Since over 30 years, WEHRLE Umwelt is specialised on the treatment of landfill leachate and industrial effluents, e.g. for Food & Beverage, Chemical, Pharmaceutical, Petrochemical, Iron & Steel, Pulp & Paper, Laundries, digestate & pig manure etc.
The NECON GmbH was founded in 1981 by Dr. Ing Klaus Gebhardt as an engineering company
founded for automation engineering and metal construction. Today we are one of the world's
leading suppliers in the field of chemical-free water disinfection and
innovative filtration technology.
We are a design and engineering firm working in the field of wastewater and organic waste treatment.
LEEN GmbH is a joint venture between IREES GmbH and Fraunhofer Gesellschaft e.V.
We develop and market the LEEN Management System. With it, we provide a tool for Learning Energy Efficiency Networks all over the world.
In 2010 the firm Ritter XL Solar GmbH, based in Karlsbad near Karlsruhe in Germany, was founded as the youngest member of the Ritter Group. The focus of Ritter XL is the development, distribution, planning and installation of large- and very large-scale solar thermal systems.