The foundations of our approach

Through its world-class water purification technologies and expertise, Veolia Water Technologies, and its subsidiaries Hydrotech, AnoxKaldnes and Krüger Kaldnes, offer a wide range of solutions that can be tailored to meet the highest standards and provide high quality, energy efficient, operationally friendly water treatment systems.

Kaldnes® RAS

For more than 20 years Krüger Kaldnes has supplied the aquaculture industry with solutions and technologies for high quality water treatment. Krüger Kaldnes as a part of Veolia Water Technologies, comprising world class technical know-how and technologies for water purification. As such Krüger Kaldnes offers a wide range of solutions that can be tailored to meet the highest standards providing prime quality, energy efficiency and operational friendly water treatment systems.

Krüger Kaldnes provides a range of solutions and technologies to the aquaculture industry. Some of our well known technologies includes biological water treatment using the AnoxKaldnes™ MBBR process and solids removal using Hydrotech Drum filters.

The core of our business is our know-how and the drive to develop efficient and operator friendly methods for water treatment. This is often characterized by the fact that our solutions are very compact, with low operating costs and are adapted to our customers' individual needs.

AnoxKaldnes™ MBBR

The Moving Bed Biofilm Reactor (AnoxKaldnes™ MBBR) is our own proprietary technology, and the biological engine of Kaldnes™ RAS. The MBBR technology allows the microorganisms to grow on sheltered, surfaces inside moving, plastic carriers creating a continuous biofilm process without any risk of clogging and without any need for back flushing. Advantages like low head loss and high volumetric capacity make the process compact and well suited to treatment of large water flows. The process is very robust and easily operated with a minimum need for maintenance.

Hydrotech drumfilters

Biomass from the AnoxKaldnes™ MBBR process, fish faeces and excess feed is efficiently separated with Hydrotech drumfilters, another well-known Veolia Water Technologies' technology in the industry. The Hydrotech filters have a high hydraulic capacity, are easy to operate and provide predictable results. Typical mesh sizes are 40-90 micron, but can be delivered with mesh sizes down to 10 micron.