Get our free book (in Spanish or English) on rainwater now - To Catch the Rain.

Difference between revisions of "Slow sand filtration"

From Appropedia
Jump to: navigation, search
m
 
(4 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{TOCright}} Slow sand Filters work by allowing gravity to draw water through a filter media that composed of sand and gravel. This type of filtration is differs form Gravity filtration in that Gravity filtration systems are generally designed to be back washed, when the filter becomes clogged. In slow sand filtration the top layer of sand acts to trap devolved solids and so when the filter becomes clogged instead of backwashing the whole system only the top layer of sand is removed and discarded. This saves the operators of the water treatment system the expense of having to design a backwash system.
+
{{TOCright}}
 +
'''Slow sand filters''' are suitable for community or municipal level water treatment, and provide a very high quality output of water with relatively simple operation, and are used in wealthy nations as well as [[poor communities]].  
  
More Information can be found about Slow Sand Filtration by contacting the Office of Water Programs at CSU Sacramento
+
Slow sand filters work by allowing gravity to draw water through a [[filter media]] that composed of [[sand]] and [[gravel]]. This type of filtration is differs from gravity filtration in that gravity filtration systems are generally designed to be back washed, when the filter becomes clogged. In slow sand filtration the top layer of sand acts to trap devolved solids and so when the filter becomes clogged instead of backwashing the whole system only the top layer of sand is removed and discarded. This saves the operators of the water treatment system the expense of having to design a backwash system.
[http://www.owp.csus.edu/training/courses/drinking_water/sws1.php]
+
 
 +
Its downsides are the large area used and occasional downtime after maintenance; however both of these can be reduced by changing the system of maintenance, and ploughing rather than scraping the surface.
 +
 
 +
The [[Biosand filter]] takes the water cleaning functionality of a Slow sand filter and concentrates it into a smaller point-of-use/household appliance.  
 +
 
 +
== See also ==
 +
 
 +
* [[Original:Slow sand filtration water treatment plants]]
 +
 
 +
== Interwiki links ==
 +
 
 +
* [[Wikipedia:Slow sand filter]]  
  
== Location ==
 
 
== References ==
 
== References ==
 
<references/>
 
<references/>
See [[Help:Footnotes]] for more.
+
* More Information can be found about Slow Sand Filtration by contacting the Office of Water Programs at CSU Sacramento[http://www.owp.csus.edu/training/courses/drinking_water/sws1.php]
<!-- This will automatically put the citations from within the <ref> </ref> tags above. -->
+
* Water Treatment Plant Operation, A field Study Training Program. California State University Sacramento Office of Water Programs 2008
Water Treatment Plant Operation, A field Study Training Program. California State University Sacramento Office of Water Programs 2008
+
  
== Categories ==
 
 
[[Category:Water and sanitation for developing countries]]
 
[[Category:Water and sanitation for developing countries]]
<layout name="AT device" />
+
[[Category:Water filters]]

Latest revision as of 17:28, 7 April 2016

Slow sand filters are suitable for community or municipal level water treatment, and provide a very high quality output of water with relatively simple operation, and are used in wealthy nations as well as poor communities.

Slow sand filters work by allowing gravity to draw water through a filter media that composed of sand and gravel. This type of filtration is differs from gravity filtration in that gravity filtration systems are generally designed to be back washed, when the filter becomes clogged. In slow sand filtration the top layer of sand acts to trap devolved solids and so when the filter becomes clogged instead of backwashing the whole system only the top layer of sand is removed and discarded. This saves the operators of the water treatment system the expense of having to design a backwash system.

Its downsides are the large area used and occasional downtime after maintenance; however both of these can be reduced by changing the system of maintenance, and ploughing rather than scraping the surface.

The Biosand filter takes the water cleaning functionality of a Slow sand filter and concentrates it into a smaller point-of-use/household appliance.

See also[edit]

Interwiki links[edit]

References[edit]

  • More Information can be found about Slow Sand Filtration by contacting the Office of Water Programs at CSU Sacramento[1]
  • Water Treatment Plant Operation, A field Study Training Program. California State University Sacramento Office of Water Programs 2008