Abstract: 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.
a-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 a-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 (a-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.
Key words: a-amylase, Cassava fibrous residue, Ethanol, Lactic acid, Solid substrate fermentation
PDF of full length paper is available with author (*rc.ray6@gmail.com)