Molecular microbial ecology of a naphthalene-degrading genotype in activated sludge
The concentration of cells in an activated sludge system containing a gene known to participate in degradation of naphthalene was experimentally related to the biotransformation and mineralization of naphthalene. The gene probe analysis for the naphthalene catabolic genotype was more sensitive in this system than other naphthalene degrader microbial analysis methods for naphthalene catabolic cells. Other live cells present were 1000-10,000-fold more numerous than the genotype. Naphthalene biotransformation and mineralization rates fell when the mean value of genotype replicates dropped below 10/sup 7/ genotypically positive cells/mL. The ability to enumerate a critical genotype and relate it to enzymatic activity in a mixed culture suggests an improved capability for system understanding at the ecological level and the potential for process control at the genotype level.
- Research Organization:
- Univ. of Tennessee, Knoxville
- OSTI ID:
- 5520332
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 21:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BACTERIA
GENOTYPE
NAPHTHALENE
BIODEGRADATION
MINERALIZATION
ACTIVATED SLUDGE PROCESS
MUNICIPAL WASTES
SEWAGE
SEWAGE SLUDGE
WASTE PROCESSING
AROMATICS
CHEMICAL REACTIONS
CONDENSED AROMATICS
DECOMPOSITION
HYDROCARBONS
MANAGEMENT
MICROORGANISMS
ORGANIC COMPOUNDS
PROCESSING
SLUDGES
WASTE MANAGEMENT
WASTES
550400* - Genetics
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)