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Items Tagged with 'reverse osmosis'

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What is reverse osmosis and how is it best used?

In wastewater treatment, reverse osmosis is a water purification technology that, like ultrafiltration, uses a semipermeable membrane to remove larger particles from drinking water. But in reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential, a thermodynamic parameter.
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Why pump when you can vacuum?

Replacing bleach dosing unit ends leaks, ingredient shortage for ultrafiltration backwash
Substituting a vacuum feeder for the bleach (NaOCl) pump used in ultrafiltration backwash eliminated frequent pipe and valve leaks.
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It gets ugly quick, when the water runs out

From Los Angeles to San Francisco Bay, at least 15 desalination-plant proposals are current along the California coast. No wonder all eyes are on the $1-billion Carlsbad desalination plant. Post 2016, it’ll knock out about 50 million gallons of potable water a day and be the largest such plant in the Western hemisphere.
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