| 摘要 |
<p>PCT No. PCT/DE87/00273 Sec. 371 Date Feb. 6, 1989 Sec. 102(e) Date Feb. 6, 1989 PCT Filed Jun. 12, 1987 PCT Pub. No. WO87/07590 PCT Pub. Date Dec. 17, 1987.In a method and a device for the widespread fine-bubble aeration of liquids, resilient, perforated membranes, which are preferably in the form of aeration hoses, are arranged in a liquid receptacle and are maintained horizontal by means of holding and guiding devices and are stretched, relative to their rest states, preferably by means of tensioning devices. Because of the stretching, the passage of the gas is improved and a uniform, finely dispersed gas bubble formation is produced. For clearing the perforated membranes of blockages of the perforations, the streteched state of the membranes is briefly released and subsequently again reproduced. For strong impurities, the gas supply is interrupted, the membranes are exhausted of gas and water, the stretched state is subsequently released and, after a predetermined time, gas is again fed into the perforated membranes and then the stretched state is reproduced.</p> |
