Improved understanding and application of hazardous waste biological treatment processes using microbial systems analysis techniques
- Univ. of Tennessee, Knoxville (USA)
A systems analysis technique known as the frequency response method was used to characterize the system structure, and the stability and robustness of naphthalene biotransformation in an activated sludge-type system. The continuous system was perturbed with a complex wastewater feed stream containing a sinusoidally-varying naphthalene concentration while all other reactor operating parameters were held nearly constant. Time series offgas analysis for naphthalene provided a sensitive output parameter that was readily measured and related to the naphthalene reactor liquid concentration. The feed input perturbation period was varied in successive intervals from 64 to 1 hr, and intervening sequences of constant naphthalene feed concentration allowed the system to relax after each perturbation interval. Using an unsteady-state, difference equation-based naphthalene material balance with an assumed first-order naphthalene biotransformation rate equation, a first-order biotransformation rate parameter was calculated and was used as an indicator for interpretation of the unexpectedly complex, dynamic naphthalene biotransformation activity. Frequency response analysis of mixed microbial systems was found to be a feasible and useful tool with which to probe the dynamic behavior of biotransformation activity in an operating biological treatment system.
- OSTI ID:
- 5872228
- Journal Information:
- Hazardous Waste and Hazardous Materials; (USA), Vol. 6:2; ISSN 0882-5696
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
NAPHTHALENE
BIODEGRADATION
WASTE WATER
DECONTAMINATION
MICROORGANISMS
TIME-SERIES ANALYSIS
WATER POLLUTION
AROMATICS
CHEMICAL REACTIONS
CLEANING
CONDENSED AROMATICS
DECOMPOSITION
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MATHEMATICS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology