| 摘要 |
<p>The invention relates to a method for purifying waste water which combines membrane filtration and electrolysis and in this way permits a high purifying effect with virtually no backwashing. Purification yields a high-quality waste water which is suitable, for example, as process water in household use. The corresponding installation is compact and can be used as a domestic fitting, outdoors or for retrofitting to existing water treatment works. According to the invention the waste water is fed into a container comprising a cathodic membrane and an anode. The waste water passes through the membrane which repels negatively ionized particles which then become deposited on the anode. By cyclic reversal of anode polarity the particles are repelled again by the anode and settle on the inclined bottom of the container. The sediment is withdrawn via a sludge discharge line. The cathodic membrane is backwashed during reversal of anode polarity.</p> |
