|-
|[[Image:Icon_biosand.png|center|link=http://akvo.org/wiki/index.php/Slow_Sand_Filter]]
|[[Image:Icon_biosand.png|center|link=http://akvo.org/wiki/index.php/Rapid_sandRapid_sand_/gravity_filtration_gravity_filtration]]
|[[Image:Icon_biosand.png|center|link=http://akvo.org/wiki/index.php/Upflow_roughing_filter]]
|[[Image:Chulli icon.png|center|link=http://akvo.org/wiki/index.php/Chulli_pasteurization]]
|-
|[[Image:slow sand filter small.jpg|center|150px|link=http://akvo.org/wiki/index.php/Slow_Sand_Filter]]
|[[Image:rapid sand filter small.jpg|center|150px|link=http://akvo.org/wiki/index.php/Rapid_sandRapid_sand_/gravity_filtration_gravity_filtration]]
|[[Image:upflow roughing filter small.jpg|center|150px|link=http://akvo.org/wiki/index.php/Upflow_roughing_filter]]
|[[Image:chulli pasteurization small.jpg|center|150px|link=http://akvo.org/wiki/index.php/Chulli_pasteurization]]
|-
|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Slow sand filter]]</div>
|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Rapid_sandRapid_sand_/gravity_filtration_gravity_filtration|Rapid sand / <br>gravity filtration]]</div>
|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Upflow roughing filter]]</div>
|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[Chulli pasteurization]]</div>
