pollution Environment and pollution Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Kinetics Microorganisms Oxygen Oxygen consumption Resource Conservation and Recovery Act Respiration Solubility Wastewater
Online Access:	Get full text
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Summary:	A modified OECD Method 209, "Activated Sludge, Respiration Inhibition Test," was applied to 33 compounds on the RCRA list that have been found in municipal wastewaters. Fifteen of the compounds had ${\rm EC}_{50}$ values (concentrations reducing the oxygen consumption rate to 50% of the control) less than 1000 mg/L or below their solubility limit if it was lower. Seven had ${\rm EC}_{50}$ values greater than 1000 mg/L, and 11 had ${\rm EC}_{50}$ values in excess of their solubility limits. The use of dimensionless inhibition plots revealed that many of the inhibitory compounds could be characterized by simple linear, reversible, inhibition models.
ISSN:	0043-1303 2327-7467