Solid substrate fermentation of cassava fibrous residue for production of alpha-amylase, lactic acid and ethanol.
There is serious concern about the disposal of solid residues left after large scale extraction of starch from cassava. Owing to the high starch content (55-65% on dry weight basis) and organic matter of these wastes, an attempt has been made to utilize it for the production of three bioproducts, i.e. alpha-amylase, lactic acid and ethanol in solid substrate fermentation by incubating the solid residue at different moisture holding capacity (40-80%) and incubation period (12- 60 hr for alpha-amylase, 24-144 hr for ethanol and 2-10 days for lactic acid). The highest product yield was obtained at 60% moisture holding capacity of the residue and period of incubation varied from 36 hr (alpha-amylase), 120 hr (ethanol) to 6 days (lactic acid). This study showed that the solid residues from cassava starch factories could serve as a low-cost substrate for bioproducts production.
Ray
Ramesh C
RC
Central Tuber Crops Research Institute (Regional Centre), Bhubaneswar 751 019, India. rc.ray6@gmail.com
Mohapatra
Sabita
S
Panda
Shrutirupa
S
Kar
Shaktimay
S
D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D007221:Industry; D019344:Lactic Acid / Q000096:biosynthesis*; D002365:Manihot / Q000737:chemistry* / Q000378:metabolism*; D013213:Starch / Q000378:metabolism*; D013997:Time Factors; D000516:alpha-Amylases / Q000096:biosynthesis*
D019344:Lactic Acid; D000431:Ethanol; D013213:Starch; D000516:alpha-Amylases