| 摘要 |
<p>PCT No. PCT/EP96/04326 Sec. 371 Date Jun. 8, 1998 Sec. 102(e) Date Jun. 8, 1998 PCT Filed Oct. 4, 1996 PCT Pub. No. WO97/13726 PCT Pub. Date Apr. 17, 1997The invention relates to a process for the biological treatment of waste water, in which a mixture of activated sludge and waste water is treated with gas in an activation stage and the activated sludge is separated off from the treated waste water by flotation, wherein the concentration of the activated sludge in the activation stage is >/=6 g/l and wherein the flotation is a pressure-relief flotation.</p> |
