The Green Hub in Amsterdam hosts the first mini biodigester in the urban living environment in the Netherlands. It runs on locally collected food waste (swill) and produces methane and liquid compost. The green gas is distributed amongst everyone delivering the swill (a school, restaurants, community centre and the Green Hub). The liquid compost (when sanitized) feeds horticulture and aquaponics. It serves as a showcase in how a community can produce her own energy with swill. The involvement of the school and the school kids is essential in this cooperation that will include educational programmes. The local government, businesses, organizations and citizens can cooperate in this biodigester project, combining social and sustainable issues . This is what the Green Hub calls a Donut Deal.