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New method turns ocean water into drinking water, without waste

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Re: New method turns ocean water into drinking water, without waste

#11
post #7
post #5

Earlier quoted context omitted.

Sure, but typically desalination plants are located in a single physical place, so a discharge pipe dumping brine 24x7 is bad for all of the things around it, as the local concentration is extremely high.

Seems like you could run a long perforated tube to diminish that effect.

I liked the idea of loading it up on a ship that sails out releasing as it goes out and back. Make it solar powered or even go old school with literal sails.

Re: New method turns ocean water into drinking water, without waste

#12
post #8
post #7

Earlier quoted context omitted.

Seems like you could run a long perforated tube to diminish that effect.

And it doesn't even need to be a rigid pipe. A flexible pipe made out of, say, waterproof fabric, could be cheaply made to extend miles while remaining open due to the pressure of the water pumped into it.

Things left underwater tend to collect things on it which would make this much less porous over time.

Re: New method turns ocean water into drinking water, without waste

#13
post #7
post #5

Earlier quoted context omitted.

Sure, but typically desalination plants are located in a single physical place, so a discharge pipe dumping brine 24x7 is bad for all of the things around it, as the local concentration is extremely high.

Seems like you could run a long perforated tube to diminish that effect.

I wonder what the linear diffusion gradient would look like for that. Like the perforated garden hoses or whatever for soaking soil. Aquatic organisms grow so quick though very curious on the constraints for something like this.

Re: New method turns ocean water into drinking water, without waste

#16
post #7

Earlier quoted context omitted.

Seems like you could run a long perforated tube to diminish that effect.

I liked the idea of loading it up on a ship that sails out releasing as it goes out and back. Make it solar powered or even go old school with literal sails.

I thought they tend to pipe far out and discharge as far below the surface as possible, since there is a lot of surface life and it is less damaging this way.

Ships (with long submerged pipes) would be prone to weather events and generally less reliable than an installed pipe. Perforation would be prone to clogging from build up so a nonstarter I would expect. Adding flex tubing and a relocation robot would be a maintenance headache as well. Not sure there is an easy optimization.

Re: New method turns ocean water into drinking water, without waste

#17
post #15

> without waste ...except for the huge piles of salt. If the salt was not waste, surely people would already be extracting it from the brine and the existing methods would also be "without waste".

Persian Gulf has 20% more salt in water because of the humans which are throwing the oversalinated waste back into the sea. Dehidrated salt may be a big deal for some areas because of no waste into input.

Re: New method turns ocean water into drinking water, without waste

#18
post #3

This reads like hyperbole: > The brine byproduct wreaks havoc on sea life when it’s deposited back into the ocean by raising the salt level and lowering oxygen in the water. Managing return of concentrated brine should be entirely tractable in the literal ocean.

I mean.. we really want to permanently desalinate the ocean somewhat too so putting the brine back seems kinda stupid. Put it on land, let it dry, sell some as table salt and dump the rest into abandoned mines.

Re: New method turns ocean water into drinking water, without waste

#19
post #7

Earlier quoted context omitted.

Seems like you could run a long perforated tube to diminish that effect.

I liked the idea of loading it up on a ship that sails out releasing as it goes out and back. Make it solar powered or even go old school with literal sails.

If you want to be really clever about it, maybe the ship is powered by the brine.

https://en.wikipedia.org/wiki/Osmotic_power

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