Effect of H/sub 2/-CO/sub 2/ on methanogenesis from acetate or methanol in Methanosarcina spp
Journal Article
·
· Appl. Environ. Microbiol.; (United States)
OSTI ID:5334441
Growth of Methanosarcina sp. strain 227 and Methanosarcina mazei on H/sub 2/-CO/sub 2/ and mixtures of H/sub 2/-CO/sub 2/ and acetate or methanol was examined. The growth yield of strain 227 on H/sub 2/-CO/sub 2/ in complex medium was 8.4 mg/mmol of methane produced. Growth in defined medium was characteristically slower, and cell yields were proportionately lower. Labeling studies confirmed that CO/sub 2/ was rapidly reduced to CH/sub 4/ in the presence of H/sub 2/, and little acetate was used for methanogenesis until H/sub 2/ was exhausted. This resulted in a biphasic pattern of growth similar to that reported for strain 227 grown on methanol-acetate mixtures. Biphasic growth was not observed in cultures on mixtures of H/sub 2/-CO/sub 2/ and methanol, and less methanol oxidation occurred in the presence of H/sub 2/. In M. mazei the aceticlastic reaction was also inhibited by the added H/sub 2/, but since the cultures did not immediately metabolize H/sub 2/, the duration of the inhibition was much longer.
- Research Organization:
- Div. of Environmental and Nutritional Sciences, School of Public Health, Univ. of California, Los Angeles, CA 90024
- OSTI ID:
- 5334441
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 46:2; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ACETATES
ALCOHOLS
ALKANES
ANAEROBIC DIGESTION
BACTERIA
BIOCONVERSION
BIOSYNTHESIS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACID SALTS
CHALCOGENIDES
DIGESTION
ELEMENTS
GROWTH
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
INHIBITION
MANAGEMENT
METHANE
METHANOGENIC BACTERIA
METHANOL
MICROORGANISMS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SYNTHESIS
WASTE MANAGEMENT
WASTE PROCESSING
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ACETATES
ALCOHOLS
ALKANES
ANAEROBIC DIGESTION
BACTERIA
BIOCONVERSION
BIOSYNTHESIS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACID SALTS
CHALCOGENIDES
DIGESTION
ELEMENTS
GROWTH
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
INHIBITION
MANAGEMENT
METHANE
METHANOGENIC BACTERIA
METHANOL
MICROORGANISMS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SYNTHESIS
WASTE MANAGEMENT
WASTE PROCESSING