Quality of acid silage from tilapia (Oreochromis niloticus) filleting waste during storage

The fish acid silage is an age old organic matter preservation technique, elaborated starting from whole fish or their parts, to which acids are added. The objective of this research was to produce and characterize acid silage from tilapia filleting residues elaborated with organic acids during 28 days of storage. For such, three acid silage types were elaborated from residues of tilapia filleting using 5% v/p of formic, acetic and propionic organic acids. The moisture and ethereal extract variables increased in relation to the initial ensilage time. In compensation, the protein and ash content underwent a decrease. The extracted oils of the silage remained stable during the experiment, peroxide formation not being detected. Due to the high preservation efficiency, the three acids (formic, acetic and propionic) are suitable in the elaboration of fish acid silage.