Mechanism of inhibition caused by long-chain fatty acids in anaerobic digestion process
The inhibitory effect of long-chain fatty acids on the anaerobic digestion process was examined in batch experiments using synthetic substrates. The addition of long-chain fatty acids caused the appearance of the lag period in the methane production from acetate and in the degradation of both long-chain fatty acids and n-butyrate. Methane production from hydrogen proceeded without lag period although its rate was lowered. Fermentation of glucose was not inhibited. Neutral fat in the whole milk was easily hydrolyzed to long-chain fatty acids, which brought about the inhibition. The addition of calcium chloride reduced the inhibitory effect of long-chain fatty acids, but it did not do so after the culture had been exposed to long-chain fatty acids for more than several hours. The addition of calcium carbonate could not reduce the inhibition because of its insolubility. (Refs. 18).
- Research Organization:
- Dept. of Civil Engineering, Tohoku Univ., Aoba, Sendai 980, Japan; Dept. of Urban Engineering, The Univ. of Tokyo, Hongo, Tokyo 113, Japan
- OSTI ID:
- 5095824
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 23:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANAEROBIC DIGESTION
INHIBITION
METHANE
PRODUCTION
ACETATES
CALCIUM CARBONATES
CARBOXYLIC ACIDS
FERMENTATION
GLUCOSE
HYDROGEN
SUBSTRATES
ALDEHYDES
ALKALINE EARTH METAL COMPOUNDS
ALKANES
BIOCONVERSION
CALCIUM COMPOUNDS
CARBOHYDRATES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACID SALTS
DIGESTION
ELEMENTS
HEXOSES
HYDROCARBONS
MANAGEMENT
MONOSACCHARIDES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
SACCHARIDES
WASTE MANAGEMENT
WASTE PROCESSING
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)