Premium
Saccharification of Tapioca Starch Residue with a Multienzyme Preparation of Aspergillus ustus
Author(s) -
Shamala T. R.,
Sreekantiah K. R.
Publication year - 1986
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19860381208
Subject(s) - food science , bran , amylase , cellulase , starch , xylanase , hydrolysis , chemistry , fermentation , residue (chemistry) , reducing sugar , hydrolysate , sugar , biochemistry , enzyme , organic chemistry , raw material
Enzyme preparation obtained cultivating Aspergillus ustus on rice straw‐wheat bran mixture (7:3) possessed cellulase, D ‐xylanase, β‐ D ‐glucosidase, α‐amylase, amyloglucosidase and pectinase activities. Used at 2% level with tapioca starch residue (TSR) slurry gelatinized at 80°C or pressure cooked, it yielded 45–60% reducing sugar and degraded 52–65% of the fiber material. Enhanced saccharification (72%), fiber degradation (75%) could be achieved by pretreating the substrate with mineral acid. Fermentation of the hydrolysates with Saccharomyces cerevisiae produced 29–36 ml alcohol per 100 g of sun dried TSR. Data on TSR hydrolysis by α‐amylase and amyloglucosidase, A. ustus enzyme preparation individually and in combination with amyloglucosidase, in acid pretreated or untreated TSR are presented.