PROCESS FOR THE BIOLOGICAL REMOVAL OF CARBON, NITROGEN AND PHOSPHORUS NUTRIENTS IN WASTEWATER.

摘要

The method is of the type consisting in circulating the raw water to be treated in cells or biofilters with submerged filter beds operating anaerobic then aerobic or vice versa. BR/ According to the invention, a treatment module is used comprising at least two cells or biofilters in series (for example a biofilter in anaerobiosis and one to five biofilters in aerobiosis) by cyclically alternating anaerobic phases then aerobiosis, the entry of flow to be treated always taking place in the anaerobic cell. Advantageously, each phase of the cycle is separated by a phase and time delay comprising stopping the supply of water to be treated.