Anaerobic biodegradation of phenolic compounds in digested sludge
The authors examined the anaerobic degradation of phenol and the ortho, meta, and para isomers of chlorophenol, methoxyphenol, methylphenol (cresol),and nitrophenol in anaerobic sewage sludge diluted to 10% in a mineral salts medium. Of the 12 monosubstituted phenols studied, only p-chlorophenol and o-cresol were not significantly degraded during an 8-week incubation period. The phenol compounds degraded and the time required for complete substrate disappearance (in weeks) were: phenol (2), o-chlorophenol (3), m-chlorophenol (7), o-methoxyphenol (2), m- and p-methoxyphenol (1), m-cresol (7), p-cresol (3), and o-, m-, and p-nitrophenol (1). Complete mineralization of phenol, o-chlorophenol, m-cresol, p-cresol, o-nitrophenol, p-nitrophenol, and o-, m-, and p-methoxyphenol was observed. In general, the presence of Cl and NO/sub 2/ groups on phenols inhibited methane production. Elimination or transformation of these substituents was accompanied by increased methane production. o-Chlorophenol was metabolized to phenol, which indicated that dechlorination was the initial degradation step. The methoxyphenols were transformed to the corresponding dihydroxybenzene compounds, which were subsequently mineralized. (Refs. 14).
- Research Organization:
- Dept. of Crop and Soil Sciences, Michigan State Univ., East Lansing, MI 48824
- OSTI ID:
- 5164267
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Vol. 46:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
PHENOLS
BIODEGRADATION
SEWAGE SLUDGE
ANAEROBIC DIGESTION
GAS YIELDS
INHIBITION
METHANE
PRODUCTION
ALKANES
AROMATICS
BIOCONVERSION
CHEMICAL REACTIONS
DECOMPOSITION
DIGESTION
HYDROCARBONS
HYDROXY COMPOUNDS
MANAGEMENT
ORGANIC COMPOUNDS
PROCESSING
SEWAGE
SLUDGES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YIELDS
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)