Technological Conditiongs Optimization of Protein Feed Production from Polygonum Residues by Solid State Fermentation
To optimize the process conditions for the production of protein feed by solid-state fermentation with Polygonati rhizoma residue as raw material.The single factor test and response surface test were used to optimize the process conditions for the preparation of protein feed by mixed bacteria and compound enzyme fermentation.The optimal process conditions were as follows:solid-liquid ratio 0.55 g/mL,fermenta-tion pH value 4.5,cellulase addition 0.26%,xylanase addition 0.05%,Candida utilis addition 9.89%,Pha-nerochaete chrysosporium addition 7.50%,fermentation temperature 37℃.Under the optimal process condi-tions,the crude protein content of Polygonum residue was 19.79%,and the rude fiber content of Polygonum residue was 3.87%,with an increase of 9.17%in crude protein content and a decrease of 3.08%in crude fiber content.The solid-state fermentation of Polygonatum sibiricum residue by mixed bacteria and com-pound enzyme can increase the content of crude protein and reduce the content of crude fiber,which pro-vides a new direction for the preparation of protein feed.
Polygonum residuesmixed bacteriacomposite enzymesolid state fermentationprotein feedprocess optimization
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