Feather wastes digestion by new isolated strains Bacillus sp. in Morocco | Zendy

Ilham Zerdani | Zendy; Faid Mohamed | Zendy; Malki Abderahim | Zendy

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Feather wastes digestion by new isolated strains Bacillus sp. in Morocco

Author(s) -

Ilham Zerdani,

Faid Mohamed,

Malki Abderahim

Publication year - 2004

Publication title -

african journal of biotechnology

Language(s) - English

Resource type - Journals

ISSN - 1684-5315

DOI - 10.5897/ajb2004.000-2012

Subject(s) - feather , bacillus subtilis , strain (injury) , digestion (alchemy) , food science , keratinase , feather meal , bacillus (shape) , hydrolysis , biology , fermentation , incubation , chemistry , microbiology and biotechnology , bacteria , chromatography , biochemistry , fish meal , ecology , genetics , anatomy , fishery , fish <actinopterygii>

Eight strains of Bacillus were isolated from non treated soil, characterized and used for the digestion of feather wastes in the laboratory. Non-protein nitrogen (NPN) and total protein (TP) were determined during the incubation time and the microbial counts of the different strains during feather hydrolysis were also monitored. Results of the screening test showed that the solid pieces of feather were completely digested by all the strains. The most efficient isolated strain selected was compared with Bacillus subtilis ATCC 6633. Results showed that the total protein decreased from 13.6% to 1.92 % with the isolated strain, and from 12.25 % to 2.99% with the standard strain. The NPN reached a concentration of 43.2mg/100g and 20.5 mg/100g with the isolated and standard strains, respectively.

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