Almost 80% of phosphate (P) in Danish wastewater is reused as fertiliser in agriculture from biosolids produced in wastewater treatment plants.
Recovery of high-value P-products also holds great potential. A project supported by Innovation Fund Denmark has evaluated this. Aalborg University and University of Southern Denmark – together with water utilities and consultants – tested and optimised novel methods and approaches for improved recovery of high-value P-products from wastewater treatment plants of which most had biological P-removal and anaerobic digesters. New methods for speciation and quantification of polyphosphate accumulating microorganisms and chemical P-containing components were developed, allowing detailed P-mass-balances. Development of crystallization of high-purity CaP from digester digestate by the OxyCrysPTM technology was very successful. LDHs as filter and ion exchange material as well as application of membranes were very promising to recover or crystallize P-products.
Contributors to this solution
As one of the most innovative water companies in Denmark, we feel obliged to support the water industry. We have extensive knowledge of the operation of various facilities, establishment of organisations, analysis, tendering, planning, project management, training and commissioning of facilities. We would like to do our share towards ensuring innovation of the Danish water industry. By also taking a global perspective, we contribute knowledge and support for Danish exports and help set the global agenda for sustainable development.
University of Southern Denmark, Faculty of Engineering
With more than 20 research units, 25 engineering study programmes and 3500 students, The Faculty of Engineering at the University of Southern Denmark boasts both research and education at the highest international level.
The Faculty of Engineering is located in the cities of Odense and Sønderborg, and the Faculty
Herning Vand is an independent utility company which handles wastewater in the municipality of Herning, and provides 60% of the citizens in the municipality with clean drinking water.
Our goal is to deliver healthy water at the lowest price possible – without sending the bill on to our children
Krüger has significant experience and expertise in water and wastewater treatment. The technologies developed by Krüger are widely used in many countries. Krüger is dedicated to the development of new technologies to improve effectiveness and optimize operations. The innovative solutions are adapted to local needs. Value can be added e