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Microbial biomass protein and polysaccharide production from vegetable processing wastes
Author(s) -
Jwanny Etidal W.,
Rashad Mona M.,
Moharib Sorial A.
Publication year - 1989
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620290905
Subject(s) - hydrolysate , xylose , fermentation , food science , sugar , polysaccharide , yeast , laboratory flask , biomass (ecology) , arabinose , chemistry , yeast extract , galactose , biology , botany , biochemistry , agronomy , hydrolysis
Pichia pinus was grown in flasks on extract of mango peel medium. The yield was about 2.5 g of dry yeast cells per liter. The reducing sugar concentration of the medium decreased during the fermentation from a level of about 1.5 to 0.7 gl −1 after 4 days of growth. The value of biomass production after 48 h fermentation was 3 g/g of reducing sugar in the extract of mango peel. The yeast cells contained 66.5 % crude protein. Reasonable amounts of essential amino acids could be estimated. Extracellular polysaccharides formed during fermentation were estimated. The maximum amount found was about 4.8‐5 gl −1 on the 4th day of growth. Chromatographic analysis of the purified polysaccharide hydrolysates revealed the presence of glucose, galactose, arabinose, xylose and an unknown spot near the starting point. The sugar components of exopolysaccharides hydrolysate differed during growing time.