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pp.315-332
This study was conducted to assess the nutritional value and the safety of the fermented food wastes (FFW) made by adding lactobacillus spp. and bacillus spp. at the ratio of 3:7, respectively to food wastes collected everywhere, and also to determine effects on the performances, carcass characteristics and economical profitability when FFW was fed to pigs. For swine trial, FFW was formulated to pellet by utilizing different feed ingredients, and its formulated FFW pellet was used in this feeding trial. Treatments were consisted of different ratios (T1:100+0%, T2: 75+25%, T3: 50+50%, T4: 25+75%, T5: 0+100%) of FFW pellet to commercial diet. A total of 20 male pigs were allotted to treatments of five groups of four pigs per pen. Experimental period lasted for 4 months. The nutritional composition of FFW was 56.7, 19.5 and 19.5% for moisture, crude protein and ether extract, respectively. Salt content was 0.39%. Noxious microorganisms such as salmonella and E. coli were not detected in FFW, and contents of heavy metal and aflatoxin B1 were lower than the standard. Nutritional values of FFW pellet satisfied over 100% of requirements presented in official Korean feeding standard for swine. Feeding trial for pigs showed that feed intakes were significantly (P＜0.05) decreased with increasing levels of FFW pellet. T2 treatment was ideal ratio under the consideration of economical value of feeds and body weight gain of pigs. For carcass characteristics, dressing rate (%) was highest in T3, and carcass grades for T2, T3 and T4 treatments were estimated as “A”. Feed cost for FFW per kg was ￦167.95, which implies 52% of commercial feed cost (￦350/㎏). Thus, this result implied the decreased feed cost in the swine farm. Con-clusively, the utilization of food wastes as feed source may lead to the reduced environmental pollution and the practice of organic livestock farming. However, our results showed that excessive amount of fermented food wastes supplementation to pigs might give rise to their reduced palatability and delayed growth.
