Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Control of 'Geotrichum candidum' in Biological Waste Treatment.
Author Poo, Calvin P. C. ; Bhayan, Kiran H. ; Wan, Kuang K. ;
CORP Author Rhode Island Univ., Kingston.
Year Published 1971
Report Number DI-14-31-0001-3240; OWRR-A-033-RI; 03177,; A-033-RI(2)
Stock Number PB-205 774
Additional Subjects ( Microorganism control(Sewage) ; Metals) ; ( Sewage treatment ; Microorganism control(Sewage)) ; ( Fungi ; Microorganism control(Sewage)) ; Metabolism ; Nutrients ; Enzymes ; Bacteria ; Zinc ; Chromium ; Copper ; Nickel ; Silver ; Toxicology ; Temperature ; Chlorides ; Geotrichum candidum
Library Call Number Additional Info Location Last
NTIS  PB-205 774 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 33p
Enzyme inhibition of sewage microorganisms by heavy metals was studied. The degree of inhibition varied with metal and organism. The Michaelis-Mentan model was used to show that zinc, trivalent chromium, and copper were more toxic to sewage bacteria, whereas silver and nickel were more toxic to sewage fungus Geotrichum candidum. A competitive inhibition was detected for sewage bacteria, but the same metals showed a mixed non-competitive inhibition for Geotrichum candidum. The results imply that silver and nickel could make Geotrichum candidum more competitive in sewage than bacteria. Other conditions under which Geotrichum candidum can grow better than sewage bacteria include low temperature, high chloride content and the presence of asphalt photosensitization. (Author)