2001 Volume 72 Issue 10 Pages 542-550
The utilization of dehydrated office buffet garbage was studied as feedstuffs for pigs, The garbage, which was dehydrated by the hot air (130°C) drying method for about 10 hours, had higher contents of crude protein(CP), crude fat and crude ash than the basal diet. The digestibility of CP was 55% lower than general foodstuffs. The chemical composition, microbial population and physical characteristics as feeding basis were not largely changed after three months at normal temperature. However, an increase in peroxide value (16.9→36.5meq/kg) showed some extent of rancidity. Sixteen growing pigs with an average initial weight of 30kg were fattened up to about 110kg by ad libitum feeding and group feeding of four pigs each. Experimental groups were given a formula feed as a control and three treatment feeds which were mixed with 10%, 25% and 50% dehydrated garbage as CP substitute. In the treatment 50% group, feed intake and body weight were low, and the percentage of unsaturated fatty acids in backfat was significantly high. Between the control group and the treatment 10% and 25% groups, there was no difference in performance of feeding, fatty acid composition and odor of excreted feces. Therefore, the utilization of garbage dehydrated by the hot air drying method was possible as feedstuffs for pigs, and the maximum mixed rates appeared to be approximately 25% as a CP substitute (20% as feeding basis).
