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Conversion of cellulose to methane and carbon dioxide by triculture of acetivibrio cellulolyticus, desulfovibrio sp. , and methanosarcina barkeri

Journal Article · · Appl. Environ. Microbiol.; (United States)
OSTI ID:5193462
;
The fermentation of cellulose by monocultures of Acetivibrio cellulolyticus and cocultures of A. cellulolyticus-Methanosarcina barkeri, A. cellulolyticus-Desulfovibrio sp., and A. cellulolyticus-M. barkeri-Desulfovibrio sp. was studied. The monoculture produced ethanol, acetate, H, and CO. More acetate and less ethanol was formed by the cocultures than by the monoculture. Acetate was utilized by M. barkeri in coculture with A. cellulolyticus after a lag period, whereas ethanol was metabolized by the sulfate reducer only under conditions of low H partial pressure, i.e., when cocultured with A. cellulolyticus-M. barkeri or when grown together with the methanogen. Only the 3-component culture carried out the rapid conversion of cellulose to CO2 and CH4. Furthermore, this culture hydrolyzed the most cellulose-85% of that initially present. This amount was increased to 90% by increasing the population of M. barkeri in the triculture. CH4 production was also increased, and a quicker fermentation rate was achieved.
Research Organization:
Div. Biol. Sci., Natl. Res. Counc. Canada, Ottawa, ON Canada K1A 0R6
OSTI ID:
5193462
Journal Information:
Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 42:3; ISSN AEMID
Country of Publication:
United States
Language:
English

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59 BASIC BIOLOGICAL SCIENCES
ACETATES
ALCOHOLS
ALKANES
ANAEROBIC DIGESTION
BACTERIA
BIOCONVERSION
CARBOHYDRATES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBOXYLIC ACID SALTS
CELLULOSE
CHALCOGENIDES
DIGESTION
ELEMENTS
ETHANOL
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
MANAGEMENT
METHANE
MICROORGANISMS
MIXING
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYSACCHARIDES
PROCESSING
SACCHARIDES
WASTE MANAGEMENT
WASTE PROCESSING
YIELDS