In our group we have developed a number of technologies in water treatment, energy (biogas) production and nutrient recovery. Among those are state of the art technologies for nutrient recovery of Phosphorus (ANPHOS®), Nitrogen (AMFER®) and Sulphur (BIDOX®), each based on the C-2-C concept. Furthermore we have developed a unique and sustainable technology for nitrogen removal from waste water (NAS®) and for digestate mixing and processing (Digestmix®). In order to further improve the effluent quality to fresh water quality for boiler feed or cooling towers or to process water, a new RO-Recycle® process has been developed. Current state of the art RO systems are capable of phosphate removal such that chemical de-phosphatization steps can be skipped after biological water purification.

These technologies were realized in close collaboration with academia in various parts of Europe, e.g. University of Gent (Belgium), Ionina (Greece), Kopenhagen (Denmark) and Utrecht (The Netherlands). In this way a broad spectrum of technologies has been developed over the past 25 years. These technologies enable our group to provide focused add-on solutions to a given type of technological challenge, but at the same time offer a holistic project approach for our customers. Not only will Aquest Colsen deal with the water treatment aspect of a project, we will also ensure that energy and nutrient recovery are part of a sustainable solution. In addition, Aquest Colsen will not only look into the optimized bioconversion of waste streams, we will also ensure that the biogas thus produced is further processed in the most economic and environmentally friendly manner. In those cases where project execution requires permits for the local authorities, we are capable of assisting in their preparation. Through our strong bonds with universities, we are able to constantly improve our technology portfolio.

Our group has executed projects in Western and Eastern European countries as well as in North and South America and in Africa. For the purpose of project execution and marketing, we have a network of local partners in each country.