Acid hydrolysis of Jerusalem artichoke for ethanol fermentation

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260280124· OSTI ID:6199908

Kim, K; Hamdy, M K

An excellent substrate for ethanol production is the Jerusalem artichoke (JA) tuber (Helianthus tuberosus). This crop contains a high level of inulin that can be hydrolyzed mainly to D-fructose and has several distinct advantages as an energy source compared to others. The potential ethanol yield of ca. 4678 L/ha on good agricultural land is equivalent to that obtained from sugar beets and twice that of corn. When JA is to be used for ethanol fermentation by conventional yeast, it is first converted to fermentable sugars by enzymes or acids although various strains of yeast were used for the direct fermentation of JA extracts. Fleming and GrootWassink compared various acids (hydrochloric, sulfuric, citric, and phosphoric) and strong cation exchange resin for their effectiveness on inulin hydrolysis and reported that no differences were noted among the acids or resin in their influence on inulin hydrolysis. Undesirable side reactions were noted during acid hydrolysis leading to the formation of HMF and 2-(2-hydroxy acetyl) furan. The HMF at a level of 0.1% is known to inhibit growth and ethanol fermentation by yeast. In this study the authors established optimal conditions for complete acid-hydrolysis of JA with minimum side reactions and maximum sugar-ethanol production. A material balance for the ethanol production was also determined.

• Research Organization: Univ. of Georgia, Athens
• OSTI ID: 6199908
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 28:1; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ACID HYDROLYSIS
ALCOHOLS
BIOCONVERSION
BIOMASS
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
ETHANOL
FERMENTATION
FUNGI
HERBS
HYDROLYSIS
HYDROXY COMPOUNDS
INULIN
LYSIS
MICROORGANISMS
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
RENEWABLE ENERGY SOURCES
SACCHARIDES
SOLVOLYSIS
YEASTS
YIELDS