Abstract
Recycling and using food waste (FW) as animal feed is a common practice in Vietnam. FW collected from different sources such as restaurants, canteens, hotels was challenged with potential hazards such as biological, chemical and physical. The objective of this research was to estimate the risk of pigs affected by physical hazards (PH), chemical hazards (CH) and biological hazards (BH) via FW. The results revealed that the risk of FW contaminated with PH such as toothpick was medium in fattening pig and it can be eliminated by separation management. The risk of pig stomach damaged by toothpick was higher in pig holders using FW collected from small restaurants. The typical signs of pigs affected with PH were fever, anorexia in a short period of time but the consequences seemed to be medium (i.e. no dead pig due to toothpick was mentioned in interviewed pig holdings). The risk of CH contaminated into FW is higher in fattening pigs than sows in farms using FW collected from small restaurants because of dishwashing liquid contaminated into FW. Regarding to biological hazards, the risk is medium for 2 categories small restaurant and collector house. Results of this study provide interesting information about risk of pig health problems related to re-using FW for pig production in Vietnam.
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