Journal of Environmental Biology
pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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Abstract - Issue Jan 2008, 29 (1) Back
Solid substrate fermentation of cassava fibrous residue for production of a-amylase, lactic acid and ethanol
Ramesh C. Ray*, Sabita Mohapatra, Shrutirupa Panda and Shaktimay Kar
Central Tuber Crops
Research Institute (Regional Centre),
(Received: September 28, 2006 ; Revised received: December 18, 2006 ; Accepted: January 15, 2007)
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.
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