News | October 25, 2018

Switzerland's First CeraMac Water Treatment Plant Operational


The first water treatment plant in Switzerland using PWNT’s CeraMac system was officially opened on 19 October 2018.

The plant, to be known as Quellwasserwerk Sonnenberg, is commissioned by Swiss water utility ewl energie wasser luzern, a utility provider in the city of Lucerne (Switzerland) that supplies electricity, natural gas, heat, water and telecommunication. Designed by H2U, the fully-automated plant is constructed by KG as the principal contractor.

Joke Cuperus, CEO of PWN and interim CEO of PWNT: “We are very proud that ewl has implemented our CeraMac technology in their Quellwasserwerk Sonnenberg facility, being the first one in Switzerland.“

For Stephan Marty, Chairman of the Executive Board of ewl, the opening was a special moment: “Ensuring the supply of water to the people of Lucerne in an efficient and sustainable manner is a responsible task. We have invested around 28 million Swiss Francs and we overcame some challenges during the project. "

Improved productivity
Raw water flows by gravity through three C-37 CeraMac® vessels to treat up to 30 million litres of high-quality drinking water, without the use of chemicals. Each C-37 vessel has 37 ceramic membranes, supplied by Japanese company METAWATER, with very fine pores of 0.1 microns to clean water while maintaining its minerals. The plant is one of the first full scale drinking water plants to use ozone combined with ceramic membranes, to provide improved productivity and enhanced total disinfection.

The CeraMac system has also been installed in drinking water production plants for PWN, PWNT’s mother company, in Andijk (The Netherlands), for South West Water in Plymouth (UK) and for PUB, Singapore’s National Water Agency.

Cost efficiency
PWNT uses ceramic membranes in its CeraMac technology. With the membranes proven to be in continuous operation for more than 20 years in Japan without breakage, and with the ability to contain up to 90 of these in a single vessel, CeraMac represents a major cost-efficiency breakthrough in water treatment.

About PWNT
PWNT is wholly owned by Dutch water utility PWN, and is unique in its formation and mission to make the utility’s more than 98 years of experience and innovations in water treatment available worldwide. Our extensive R&D programmes have led to the development of efficient and sustainable solutions in water treatment based on suspended ion exchange (SIX), ceramic membrane applications (CeraMac), inline coagulation (ILCA and advanced oxidation, applications that can be used for a wide variety of water sources.

All our solutions offer lower life cycle costs, greater efficiency and much lower environmental impact. We work closely with our clients to create optimal results and strongly believe in partnering with highly recognized universities and globally respected companies. PWNT is located in the Netherlands and Singapore. For more information, visit

About ewl energie wasser luzern
ewl is a modern energy service company located in the city of Lucerne and active in Central Switzerland. With 317 employees ewl supplies ecologically and economically sustainable offerings in de field of electricity, natural gas, heat, water, telecommunications, energy services and electrical installations. As a private limited company, ewl is wholly owned by the City of Lucerne. In the 2017 financial year, ewl generated a total income of 272 million Swiss Francs. For more information, visit

Source: PWNT