The planning, sale, installation and commissioning of water treatment plants (wastewater and drinking water) for industrial and municipal applications, in particular the promotion of research and development of DAF technology, execution of services and consulting, trade in devices and components for water treatment, participation in companies active in water supply and disposal, may participate in other companies of the same type or similar, acquire companies and open branches, promote and implement environmental protection measures, as well as acquire, manage and sell real estate and land both in Switzerland and abroad.