Abstract
Certain cost-effective carbohydrate sources in crude as well as after purification were utilized as the sole sources of carbon for gluconic acid production using Aspergillus niger ORS-4.410 under submerged fermentation. Crude grape must (GM) and banana-must (BM) resulted into significant levels of gluconic acid production i.e. 62.6 and 54.6 g/l, respectively. The purification of grape and banana-must led to a 20-21% increase in gluconic acid yield. Molasses as such did not favour gluconate production (12.0 g/l) but a significant increase in production (60.3 g/l) was observed following hexacyanoferrate (HCF) treatment of the molasses. Rectified grape must (RGM) appeared to be best suitable substrate which after 144 h resulted in 73.2 g of gluconic acid/l with 80.6% yield followed by the yield obtained from the rectified banana must (RBM) (72.4%) and treated cane molasses (TM) (61.3%). Abundant growth of mould A. niger ORS-4.410 was observed with crude grape (0.131 g/l/h) and banana must (0.132 g/l/h).
Original language | English (US) |
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Pages (from-to) | 519-524 |
Number of pages | 6 |
Journal | World Journal of Microbiology and Biotechnology |
Volume | 21 |
Issue number | 4 |
DOIs | |
State | Published - Jun 2005 |
Keywords
- Aspergillus niger
- Banana-must
- Batch fermentation
- Gluconic acid
- Grape-must
- Molasses
ASJC Scopus subject areas
- Biotechnology
- Physiology
- Applied Microbiology and Biotechnology