US EPA

1514422 

Journal Article 

Response of sOUR and AUR to heavy metal contamination in activated sludge. AU - MADONI P 

Davoli, D; Guglielmi, L 

1999 

1 

Water Research
ISSN: 0043-1354
EISSN: 1879-2448 

33 

10 

2459-2464 

eng 

BIOSIS COPYRIGHT: BIOL ABS. The aim of this work was to make a contribution to the knowledge of inhibition by heavy metals of both nitrifying and heterotrophic bacteria in the activated sludge, based on measurements of ammonium uptake rate (AUR) and oxygen uptake rate (sOUR) activities. For the inhibition tests, we used different concentrations of the following heavy metals: Cd2+, Cr6+, Cu2+, Pb2+ and Zn2+, and the toxic effect of each metal was measured after 1 and 24 h exposure. Tests were performed on activated sludgesheavy metals in comparison with heterotrophs.Inhibitory effects of Cr6+ and Zn2+, were quite similar on both AUR and sOUR activity. Our results suggest that in nitrifying activated sludge plants the sOUR test can be used better than AUR test to identify possible inhibitory effects of heavy metals from wastewater. 

BIOCHEMISTRY; BIOPHYSICS; ENVIRONMENTAL POLLUTANTS/POISONING; OCCUPATIONAL DISEASES; BACTERIA/CLASSIFICATION; SANITATION; AIR POLLUTION; SOIL POLLUTANTS; WATER POLLUTION; FERMENTATION; INDUSTRIAL MICROBIOLOGY; FOOD MICROBIOLOGY; BACTERIA; Biochemical Studies-General; Biophysics-General Biophysical Studies; Toxicology-Environmental and Industrial Toxicology; Bacteriology; Public Health: Environmental Health-Sewage Disposal and Sanitary Measures; Public Health: Environmental Health-Air; Food and Industrial Microbiology-General and Miscellaneous; Bacteria-General Unspecified (1992- ); 14280-50-3; 22537-48-0; 15158-11-9; 23713-49-7; 18540-29-9