Process for the biological purification of water or waste water to remove organic nitrogen-contaning impurities

摘要

To reduce the expenditure in terms of apparatus, in particular for back-flushing, for a combined denitrification/nitrification step in a water treatment plant, or a plant for purifying waste water, granular filter material (3) is used as biomass carrier in a reactor (1) in the denitrification step, and immobilised carrier elements (26) which have a regular geometric structure, for example static mixing elements, are used in a reactor (14) in the nitrification step.