Effects of aromatic concentration on methane fermentation. Research report, July 1988-June 1990
The anaerobic biodegradability and toxicity of fourteen aromatic compounds were evaluated over a wide range of concentrations using a serum bottle technique. Benzene, toluene, and all three isomers of xylene were not significantly degraded to methane in a phenol-enriched culture. Complete degradation of 1000 mg/L phenol, 800 mg/L catechol, 100 mg/L 2-NP, 100 mg/L 3-NP, and 100 mg/L 4-NP was observed within two months while depletion of 100 mg/L resorcinol and 1000 mg/L hydroquinone required more than six and eight months incubation, respectively. None of the three isomers of chlorophenol were degraded in the phenol-enriched culture. Batch toxicity assay revealed that the phenol-enriched culture was more susceptible to inhibition caused by substituted phenols than the acetate-enriched culture. In general, the inhibitory effects on both phenol degradation and acetate utilization did not vary significantly with the isomer but rather with the substituted group. The degree of inhibition was in the order of nitrophenols chlorophenols hydroxyphenols. The Haldane inhibition model was used to fit experimental data from phenol and catechol. The inhibition of phenol degradation by chlorophenols, resorcinol, and hydroquineone was described rather well by a Monod-type noncompetitive model.
- Research Organization:
- Kentucky Water Resources Research Inst., Lexington, KY (USA)
- OSTI ID:
- 6364795
- Report Number(s):
- PB-91-107318/XAB; RR-174; CNN: DI-14-08-0001-G-1564
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BENZENE
ANAEROBIC DIGESTION
METHANE
BIOSYNTHESIS
NITROPHENOL
ORGANIC CHLORINE COMPOUNDS
PHENOL
PYROCATECHOL
QUINONES
RESORCINOL
TOLUENE
XYLENES
ACETATES
BENCH-SCALE EXPERIMENTS
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
INHIBITION
ISOMERS
MATHEMATICAL MODELS
PHENOLS
TIME DEPENDENCE
TOXICITY
WASTE WATER
WATER TREATMENT
ALKANES
ALKYLATED AROMATICS
AROMATICS
BIOCONVERSION
CARBOXYLIC ACID SALTS
DEVELOPERS
DIGESTION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
KINETICS
LIQUID WASTES
MANAGEMENT
NITRO COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
POLYPHENOLS
PROCESSING
REACTION KINETICS
SYNTHESIS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
090900* - Biomass Fuels- Processing- (1990-)