Submitted by: Wassergenossenschaft Mellau
Implemented country: Austria
Title: Water Cooperative Mellau combines drinking water supply with eco-power generation
The Water Cooperative Mellau in Vorarlberg (Austria) supplies 1200 residents with drinking water from nearby springs. In the course of replacing the pressure lines and source lines, a drinking water and micro-power plant was constructed. Beyond the economic feasibility, leading factors for initiating the project were operational security through self-generation and ecological hydropower generation without additional environmental impact. Implementation costs for the micro-power plant were €200,000; annual income yields (worst case) €18,.000, for an amortization period of 10-15 years. The plant has been in operation since 2007 and generates 300,000 kWh of power annually. The generated power, except for a small portion for operating the drinking water system (ground water pumping station, water tower, ...) is fed into the public grid.