Record Display for the EPA National Library Catalog
RECORD NUMBER: 85 OF 265| Main Title | Impact of toxic organic chemicals on the kinetics of acetoclastic methanogenesis / | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Author | Davies-Venn, Christian. ; Young, J. C. ; Tabak, H. H. | |||||||||||
| Other Authors |
|
|||||||||||
| CORP Author | Arkansas Univ., Fayetteville. Dept. of Civil Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. | |||||||||||
| Publisher | U.S. Environmental Protection Agency, Office of Research and Development, Risk Reduction Engineering Laboratory, | |||||||||||
| Year Published | 1990 | |||||||||||
| Report Number | EPA/600/D-90/137; EPA-R-814488-01-3 | |||||||||||
| Stock Number | PB90-263203 | |||||||||||
| Subjects | Sewage--Purification--Biological treatment ; Organic water pollutants ; Methanobacteriaceae | |||||||||||
| Additional Subjects | Biodeterioration ; Reaction kinetics ; Chlorine organic compounds ; Biomass ; Bacteria ; Mathematical models ; Molecular structure ; Solid waste disposal ; Toxic substances ; Biogas process | |||||||||||
| Holdings |
|
|||||||||||
| Collation | 32 pages : illustrations ; 28 cm | |||||||||||
| Abstract | A knowledge of the effect of toxic organic chemicals on the biotransformation characteristics of organic co-substrates is essential for predicting the impact of these chemicals in anaerobic processes. Bench-scale tests were conducted to assess the impact of toxic organic chemicals on the kinetics of acetoclastic methanogenesis and to determine the relationship between kinetic parameters obtained under non-toxic and toxic conditions. A computer model based on a finite difference non-linear least squares algorithm was used to calculate the kinetic parameters by obtaining a best-fit of the experimental data to the Michaelis-Menten substrate utilization model. Resulting kinetic coefficients revealed significant changes in both the maximum rate of acetate conversion, and the half-velocity coefficient, when using both chlorophenols and chloroanilines. Therefore, mixed inhibition was occurring. However, non-competitive mechanisms predominated with chemicals containing the 2-chloro functional group while competitive mechanisms seemed to predominate with the 3- and 4-chloro functional groups. |
|||||||||||
| Notes | "Henry H. Tabak, project officer." "Presented at the ACS Symposium on Chemical and Biochemical Detoxification of Hazardous Wastes II, Miami Beach, Florida on September 10-15, 1989." Includes bibliographical references. Microfiche. |
|||||||||||
| Contents Notes | EPA/600/D-90/137. |