Effects of chromate and cadmium on most probable number estimates of nitrifying bacteria in activated sludge
Recent concern over pollution of the environment with heavy metals extends to natural waterways and water treatment systems. Extensive use of heavy metals by industry has resulted in the presence of significant concentrations of these potential intoxicants in sewage treatment influents, effluents and receiving water resources (NYTELKA et al., 1973). Evaluation of the effects of such metals on natural and artificial water systems should include the study of biological phenomena such as nitrification. This study was an effort to determine the effects of chromate and cadmium on the number of nitrifying bacteria obtained from activated sludge samples. Most probable number (MPN) estimates of these bacteria were made in media containing several concentrations of K/sub 2/CrO/sub 4/ and CdCl/sub 2/.
- Research Organization:
- California State Univ., Los Angeles
- OSTI ID:
- 5040512
- Journal Information:
- Bull. Environ. Contam. Toxicol.; (United States), Vol. 18:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
METALS
ENVIRONMENTAL EFFECTS
NITROGEN FIXATION
ACTIVATED SLUDGE PROCESS
BACTERIA
BIOLOGICAL EFFECTS
CADMIUM
CADMIUM CHLORIDES
CHROMATES
ECOLOGICAL CONCENTRATION
LIQUID WASTES
POTASSIUM COMPOUNDS
SEWAGE SLUDGE
TRACE AMOUNTS
WATER POLLUTION
WATER TREATMENT
ALKALI METAL COMPOUNDS
CADMIUM COMPOUNDS
CADMIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MICROORGANISMS
OXYGEN COMPOUNDS
POLLUTION
PROCESSING
SEWAGE
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)