To address the problem of animal waste in Hoa Binh Province of North Viet Nam, a PES-like scheme for pig farmers has been developed since 2006. Biogas technology is promoted to manage liquid waste, control odours, and to improve well beings. The use of biodigesters will compel farmers to change farming system and result in provision of environmental services and increased household income. This is a pilot and expected benefits include non-contamination of water sources, elimination of stench, improvement of nitrogen cycling, and control of soil erosion through use of compost in marginal sloping areas.
