| 摘要 |
<p>Disclosed is a process and a facility (1) for treating ammonium-containing wastewater (2) in a deammonification facility (1) having at least one activation tank (3). According to the disclosure, it is provided that activated sludge from the activation tank (3) is introduced at least intermittently into a hydrocyclone (5) and that, after the separation of the activated sludge in the hydrocyclone (5) both the dense fraction and the light fraction which predominantly contains the aerobically ammonium-oxidizing bacteria (AOB) are returned to the at least one activation tank (3) of the facility (1). During the separation of the activated sludge in the hydrocyclone (5), the anaerobically ammonium-oxidizing bacteria (anammox) having a higher density than the aerobically ammonium-oxidizing bacteria (AOB) are sedimented on a roughened intemal wall surface of the hydrocyclone (5) by the centrifugal and hydrodynamic forces in the hydrocyclone (5) and abrasive forces are generated by a relative motion between the rapidly moving anaerobically ammonium-oxidizing bacteria (anammox) and the stationary roughened internal wall surface of the hydrocyclone (5), via which abrasive forces an organic or inorganic plaque present on the ammonium-oxidizing bacteria (anammox), in particular Planctomycetes granules, is at least partly removed.</p> |
