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Continuous Ethanol Production from Concentrated Wood Hydrolysates in an Internal Membrane‐Filtration Bioreactor
Author(s) -
Lee Woo Gi,
Park Byung Geon,
Chang Yong Keun,
Chang Ho Nam,
Lee Jin Suk,
Park Soon Chul
Publication year - 2000
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp990130f
Subject(s) - hydrolysate , bioreactor , sterilization (economics) , chemistry , chromatography , filtration (mathematics) , ethanol , membrane bioreactor , membrane , ethanol fuel , pulp and paper industry , food science , biochemistry , hydrolysis , organic chemistry , statistics , mathematics , monetary economics , economics , foreign exchange market , engineering , foreign exchange
Continuous culture for the production of ethanol from wood hydrolysate was carried out in an internal membrane‐filtration bioreactor. The hydrolysate medium was sterilized at a relatively low temperature of 60 °C with the intention of reducing the formation of inhibitory compounds during the sterilization. The maximum ethanol concentration and productivity obtained in this study were 76.9 g/L and 16.9 g/L‐h, respectively, which were much higher than those (57.2–67 g/L and 0.3–1.0 g/L‐h) obtained in batch cultures using hydrolysate media sterilized at 60 °C. The productivity was also found to be much higher than that (6.7 g/L‐h) obtained in a continuous cell retention culture using a wood hydrolysate sterilized at 121 °C. These results show that the internal membrane‐filtration bioreactor in combination with low‐temperature sterilization could be very effective for ethanol production from wood hydrolysate.