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Coffee husk: an inexpensive substrate for production of citric acid by Aspergillus niger in a solid-state fermentation system.

Shankaranand, V. S. and Lonsane, B. K. (1994) Coffee husk: an inexpensive substrate for production of citric acid by Aspergillus niger in a solid-state fermentation system. World Journal of Microbiology & Biotechnology, 10 (2). 165-168, 18 ref..

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Abstract

Aspergillus niger CFTRI 30 produced 1.3 g citric acid/10 g dry coffee husk in 72 h solid-state fermentation when the substrate was moistened with 0.075M NaOH solution. Production was increased by 17% by adding a mixture of iron, copper and zinc to the medium but enrichment of the moist solid medium with (NH4)2SO4, sucrose or any of 4 enzymes [2 cellulases, pectinase, amylase] did not improve production. Production of approx. 1.5 g citric acid/10 g dry coffee husk at a conversion of 82% (based on sugar consumed) under standardized conditions is concluded to demonstrate the commercial potential of using the husk in this way.

Item Type: Article
Uncontrolled Keywords: ACIDS-; ASPERGILLUS-; BEVERAGES-; BIOTECHNOLOGY-; CITRIC-ACID; COFFEE-; FERMENTATION-; FERMENTATION-PRODUCTS; FUNGI-; HUSKING-; PROCESSING-; WASTES-; HUSKS-; NIGER-
Subjects: 600 Technology > 05 Chemical engineering > 04 Fermentation Technology
600 Technology > 07 Beverage Technology > 04 Coffee
600 Technology > 08 Food technology > 16 Nutritive value > 07 Waste utilization
Divisions: Food Microbiology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 14 Mar 2018 08:56
Last Modified: 14 Mar 2018 08:56
URI: http://ir.cftri.com/id/eprint/3487

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