Avaliação química da silagem biológica de resíduos de pescado das indústrias de filetagem de tilápia do Nilo (Oreochromis niloticus)

Abstract

A third of the world's fishing is not used for direct consumption in food , goes to the preparation of feed or wasted aswaste. The ideal would be to use the raw material in its entire length and recover the byproducts , preventing the generation of waste. With the goals of increasing the income and production industry , and consequently minimize the environmental and health problems , from the fish waste , proceeded to the preparation of silage biological waste processing of the Nile tilapia (Oreocrhromis niloticus) after homogenization using waste fish , cabbage (Brassica oleracea) , papaya (Carica papaya) , for the preparation of yeast to maintain the pH around 4.0 . Analyses were conducted to determine the non-protein nitrogen , alpha- amino nitrogen , total volatile bases and thiobarbituric acid (TBA). The biological silage showed a gradual increase with time of storage of the silage, being accelerated at the beginning and became stable after 30 days of storage. With respect to total volatile bases a significant increase in the production of BVT is therefore indicative of further degradation of amino acids and proteins by microbial enzymes . The oxidative rancidity of the fat phase of silage biological Nile tilapia showed a substantial increase in TBA values up to 45.22 mg/100 g during the storage period.