Indian Journal of Microbiology
  • Year: 2005
  • Volume: 45
  • Issue: 3

Cassava starch factory waste as an alternative substrate for citric acid production by Aspergillus niger MTCC 282

  • Author:
  • V. R. Bindumole, K. Sasikiran, C. Balagopalan, B. Nambisan
  • Total Page Count: 5
  • Page Number: 235 to 239

Division of Crop Utilization and Biotechnology, Sreekariyam Thiruvananthapuram, Kerala 695 017, India

Central Tuber Crops Research Institute, Sreekariyam Thiruvananthapuram, Kerala 695 017, India

*Corresponding author; E-mail: balanambisan@yahoo.co.in; Tel: 91(471)2598551; Fax: 91(471)2590063

Abstract

Cassava starch factory waste (CSFW), is rich in organic matter, and can serve as raw material for the production of value added products. The possibility of utilizing CSFW for citric acid production by solid state fermentation using Aspergillus niger was investigated. Different cultural conditions such as incubation temperature, initial pH, fermentation time, inoculum size, nitrogen and phosphorus were optimised for maximum yield of citric acid. Addition of methanol enhanced citric acid production. Maximum yield of citric acid was 3.5g 100g−1 dry substrate. The starch conversion efficiency was 70%.

Keywords

Citric acid, solid state fermentation, Aspergillus niger, cassava waste