Development of extruded animal feed based on fat and oil industry waste

Abstract

The paper considers the way to solve the problem of processing waste from the oil and fat industry, namely sunflower and soybean meals, which are a source of many valuable substances. The peculiarity of the work lies in determining the rational ratio of the base components of extruded animal feed, which is an important aspect of obtaining high-quality competitive products. The research object is the use of oil and fat industry waste in extruded animal feed technology. The rational ratio of the components of extruded animal feed has been determined. The rational ratio of animal feed components is: sunflower meal – 0.40 parts by weight; soybean meal – 0.25 parts by weight; oatmeal – 0.35 parts by weight. The animal feed sample with justified composition corresponds to the commercial analogue in terms of porosity (72 % and 76 %, respectively) and cost ($285/t and $285/t, respectively). In addition, the extruded feed with the developed composition exceeds the commercial analogue in terms of protein content by 3.2 times and essential amino acids content by 2.9 times. The obtained data are explained by the use of a complex of components, namely oil and fat waste and starch-containing grain raw materials with various limiting amino acids and various technological features of the extruded mass of their mixture. The feature of the obtained results is the possibility to control the technological characteristic (porosity) of the finished product depending on the components ratio, which allows changing product characteristics according to consumer requirements. The research results make it possible to efficiently process secondary products of oilseed processing into a new competitive marketable product. From a practical point of view, the technology makes it possible to reduce the cost of storage/utilization of industry waste, get additional income from new products sales and improve environmental conditions. The applied aspect of using the scientific result is the possibility to create a range of animal feed with different technological indicators depending on the components ratio.