| 摘要 |
<p>An apparatus (1) for controlling biological treatment of waste water employs a substantially air tight supported biological filter unit (2) having a liquid inlet (4), outlet (6) and exhaust gas vent (5). Substantially pure oxygen is supplied to said filter (2) and controlled in response to a control signal from a control means, adapted to monitor the oxygen consumption rate, to adjust the oxygen supply rate to maintain a predetermined oxygen consumption. <IMAGE></p> |
