| 摘要 |
<p>The invention relates to a multi-stage biological waste water purification method with interrupted operation inside a device comprised of at least two pre-purification reactors (2), of a purification reactor (3) and of an internal recirculation air circuit, which is at least connected to a compressed air source (31). The invention is characterized in that the purification process, which is independent, controlled and proceeds according to the characteristic quantities that are set beforehand, takes place according to a selected time interval or volume of the inflowing waste water inside each of the pre-purification reactors (21, 22). Said purification process consists of the aeration of the water to be purified and of the selected combination of the purification phases, which are made by thoroughly mixing the water to be purified and the sludge deposit in conjunction with transferring the pre-purified water into the purification reactor (3) by pumping, inside of which the entire purification process simultaneously takes place. This purification process consists of the aeration or of the aeration combined with the thorough mixing of the water to be purified and of the sludge deposit as well as of the removal of the purified water by pumping, and of the recirculation of the return sludge into each or into one of the pre-purification reactors (21, 22) while occasionally removing the excess sludge out of the device by pumping. The beginning or end of the individual phases of the purification processes inside the pre-purification reactors (21, 22) or inside the purification reactor (3) is initiated by switches (35, 36) on the basis of an evaluation of the fluctuation of the level inside the purification reactor (3).</p> |
