PROCESS AND INSTALLATION FOR TREATING WASTE WATER BY BIOLOGICAL ACTIVATION

摘要

The invention relates to a process and to an installation for purifying waste water by biological activation The process consists in biologically purifying the waste water by an activation process, during which nitrification occurs, such that the activation mixture is brought into a circulation system by impurified waste water admission where the purified water is recharged during each circulation The activated thickened mixture together with untreated waste water are oxigenated by pneumatic aeration, keeping the activated sludge in suspension so that the circulation intensity of the activated mixture be at least the double of that of the prepared purified water According to the invention, the installation comprises a tank, separation spaces (4) and distribution channels (5) longitudinally disposed in the upper section Each separation space is defined by partition and side walls and is provided with communication pipes with an activation space on a longitudinal side