Lactic acid production from cassava fibrous residue using Lactobacillus plantarum MTCC 1407.
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 35 degrees C 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%.
Regional Centre of Central Tuber Crops Research Institute, Bhubaneswar 751 019, India. rc_ray@rediffmail.com
Ramesh Chandra
RC
Ray
Piyush
P
Sharma
Smita Hasini
SH
Panda
D002119:Calcium Carbonate / Q000737:chemistry; D018929:Cell Culture Techniques; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000378:metabolism*; D048191:Lactiplantibacillus plantarum / Q000378:metabolism*; D002365:Manihot / Q000737:chemistry*; D008954:Models, Biological; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D013997:Time Factors
D013501:Surface-Active Agents; D019344:Lactic Acid; D002119:Calcium Carbonate