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Feed nutritional value of brewers’ spent grain residue resulting from protease aided protein removal

Journal of Animal Science and Biotechnology 2020年第1期11卷 147-156页

作者： Yizhao Shen ranithri abeynayake Xin Sun Tao Ran Jianguo Li Lingyun Chen Wenzhu Yang College of Animal Science and Technology Hebei Agricultural UniversityBaoding 071029HebeiRepublic of China Agriculture and Agri-Food of Canada Lethbridge Research and Development CentreLethbridgeAB AB T1J4B1Canada Department of Agricultural Food&Nutritional Science University of AlbertaEdmontonAB T6G 2P5Canada College of Food Science and Engineering Shandong Agricultural UniversityTaian 271000ShandongRepublic of China.

Background:This study was conducted to evaluate the feed nutritional value of brewers’spent grain(BSG)residue resulting from protease aided protein *** nutritional value was measured as nutrient content,gas production,nutrient digestibility and fermentation characteristics in batch ***:Protein extraction process decreased content of crude protein but concentrated the neutral detergent fibre(NDF)and ferulic acid in BSG *** changes in the chemical composition of BSG residue varied with enzyme and enzyme *** of dry matter(DMD)and NDF of residue differed among *** alcalase dosage linearly decreased DMD,whereas,the DMD linearly increased as everlase or flavourzyme dosage *** with BSG,the DMD,gas production and fermentation acid concentration of BSG residues were lower,whereas NDF digestibility was ***:The substantially increased NDF content and improved in vitro NDF digestibility due to protease hydrolysis suggest that BSG residue can be potentially exploited as a viable fibre source for ruminant feeding.

关键词： Batch culture Brewers’spent grain Chemical composition Fermentation Protease hydrolysis

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Effects of brewers' spent grain protein hydrolysates on gas production, ruminal fermentation characteristics, microbial protein synthesis and microbial community in an artificial rumen fed a high grain diet

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Journal of Animal Science and Biotechnology 2021年第1期12卷 314-327页

作者： Tao Ran Long Jin ranithri abeynayake Atef Mohamed Saleem Xiumin Zhang Dongyan Niu Lingyun Chen Wenzhu Yang Agriculture and Agri-Food of Canada Lethbridge Research and Development CentreLethbridgeAB T1J 4B1Canada Key Laboratory for Agro-Ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125HunanChina College of Veterinary Medicine University of Calgary2500 University Dr.NWCalgaryAB T2N 1N4Canada Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaEdmonton T6G 2P5Canada Department of Animal and Poultry Production Faculty of AgricultureSouth Valley UniversityQena 83523Egypt.

Background: Brewers' spent grain(BSG) typically contains 20% – 29% crude protein(CP) with high concentrations of glutamine, proline and hydrophobic and non-polar amino acid, making it an ideal material for producing valueadded products like bioactive peptides which have antioxidant properties. For this study, protein was extracted from BSG, hydrolyzed with 1% alcalase and flavourzyme, with the generated protein hydrolysates(AlcH and FlaH)showing antioxidant activities. This study evaluated the effects of AlcH and FlaH on gas production, ruminal fermentation characteristics, nutrient disappearance, microbial protein synthesis and microbial community using an artificial rumen system(RUSITEC) fed a high-grain ***: As compared to the control of grain only, supplementation of FlaH decreased(P < 0.01) disappearances of dry matter(DM), organic matter(OM), CP and starch, without affecting fibre disappearances;while AlcH had no effect on nutrient disappearance. Neither AlcH nor FlaH affected gas production or VFA profiles, however they increased(P < 0.01) NH_3-N and decreased(P < 0.01) H_2 production. Supplementation of FlaH decreased(P < 0.01)the percentage of CH_4 in total gas and dissolved-CH_4(dCH_4) in dissolved gas. Addition of monensin reduced(P < 0.01) disappearance of nutrients, improved fermentation efficiency and reduced CH_4 and H_2 *** microbial nitrogen production was decreased(P < 0.05) but the proportion of feed particle associated(FPA) bacteria was increased with FlaH and monensin supplementation. Numbers of OTUs and Shannon diversity indices of FPA microbial community were unaffected by AlcH and FlaH;whereas both indices were reduced(P < 0.05) by monensin. Taxonomic analysis revealed no effect of AlcH and FlaH on the relative abundance(RA) of bacteria at phylum level, whereas monensin reduced(P < 0.05) the RA of Firmicutes and Bacteroidetes and enhanced Proteobacteria. Supplementation of FlaH enhanced(P < 0.05) the RA of genus Prevotell

关键词： Antioxidant peptide Brewers'spent grain Fermentation Hydrogen production Methane production Protein hydrolysates RUSITEC

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