Journal of Environmental Biology

Lactic acid production from cassava fibrous residue using

Lactobacillus plantarum MTCC 1407

 

Ramesh Chandra Ray*, Piyush Sharma and Smita Hasini Panda

Regional Centre of Central Tuber Crops Research Institute, Bhubaneswar - 751 019,? India

(Received: October 25, 2008; Revised received: July 09, 2008; Accepted: July 29, 2008)

 

Abstract: During extraction of starch from cassava, fibrous residue is a major waste released into the environment. Owing to the high starch content (60- 65% on dry weight basis) and organic matter of cassava fibrous residue (CFR), an attempt has been made to utilize it for the production of lactic acid (LA) in semi- solid state fermentation using Mann Rogassa Sharpe medium containing [5 % (wv^-1)] CFR in lieu of glucose [2 % (wv^-1)] as the carbon source. Response Surface Methodology (RSM) was used to evaluate the effect of main variables, i.e. incubation period, temperature and pH on LA production. The experimental results showed that the optimum incubation period, temperature and pH were 120 hr, 35⁰C and 6.5, respectively. Maximum starch conversion by Lactobacillus plantarum MTCC 1407 to LA was 63.3%. The organism produced 29.86 g of (L+) LA from 60 g of starch present in 100? g of CFR. The LA production yield (i.e. mass LA produced mass starch present in CFR^-1 x 100) was 49.76 %.

Key words: Cassava fibrous residue, Lactobacillus plantarum MTCC 1407,? Lactic acid, Response

surface methodology, Semi- solid fermentation

Copyright ? 2009 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).