preferential price two-stage ro reverse osmosis mexico
Reverse osmosis stage vs pass - Lenntech. A 'pass' shall be seen as a stand alone RO system . The difference between a single pass RO system and a double pass RO system is that with a double pass RO, the permeate from the first pass becomes the feed water to the second pass (or second RO) which ends up producing a much higher quality permeate because it has essentially gone through two RO systems.
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