Mechanism of inhibition caused by long-chain fatty acids in anaerobic digestion process

Journal Article · Wed Jul 01 04:00:00 EDT 1981 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260230717· OSTI ID:5207232

Hanaki, K; Matsuo, T; Nagase, M

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 inhibtion. 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. 18 refs.

• Research Organization: Tohoku Univ, Sendai, Japan
• OSTI ID: 5207232
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 23:7; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
550200 -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ALDEHYDES
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOSYNTHESIS
CALCIUM CARBONATES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBOHYDRATES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHLORIDES
CHLORINE COMPOUNDS
DIGESTION
ELEMENTS
GLUCOSE
HALIDES
HALOGEN COMPOUNDS
HEXOSES
HYDROCARBONS
HYDROGEN
INHIBITION
MANAGEMENT
METHANE
MONOSACCHARIDES
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
SACCHARIDES
SLUDGES
SYNTHESIS
WASTE MANAGEMENT
WASTE PROCESSING