König-Brauerei reduces site-specific CO2 emissions from heat generation by 67%

Waste heat steam from thyssenkrupp Steel Europe provides thermal energy for brewing processes

In June 2024, a new power supply system for the König-Brauerei went into operation. Through its collaboration with thyssenkrupp Steel Europe and E.ON, the brewery reduced its site-specific CO2 emissions from heat generation by 67% in 2025 compared to the base year of 2023. This measure concerns all beer production processes for which energy is needed in the form of heat. It involves the König-Brauerei using waste heat steam from thyssenkrupp Steel Europe's existing waste heat network.

Using steam to generate new energy

Here’s how the new energy supply system works: Brewers need thermal energy to heat the mash and boil the beer wort. This is supplied by thyssenkrupp Steel Europe in the form of zero-emission waste heat steam. The steam thus used is a byproduct of steel production and blast furnace gas recovery, among other things. This is confirmed by a study conducted by the University of Duisburg-Essen, which assesses the project's CO2 emissions.

The steam is conducted to the König-Brauerei through a newly constructed pipeline that is approximately 450 meters long. It connects the brewery to thyssenkrupp Steel Europe’s existing waste heat network. The König-Brauerei uses the thermal energy contained in the steam to generate fresh steam for brewing processes with the help of a heat exchanger. This eliminates the need to burn fossil fuels in these processes, as was previously required.

“Our new energy supply system is a flagship project for the use of industrial waste heat in Duisburg and the Ruhr region,” emphasizes Guido Christiani, Managing Director of the König-Brauerei. Germany’s Federal Ministry for Economic Affairs and Climate Action has provided financial support for the new energy supply system as part of the “Energy Efficiency in the Economy” funding competition.

Working together to reduce site-specific CO2 emissions

Since June 2024, waste heat steam from thyssenkrupp Steel Europe has been supplying thermal energy for brewing processes. As a result of this, during normal operations in 2025, the König-Brauerei reduced its CO2 emissions from heat generation by 67% compared to the base year of 2023; energy management is handled by E.ON.