Process and apparatus for the removal of ammonia from waste water, surface waters or ground water

摘要

The process makes use of biological nitrification in which ammonium is oxidised to nitrate in a reactor system (3, 9) with the aid of a biocatalyst (4, 12, 19) with immobilised cells which are entrapped in a gel or polymer. Preferably used are defined high-efficiency mixed cultures of nitrifiers (Nitrosomonas, Nitrobacter etc.). To achieve a high rate of breakdown, oxygen and carbonate or CO2 must be metered into the reactor system. The use of cells entrapped in a polymer means that the reactor productivity can be increased by a factor of 10-20 compared with classical processes.