Process and apparatus for purification of water polluted by nitrogenous waste products.

摘要

Process for purifying a water polluted with soluble and insoluble nitrogenous waste by a physicochemical and biological treatment, and apparatus utilising such a process, comprising the filtration by passing the water upwards through a stationary immersed bed (22) of granular material (23) filled with biomass (13). The process is characterised in that, directly before filtration, the oxygenation of the polluted water is completed with air while the polluted water spills over by gravity in a vertical fall (11) above means (30) for feeding the bed at the bottom (12).