Krüger Kaldnes was established in 1989. The head office is located in Hinderveien in Sandefjord. In 2007, Krüger Kaldnes became part of the international Veolia group - the leading specialist in water treatment. In 2021, Krüger Kaldnes leaves the aquaculture market and focuses fully on the municipal and industrial sector. We specialise in treating municipal and industrial wastewater. Our expertise is deliberately focused on preserving the environment: we help you reduce your carbon footprint and optimize your water consumption. Wastewater produced by industrial processes can be challenging to treat due to its composition and fluctuating pollutant load. In response to increasingly strict regulations and environmental concerns, manufacturers are looking for both effective and sustainable solutions to treat effluent before it is reused or safely discharged into the natural environment. We provide a range of industrial wastewater treatment systems suitable for all major industries. We create technologies for sustainable development. The [**Kaldnes™MBBR**](/en/technologies/anoxkaldnes-mbbr "AnoxKaldnes™ MBBR ") technology has revolutionised the water and wastewater sector, and has been implemented in over 550 facilities in over 45 countries worldwide. Previous ![](/sites/g/files/dvc3341/files/styles/carousel/public/image/2020/12/WEB-ready-13.jpg.webp?itok=I_WeHr3g) ![](/sites/g/files/dvc3341/files/styles/carousel/public/image/2020/11/Welder_Homepage%20Banner_Carousel_816x472.png.webp?itok=UvOEOB6i) ![](/sites/g/files/dvc3341/files/styles/carousel/public/image/2020/11/VWT_Sundsfjord%20MBBR%20case.jpg.webp?itok=w8F54RGk) ![](/sites/g/files/dvc3341/files/styles/carousel/public/image/2020/12/MBBR%20filter%20-%20teknologi.jpg.webp?itok=8aXwiQw4) Next [ ![](/sites/g/files/dvc3341/files/styles/content_push_teaser/public/image/2023/07/kruger_people.jpg.webp?itok=2FOovUss) ](/en/about-us/careers-veolia-norway "Join us") [Join us](/en/about-us/careers-veolia-norway "Join us") Veolia employees are waiting for you to join them in their pursuit of a common goal: to value water resources around the world. Join a large company with rich and fulfilling career opportunities, where professional and personal development is prioritised. [Read more](/en/about-us/careers-veolia-norway "Read more") [ Our story ](#panel_4166) ![Moving bed biofilm reactor](/sites/g/files/dvc3341/files/styles/default/public/image/2021/06/2021-06-21.jpeg.webp?itok=9dE6ng3C) ## The story begins in 1985, when Professor Hallvard Ødegaard at the Norwegian University of Science and Technology (NTNU) started researching a new idea for cleaning water. ![](/sites/g/files/dvc3341/files/styles/default/public/image/2020/12/Professor%20Hallvard%20%C3%98degaard.png.webp?itok=o2ps8LrV) Prof. Hallvard Ødegaard The result of his extensive research was a new technology for processing wastewater called Moving Bed Biofilm Reactor (MBBR). Today Kaldnes MBBR is one of the most advanced biological processes for cleaning wastewater and one of the most significant environmental success stories in Norway. Throughout the years, we still have close contact with established research environments such as (NTNU) in Trondheim. ### Patent, awards and acquisitions In Tønsberg, Norway 1989, Kaldnes Miljøteknologi was established to commercialize and patent MBBR in 1991. Kaldnes Miljøteknologi originated from a company called Kaldnes Mekaniske Verksted, which dates back to 1899. In 1994 [Kaldnes MBBR](/en/technologies/anoxkaldnes-mbbr "AnoxKaldnes™ MBBR ") was installed in the Olympic City in Lillehammer, Norway, and in 1995, Anglian Water acquired Kaldnes Miljøteknologi. Kaldnes MBBR is one the best documented biological processes for cleaning municipal wastewater. There is no exaggeration in claiming that the Kaldnes MBBR process probably is the largest environmental success in Norway within the water and sewerage sector. So much so that Kaldnes Miljøteknologi won the “Stockholm Industry Water Award” in 2001, and in 2002, Anglian Water was acquired by Swedish-based company Anox AB. In 2004, Anox AB and Kaldnes Miljøteknologi changed its name to AnoxKaldnes. In 2005, AnoxKaldnes AS acquired JO Water Technology AS and strengthened their position within the market. ### Resourcing the world with Veolia In 2007, the global French group Veolia acquired AnoxKaldnes and in 2008, the company changed its name to Krüger Kaldnes AS. ### Milestones **1985** Professor Hallvard Ødegaard starts researching MBBR **1986** Anox AB was established in Lund in Sverige **1989** Kaldnes Miljøteknologi AS is established in Tønsberg, Norway **1990** The first MBBR facility is delivered **1991** Global patent application is granted for MBBR **1994** Installation of Kaldnes MBBR in the Olympic City in Lillehammer **1995** The company becomes 100 percent owned by Anglian Water **2000** Anox AB in Sverige acquires 15 percent of the Kaldnes Miljøteknologi AS **2001** A new department is established in Rhode Island, USA **2001** Award winner of “Stockholm Industry Water Award” **2002** Anox AB acquires 100 percent of the stocks of Kaldnes Miljøteknologi AS **2004** The company changes its name to AnoxKaldnes AS **2005** AnoxKaldnes AS acquires JO Water Technology AS **2005** A new department is established in Beijing, China **2006** Branch office at Hegnasletta in Sandefjord, Norway **2007** 100 percent owned by the French group Veolia Water Technologies **2008** Changes name to Krüger Kaldnes AS, and establishes aquaculture as business area **2009** Celebrating 20 years anniversary **2017** Branch office at Nordre Fokserød in Sandefjord, Norway ## Locations [](/en/about-kruger-kaldnes.md?display=switcher_google_map "Map") [](/en/about-kruger-kaldnes.md?display=switcher_grid "Grid") ### [Sandefjord HQ](/en/about-us/kruger-kaldnes/locations/sandefjord-hq "Sandefjord HQ") Hinderveien 2 Sandefjord 3223 Norway [More details](/en/about-us/kruger-kaldnes/locations/sandefjord-hq "Sandefjord HQ")