An Almost Zero Discharge Concept for the CAN/NPK Plant of UKF Ijmuiden Has Been Developed to Meet the Stringent Rules for Water Pollution Control in the Netherlands

A review is given of the regulations for water pollution control in the Netherlands. A description of the CAN/NPK plant which consists of 4 units for the production of 750,000 tonnes per year is outlined. The main sources for pollution of this plant, the actions taken so far and the experiments done to bring these effluent losses down for 40% are discussed. The program developed for a further reduction consists mainly of a circulation washing system for the production units and a dissolving tank for the spills in the plant. The washing liquid is circulated and supplied to the process. When this program is completed the water pollution is brought down for another 50% to about 10% of the original level.