Acidogenic fermentation of corn stover
Corn stover was fermentd by anaerobic acidogenic bacteria to produce volatile (C2-C6) organic acids. Mild pretreatment with dilute alkali solutions produced a two-fold increase in fermentability. A mixture of lime and sodium carbonate was found to be a better pretreatment agent than sodium hydroxide. Methane generation was inhibited by low temperature less than or equal to 25 degrees Celcius and high solids greater than or equal to 2.5% (w/v) fermentation. Volatile acid yields of 0.5-0.55 g acetic acid equivalent/g dry ash-free (DAF) stover could be obtained in batch fermentations. Several extractants and extraction solvents for organic acids were found to be nontoxic to acidogenic fermentation. The data show that acidogenic fermentation can produce useful volatile fatty acids in high yields from a complex lignocellulosic feedstock. These fermentation are nonsterile, need no stirring, and are easy to run. Moreover, cellulose, pentosans, and other carbohydrates are directly utilized by acidogenic bacteria. Hence, acidogenic fermentation could be useful in converting biomass to chemical feedstocks and fuel.
- Research Organization:
- Exxon Research and Engineering Co, PO Box 45, Linden, New Jersey
- OSTI ID:
- 6742310
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 23:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AGRICULTURAL WASTES
ANAEROBIC DIGESTION
METHANE
BIOSYNTHESIS
ORGANIC ACIDS
BATCH CULTURE
BIOMASS
CARBOXYLIC ACIDS
CHEMICAL FEEDSTOCKS
CLOSTRIDIUM THERMOCELLUM
FERMENTATION
FUELS
MAIZE
ALKANES
BACTERIA
BIOCONVERSION
CEREALS
CLOSTRIDIUM
DIGESTION
ENERGY SOURCES
GRAMINEAE
GRASS
HYDROCARBONS
MANAGEMENT
MICROORGANISMS
ORGANIC COMPOUNDS
ORGANIC WASTES
PLANTS
PROCESSING
RENEWABLE ENERGY SOURCES
SYNTHESIS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)