During the last ten years there has been increased consciousness of environment pollution. Dumping or burning wastes of agro-industrial by products present potential air and water pollution problems (Baucque and Fiems, 1988). Many by products have substantial potential value as animal feedstuffs and can replace cereals and green fodders. Consequently the competition between human and animal nutrition can be decreased.
Fruit and vegetable residues, which are generally discarded, can be recycled in to animal feeds. However these residues decay rapidly as a result of microbial growth. There is a dire need to develop methods to preserve these residues for a longer time so that they can be fed to livestock during lean season when green fodders are not available in sufficient quantities. Spoilage can be prevented by freezing, heat treatment, drying radiation or chemical treatment. Preservation of these residues materials by chemical treatment as well as sun drying could be less expensive and might require less investment than other methods available while maintaining the nutritive value (Lopez et al., 2000).