Madrid to generate green hydrogen using recycled water, PV, biogas – pv magazine International (pv-magazine.com)
City of Madrid is installing a first of its kind system to better utilize renewable energy sources in its wastewater processes. Solar and biomass are coupled to produce power on-site and green hydrogen that can be used to produce power when solar is not available. The initial phase will produce up to 80,000 kg of hydrogen a year. This is the equivalent of about 100,000 therms of natural gas, enough to produce about 1 million kWh of power when combusted in a turbine.
Treated water from the plant will be converted into hydrogen and oxygen when the solar panels produce more power than is needed at the plant. Methane from the treatment process is also burned to provide electrical power. The hydrogen can be stored and used to produce power. The oxygen is used to enhance the efficiency of the treatment process, which involves aerating water for bacteria – a really cool two-fer! It also creates energy storage, which is essential for using intermittent renewable energy resources. – Steve Terry, DTC HVAC & Refrigeration Instructor
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