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The Cristal
process combines ultrafiltration and adsorption on powdered
activated carbon (PAC).
This involves injecting powdered carbon into untreated water.
This material, made up of pores, acts as a trap for certain
undesirable molecules (pesticides, micro-pollutants, organic
matter, etc.) that are smaller than the pores of ultrafiltration
membranes. The powdered activated carbon contained in the
untreated water will then itself be retained by the ultrafiltration
membranes.
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The Aquasource
ultrafiltration process |
This physical treatment process is only
possible due to the presence of a recirculation loop that works
as a reactor which concentrates the carbon particles.
The Cristal
process is a Degrémont
product.
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