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|style="background:#efefef;"|[[Image:screens small.jpg|center|100px|link=Screens and straining]]
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|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Granular filtration颗粒过滤法]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Upflow roughing filter]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Slow sand filter]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Active carbon活性炭]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Membrane filtration]]</div>
|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Screens and straining]]</div>
===实地经验===
这个项目正使用社区级的过滤技术。
