JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status

Search the Journal web-site through Google:

        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), Bhubaneswar - 751 019, India

(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.

Key words: a-amylase, Cassava fibrous residue, Ethanol, Lactic acid, Solid substrate fermentation

Copyright 2008 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).