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Slow Sand Filtration

The Material

Slow sand filtration has been a reliable method of water purification for approximately 150 years, requiring no chemicals or electricity to operate.

The process takes place over a large surface area, with Waste Water Treatment Works' having several large beds, and involves the formation of a biofilm of living organisms on top of a fine layer of sand. The sand and biolayer is submerged in water allowing the organisms to eat potentially harmful pathogens while clean, potable water filters through the membrane. 

Our Solution

An important part of the slow sand filter purification process is maintaining the cleanliness of the sand to ensure clean water and an optimum rate of flow through the filter. 

CDEnviro equipment provides a consistent supply of clean, dry filter sand which is uniform in size and meets all the requirements for slow sand filtration media. 

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