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2013, vol. 40, br. 2, str. 77-83
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Povećanje sadržaja proteina suncokretove sačme postupkom vazdušne klasifikacije
Protein enrichment of sunflower meal by air classification
Projekat: Istraživanje savremenih biotehnoloških postupaka u proizvodnji hrane za životinje u cilju povećanja konkurentnosti, kvaliteta i bezbednosti hrane (MPNTR - 46012)
Sažetak
Suncokretova sačma predstavlja sporedni proizvod koji zaostaje u velikim količinama nakon ekstrakcije ulja iz suncokreta. Najviše se koristi u proizvodnji hrane za životinje kao izvor proteina. Sadržaj proteina je stoga bitan parametar kvaliteta suncokretove sačme. Uklanjanjem ljuske suncokreta, smanjuje se sadržaj sirovih vlakana, povećava se sadržaj proteina, a time i nutritivna vrednost suncokretove sačme. Cilj rada bio je da se proceni postupak vazdušne klasifikacije u svrhu dobijanja visokoproteinskih frakcija suncokretove sačme mlevene na konusnom mlinu. Konusni mlin je korišćen za usitnjavanje čestica i grudvi suncokretove sačme. Tokom vazdušne klasifikacije, varirani su protok vazduha i brzina doziranja. Pri svakom korišćenom protoku vazduha dobijene su frakcije sa značajno višim (p<0.05) sadržajem sirovih proteina od početne suncokretove sačme. Povećanje protoka vazduha rezultovalo je manjim prinosom težih frakcija, koje su imale viši sadržaj proteina.
Abstract
Sunflower meal is a by-product that remains after oil extraction from sunflower seeds. It is produced in large quantities and it is mostly used as protein source in animal feed production. Thus, protein content is an important quality parameter of sunflower meal. Removal of sunflower hull decreases the crude fiber content, increases the crude protein content and nutritional value of sunflower meal. The aim of this study was to evaluate the process of air classification for obtaining protein enriched fractions of sunflower meal. The conical mill was used to reduce the size of particles and agglomerates of sunflower meal. Air flow and feeding rate were varied during air classification process. At each air flow setting protein enriched fractions that had significantly higher (p<0.05) crude protein content than the unclassified sunflower meal were obtained. Increase of air flow resulted in coarse fractions with higher protein content and lower yield.
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