Technologies for processing fat waste and technical fish oils

Abstract

Current economic and environmental conditions require a more rational approach to use of industrial waste. It is necessary not only to clean industrial effluents from pollution, but also to find rational ways of using pollutants extracted from the industrial effluents. This is especially relevant for fatty foam masses, which are formed during flotation treatment of the fat production runoff. The issue of their rational use has not been resolved yet. Traditionally, these products are buried at specialized landfills. Also, the question of using soap water flows, which are formed during refining the semi-finished fish oils with a solution of alkali, remains. Usually soap water flows are not used and are sent to the combined stock of fat production. An equally urgent problem of the fishing industry is the processing of semi-finished technical fish oils with a high acid number (over 20 mg KOH / g). Traditional cleaning of such semi-finished products is unprofitable. It requires a significant expenditure of material resources. In this case, the yield of purified fish oil is not more than 60 %. At the same time, the listed objects contain a significant amount of polyunsaturated fatty acids. Therefore, after additional processing, they should be considered as a secondary material resource for obtaining surface-active, film-forming, and anti-friction substances.