Food residue recycling by swine breeders in a developing economy: A case study in Da Nang, Viet Nam

This study provides a detailed description of food residue collection by swine breeders in Da Nang, Viet Nam. In January 2011, the study surveyed 30 swine breeders in two villages with respect to locations, methods, prices, quantities, and prospects for food residue collection. The sampled swine breeders regularly visited 55 locations in central Da Nang to collect raw food residue. They then transferred the food residue to their piggeries, boiled it, and fed it to their swine. A regression analysis revealed that the total amount of food residue collected by a farm depends on the number of swine in the farm and the number of collections made per day. Swine breeders in Da Nang were estimated to collect 26.3 metric tons of organic waste per day, which amounted to 4.1% of domestic waste collected by the local government. Among the sampled swine breeders, 93% answered that they would continue using food residue for the next five years.

► We surveyed food residue recycling by swine breeders in Da Nang, Vietnam.
► Details of the recycling activities were unveiled for the first time.
► Collection amounts were correlated with farm sizes and collection frequencies.
► Estimated food residue recovery was 4.1% of MSW collection by the local government.