| 摘要 |
<p>PCT No. PCT/DE90/00557 Sec. 371 Date Jan. 16, 1992 Sec. 102(e) Date Jan. 16, 1992 PCT Filed Jul. 24, 1990 PCT Pub. No. WO91/01948 PCT Pub. Date Feb. 21, 1991.A process for biological treatment of waste water is characterized by the following sequence of steps: mixing of the incoming raw waste water with activated sludge containing a first, chemoorganotrophic biocenosis in an anerobic preliminary stage (APS); separation of the solution from the activated sludge in an intermediate settling basin (IS); nitrification of the separated solution by means of a second, chemolithotrophic biocenosis in a nitrification stage (NIR) with an aerobic medium; remixing of the nitrified solution with the activated sludge containing the first, chemoorganotrophic biocenoses; common denitrification of the mixture of solution and activated sludge in a denitrication stage (DER) with an anoxic medium; aeration to obtain an aerobic medium; separation of the purified waste water from the activated sludge in a resettling basin (RSB); recycling (C) of the activated sludge to the anaerobic preliminary stage (APS).</p> |
