Physicochemical characterization of two agricultural wastes for the formulation of animal feeds

Abstract

Waste management is a major problem to which the agricultural and food industries must find solutions. The latter use pineapple in most of the processes for the manufacture of fruit juices. These processes result in tons of waste that are often abandoned on dumps near the processing plants, polluting the water table and the quality of surface water after drainage by rainwater. Our study therefore proposed to find an efficient solution to this problem by valorizing agro-industrial pineapple waste in animal feed. Thus, the physicochemical parameters of pineapple peelings and soybean cakes were determined following protocols of French standards. From the results obtained, it appears that pineapple peelings are rich in fermentable sugars, especially cellulose, a source of energy (34% DM) but poor in total nitrogenous matter (6.86%). As feed is a source of protein, soybean meal was added to pineapple peels for enrichment in total nitrogenous matter. The characterized soybean meal showed that it contains 33.46% of total nitrogenous matter. A more complete characterization of the formulated feeds will have to be carried out for their better use in animal feed.