| 摘要 |
<p num="1"><br/><br/><br/>A method of backwashing a membrane filtration module, where the module <br/>includes one or more membranes located in a feed-containing vessel. The <br/>membranes having a permeable wall which is subjected to a filtration operation <br/>wherein feed liquid containing contaminant matter is applied to one side of <br/>the membrane wall and filtrate is withdrawn from the other side of the <br/>membrane wall. The method includes the steps of suspending the filtration <br/>operation; aerating the membrane surface with gas bubbles to dislodge fouling <br/>materials therefrom; recommencing the filtration operation while suspending <br/>the flow of feed liquid to the feed-containing vessel for a predetermined <br/>period; again suspending the filtration operation; performing a liquid <br/>backwash of the membrane wall to dislodge fouling materials therefrom; <br/>removing at least some of the liquid containing the dislodged contaminant <br/>matter from the feed- containing vessel; and then recommencing the filtration <br/>operation.<br/>
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