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Title: Production of protein rich organic fertilizer from fish scale by a mutant Aspergillus niger AB100__ A media optimization study
Authors: Basu, Barnali
Banik, Ajit K
Keywords: Protein rich organic fertilizer
Fish scale
Aspergillus niger AB100
Issue Date: Apr-2005
Publisher: CSIR
IPC CodeC 05 F 3/00
Abstract:  Fish scale, the chief waste material of fish processing industries, was enzymatically hydrolyzed by protease of Aspergillus niger AB100 to produce soluble protein for use as organic fertilizer. Optimum inorganic nutrients were found to be: MgSO4, 0.75; K2HPO4, 0.2; and KCl, 0.075%. A. niger AB100 required FeSO4.7H2O (5 μg/ml) and ZnSO4.7H2O (15 μg/ml) for higher amount of protease production and yield. The optimum values for the tested cost-effective nutrients for the maximum protease production were: Defatted soybean-meal, 0.2; Peptone, 0.3; and Corn-steep-liquor, 0.2%. Biomass growth was not related proportionately in every case with that of enzyme production and protein solubilisation but protease production shows a positive correlation with hydrolysis of scale to produce soluble protein.
Page(s): 293-298
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.64(04) [April 2005]

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