Influence of the composition of sunflower meal on the efficiency of separating the protein part of the raw material from fiber by mechanical fractionation
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The purpose of this article is to study the effectiveness of mechanical fractionation of sunflower meal. The objectsof the study were two samples of sunflower meal of Russian production, by various manufacturers, and with different content of raw protein. Mechanical fractionation included the stages of grinding raw materials and its sifting using a set of sieves. The effectiveness of mechanical fractionation is determined by the mass yields of the fractions and the content of raw protein in the fractions as well as the ratio of the content of raw protein to the content of raw fiber. Based on this definition of effectiveness, the mass yields and the physicochemical composition of the obtained fractions were determined for each of the samples. The quality parameters of the fractions were selected by the content of raw protein and the content of raw fiber. Despite the different content of raw protein in the raw materials (35% in the first sample and 39% in the second sample), the content of raw protein in the high-protein fraction of both samples was similar and amounted to 42% and 43%, respectively. The fiber content in high-protein fractions of the two samples also differed slightly and amounted to 14% in the first sample and 12% in the second sample. At the same time, a noticeable difference in the mass yields of the fractions in two samples was discovered. The output of the high-protein fraction in the first sample (71%) significantly exceeded the output of the high-protein fraction in the second sample (27%). Thus, mechanical fractionation of the first sample was more effective due to the greater yield of the high-protein fraction.
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