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Production of ethanol directly from potato starch by mixed culture of Saccharomyces cerevisiae and Aspergillus niger using electrochemical bioreactor.
J Microbiol Biotechnol. 2008 Mar; 18(3):545-51.JM

Abstract

When cultivated aerobically, Aspergillus niger hyphae produced extracellular glucoamylase, which catalyzes the saccharification of unliquified potato starch into glucose, but not when grown under anaerobic conditions. The Km and Vmax of the extracellular glucoamylase were 652.3 mg starch l-1 and 253.3 mg glucose l-1 min-1, respectively. In mixed culture of A. niger and Saccharomyces cerevisiae, oxygen had a negative influence on the alcohol fermentation of yeast, but activated fungal growth. Therefore, oxygen is a critical factor for ethanol production in the mixed culture, and its generation through electrolysis of water in an electrochemical bioreactor needs to be optimized for ethanol production from starch by coculture of fungal hyphae and yeast cells. By applying pulsed electric fields (PEF) into the electrochemical bioreactor, ethanol production from starch improved significantly: Ethanol produced from 50 g potato starch l-1 by a mixed culture of A. niger and S. cerevisiae was about 5 g l-1 in a conventional bioreactor, but was 9 g l-1 in 5 volts of PEF and about 19 g l-1 in 4 volts of PEF for 5 days.

Authors+Show Affiliations

Department of Biological Engineering, Seokyeong University, Seoul 136-704, Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18388475

Citation

Jeon, Bo Young, et al. "Production of Ethanol Directly From Potato Starch By Mixed Culture of Saccharomyces Cerevisiae and Aspergillus Niger Using Electrochemical Bioreactor." Journal of Microbiology and Biotechnology, vol. 18, no. 3, 2008, pp. 545-51.
Jeon BY, Kim DH, Na BK, et al. Production of ethanol directly from potato starch by mixed culture of Saccharomyces cerevisiae and Aspergillus niger using electrochemical bioreactor. J Microbiol Biotechnol. 2008;18(3):545-51.
Jeon, B. Y., Kim, D. H., Na, B. K., Ahn, D. H., & Park, D. H. (2008). Production of ethanol directly from potato starch by mixed culture of Saccharomyces cerevisiae and Aspergillus niger using electrochemical bioreactor. Journal of Microbiology and Biotechnology, 18(3), 545-51.
Jeon BY, et al. Production of Ethanol Directly From Potato Starch By Mixed Culture of Saccharomyces Cerevisiae and Aspergillus Niger Using Electrochemical Bioreactor. J Microbiol Biotechnol. 2008;18(3):545-51. PubMed PMID: 18388475.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Production of ethanol directly from potato starch by mixed culture of Saccharomyces cerevisiae and Aspergillus niger using electrochemical bioreactor. AU - Jeon,Bo Young, AU - Kim,Dae Hee, AU - Na,Byung Kwan, AU - Ahn,Dae Hee, AU - Park,Doo Hyun, PY - 2008/4/5/pubmed PY - 2008/7/11/medline PY - 2008/4/5/entrez SP - 545 EP - 51 JF - Journal of microbiology and biotechnology JO - J. Microbiol. Biotechnol. VL - 18 IS - 3 N2 - When cultivated aerobically, Aspergillus niger hyphae produced extracellular glucoamylase, which catalyzes the saccharification of unliquified potato starch into glucose, but not when grown under anaerobic conditions. The Km and Vmax of the extracellular glucoamylase were 652.3 mg starch l-1 and 253.3 mg glucose l-1 min-1, respectively. In mixed culture of A. niger and Saccharomyces cerevisiae, oxygen had a negative influence on the alcohol fermentation of yeast, but activated fungal growth. Therefore, oxygen is a critical factor for ethanol production in the mixed culture, and its generation through electrolysis of water in an electrochemical bioreactor needs to be optimized for ethanol production from starch by coculture of fungal hyphae and yeast cells. By applying pulsed electric fields (PEF) into the electrochemical bioreactor, ethanol production from starch improved significantly: Ethanol produced from 50 g potato starch l-1 by a mixed culture of A. niger and S. cerevisiae was about 5 g l-1 in a conventional bioreactor, but was 9 g l-1 in 5 volts of PEF and about 19 g l-1 in 4 volts of PEF for 5 days. SN - 1017-7825 UR - https://www.unboundmedicine.com/medline/citation/18388475/Production_of_ethanol_directly_from_potato_starch_by_mixed_culture_of_Saccharomyces_cerevisiae_and_Aspergillus_niger_using_electrochemical_bioreactor_ L2 - http://www.jmb.or.kr/journal/viewJournal.html?year=2008&vol=18&num=3&page=545 DB - PRIME DP - Unbound Medicine ER -