Development of Resource-Saving Biotechnology for the Production of a Feed Additive from Distiller’s Wastes with Probiotic Properties

The trend towards an increase in ethanol production on a global scale and the tightening of restrictive measures regarding the disposal of by-products from production increases the relevance of research in finding ways to process them. This study aimed to assess the effectiveness of a feed additive containing dried stillage fermented with pre-immobilized cultures of Lactobacillus pontis ۶۷, Lb. casei ۲۲, Lb. paracasei ۱۰۴ when finishing steers. The dose of inoculum (۳.۰%) of a liquid probiotic drug based on the consortium Lb. pontis ۶۷, Lb. casei ۲۲, Lb. paracasei ۱۰۴ was determined, cultivation time ۲۴-۳۰ hours at a bacterial titer of ۱۰-۱۰ CFU/ml, and the characteristics of fermented stillage and a feed additive based on it were established. Studies were conducted to assess the effectiveness of finishing when using fermented wheat stillage on the qualitative characteristics of the carcass of ۱۳-month-old Kazakh white-headed steers on finishing. The studies were conducted in ۲ groups: control and experimental (۱۳% fermented stillage). The experimental group showed higher indicators of average daily gain (Р˂۰.۰۵), carcass weight, and slaughter yield (P˂۰.۰۵). According to the results of the conducted research, it can be concluded that the replacement of protein components of compound feed with stillage in an amount of ۱۰% and a probiotic drug based on the bacteria Lb. pontis ۶۷, Lb. casei ۲۲, Lb. paracasei ۱۰۴ in an amount of ۳.۰% contributes to an increase in weight gain when finishing steers by ۹.۱±۰.۳ kg, average daily gain by ۴۱۷±۲.۰ g, and slaughter yield by ۳.۱±۰.۲% compared with the control group (P˂۰.۰۵).

Keywords:

stillage , Feed additives , compound feed , Probiotic , feedlot steers