A biotechnological process for treatment and recycling poultry feathers as a feed ingredient

A strain of Kocuria rosea with keratinolytic capacity was cultured aerobically on submerged feathers to obtain a fermented feather meal (FFM). This FFM enriched with cells of K. rosea mainly contains crude protein (71%). The pepsin digestibility of the fermented product (88%) was similar to the valu...

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Bibliographic Details
Published in:Bioresource technology 2005-10, Vol.96 (15), p.1703-1708
Main Authors: Bertsch, A., Coello, N.
Format: Article
Language:English
Subjects:
amino acid composition
Amino Acids - metabolism
Animal Feed
Animals
Biological and medical sciences
Bioreactors
Biotechnology
Carotenoid pigment
carotenoids
Carotenoids - metabolism
chickens
Feather meal
Feathers
Feathers - metabolism
Feathers - microbiology
feed processing
feeds
Feedstock
Fermentation
Food industries
Fundamental and applied biological sciences. Psychology
histidine
keratin
Keratins - metabolism
Kocuria rosea
lysine
methionine
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
Micrococcaceae - metabolism
Poultry
protein value
proteolysis
Use and upgrading of agricultural and food by-products. Biotechnology
waste utilization
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Summary:A strain of Kocuria rosea with keratinolytic capacity was cultured aerobically on submerged feathers to obtain a fermented feather meal (FFM). This FFM enriched with cells of K. rosea mainly contains crude protein (71%). The pepsin digestibility of the fermented product (88%) was similar to the value of the commercial feather meal and more than 70% greater that untreated feathers. The bacterial biomass improved the content of amino acids lysine (3.46%), histidine (0.94%) and methionine (0.69%). Additionally, the amino acid availability tested by in vivo assay was greater than commercial feather meal. The microbial cells also supplied carotenoid pigments to FFM (68 ppm). These results suggest that feather meal enriched with K. rosea may be useful in animal feeding as protein and pigment source.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2004.12.026