In Pirmasens, wind and solar power is turned into gas and heat

Integration of the wastewater treatment plant

Utilization of by-products

By generating the by-products of the planned hydrogen electrolysis plant (-> oxygen and heat), cooperation with a sewage treatment plant is to be developed as part of sector coupling.

This should make it possible to use the waste heat for sewage sludge drying and the oxygen for oxygen gassing in the wastewater treatment plant’s aeration tank.

The plan is therefore to build infrastructure including earthworks and traffic routes, building technology and media connections (especially with oxygen) to the Felsalb sewage treatment plant.

Wind power and photovoltaic systems

Wind and solar energy as an energy source

By generating energy from renewable energy sources, energy is produced in an environmentally friendly and resource-saving way.

The plan is to integrate this generated energy into our cycle.

Hydrogen production

Electrolysis – conversion of surplus electricity

By using water electrolysis, surplus electricity can be adequately utilized and by-products can be efficiently reused.

Our aim is therefore to use a water electrolysis plant with a hydrogen production capacity of 400 Nm3 to utilize surplus electricity from renewable energy generation.

The resulting by-products (heat and oxygen) are to be used efficiently (see integration of the sewage treatment plant).

Advantages of water electrolysis:

• Longevity of the main components (>20 years)
• High annual running performance
• Pressure electrolysis up to 60 bar (low maintenance compression)
• Operation at temperatures >90 ° C
• Hydrogen production efficiency of up to 90%
• Heat injection/extraction into the local/district heating network
• Use as secondary reserve (shutdown time < 5 minutes)
• Use of oxygen (see integration of the wastewater treatment plant)