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De-aerated Water as Potable Water

De-aerated Water as Potable Water

De-aerated Water as Potable Water

Hi all,

We have excess de-aerated water in Oil and Gas facility that we are planning to treat with RO to produce wash water. We also have requirement for potable water fire water. It will be more cost effective to further treat de-aerated permeate with remineralizer and use as Potable Water.

Are there any issues associated with using de-aerated (DO < 10 ppb) permeate treated with remineralizer as potable water? De-aerated permeate will be first stored in a tank blanketed with either nitrogen or fuel gas. Which should be more suitable?

De-aerated permeate shall also be used as fire water.

Is this feasible?

RE: De-aerated Water as Potable Water

Not sure what you are calling "de-aerated", but there are no issue associated with oxygen content in water regardless of the oxygen content. Oxygen content is not a parameter that is even measured in potable water treatment.

Sometimes, naturally occurring well waters contain dissolved gases and these waters are aerated to remove the dissolved gases. Carbon dioxide will pass through RO membranes, and this gas is typically removed post RO.

RE: De-aerated Water as Potable Water

Water without dissolved oxygen tastes weird. You can test this yourself by boiling some water to de-aerate it, then cooling it and drinking it. A faucet aerator might be enough to re-aerate enough so the taste is normal.

RE: De-aerated Water as Potable Water

Saturation of oxygen is obtained from the oxygen in the atmosphere, in a storage tank for example. In fresh water, dissolved oxygen reaches 14.6 mg/L at 0 ° C and 8.3 mg/L at 25 ° C at atmospheric pressure.

Complaints regarding taste are normally associated with anaerobic conditions that cause reduction of nitrate to nitrite, sulfate reduction to sulfide. This elements will not be present in significant quantities in RO water.

RE: De-aerated Water as Potable Water

If the potable water is to be used for human consumption, it needs to be disinfected. If it is to be used for fire suppression, you should also likely disinfect it so any concerns with MIC (Microbriologically Influenced Corrrosion) can be minimized.

RE: De-aerated Water as Potable Water

Just take your de-aerated water to laboratorium. And then check it with the potable water parameter standard.

By the way.. I think no one will drink that de-aerated water because the taste will be really weird (Sometimes bitter)

Visit my Website : www.on-water.us

RE: De-aerated Water as Potable Water

there is no issue with low DO level in drinking water, but be sure that their should not be anaerobic bacterial growth in potable water.

Krunal Bhosale
All about Water and Wastewater Treatment

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