| 摘要 |
<p>In this process and this device, air and/or pure oxygen is passed into the waste water in an aeration tank in the presence of biomass which is immobilised on carrier particles, and the waste water is subsequently separated into purified water and activated sludge in a secondary sedimentation. Since the biomass in the core of the carrier particles dies off gradually, the invention provides acceleration and slowing-down devices which allow regeneration of the carrier particles. In this process, the carrier particles are accelerated and then slowed down, so that according to the kinetic energy which is set free, a compression of the carrier material in some parts and therefore a loosening and partial elimination of the dead biomass are achieved. The biomass concentration in the carrier particles can be controlled by changing the speed at which they leave the accelerating zone. (Figure) <IMAGE></p> |
