Direct fermentation of triticale starch to lactic acid by Rhizopus oryzae

Download
  1. (PDF, 464 KB)
  2. Get@NRC: Direct fermentation of triticale starch to lactic acid by Rhizopus oryzae (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1089/ind.2011.7.129
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleIndustrial Biotechnology
Volume7
Issue2
Pages129135; # of pages: 7
Subjectbiorefinery; Rhizopus oryzae; triticale; starch platform; lactic acid; calcium carbonatecid, calcium carbonate
AbstractThe production of lactic acid from triticale starch was demonstratedfor the first time. Direct fermentation by Rhizopus oryzae in batch modeled to a conversion yield of 0.74 g lactic acid/g starch. Kinetics analysisof the fermentation suggested a multiphase process which consistedof quick hydrolysis of starch, rapid glucose accumulation followedby fast production of lactic acid. In batch fermentation mode, correcttiming and proper dosage of a neutralizing agent (calcium carbonate)were found to be critical factors that affect the organic acid yield.Addition of CaCO3 at the time point when glucose accumulationhad reached its peak (24 h) resulted in the highest lactic acid yield.The best ratio (by weight) of triticale starch to CaCO3 for lactic acidproduction was 1:1. It was important to maintain a pH of about 5during the whole fermentation process. Fermentation carried out inan optimized, commercially available small-scale parallel bioreactor(DASGIP) yielded up to 0.87 g lactic acid/g triticale starch whenR. oryzae spores were directly added to the fermentation medium. Ourfermentation results indicated that triticale starch from this nonfoodcrop is a promising renewable feedstock for production of lactic acid
Publication date
LanguageEnglish
AffiliationNRC Biotechnology Research Institute; National Research Council Canada
Peer reviewedYes
NRC number53354
NPARC number17977076
Export citationExport as RIS
Report a correctionReport a correction
Record identifierbc39aac0-59d7-48de-8969-d33a0e2021b7
Record created2011-07-01
Record modified2017-03-23
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: