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 67, lb. casei 22, lb. paracasei 104 when finishing steers. the dose of inoculum (3.0%) of a liquid probiotic drug based on the consortium lb. pontis 67, lb. casei 22, lb. paracasei 104 was determined, cultivation time 24-30 hours at a bacterial titer of 10-10 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 13-month-old kazakh white-headed steers on finishing. the studies were conducted in 2 groups: control and experimental (13% fermented stillage). the experimental group showed higher indicators of average daily gain (р˂0.05), carcass weight, and slaughter yield (p˂0.05). 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 10% and a probiotic drug based on the bacteria lb. pontis 67, lb. casei 22, lb. paracasei 104 in an amount of 3.0% contributes to an increase in weight gain when finishing steers by 9.1±0.3 kg, average daily gain by 417±2.0 g, and slaughter yield by 3.1±0.2% compared with the control group (p˂0.05).