Technology

59357 readers

5248 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

[email protected]

551

Desalination system could produce freshwater that is cheaper than tap water (news.mit.edu)

submitted 1 year ago by [email protected] to c/[email protected]

162 comments fedilink hide all child comments

Engineers at MIT and in China are aiming to turn seawater into drinking water with a completely passive device that is inspired by the ocean, and powered by the sun.

In a paper appearing today in the journal Joule, the team outlines the design for a new solar desalination system that takes in saltwater and heats it with natural sunlight.

The researchers estimate that if the system is scaled up to the size of a small suitcase, it could produce about 4 to 6 liters of drinking water per hour and last several years before requiring replacement parts. At this scale and performance, the system could produce drinking water at a rate and price that is cheaper than tap water.

https://www.cell.com/joule/fulltext/S2542-4351(23)00360-4

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 10 points 1 year ago (2 children)

This circulation, combined with the sun’s heat, drives water to evaporate, leaving salt behind. The resulting water vapor can then be condensed and collected as pure, drinkable water.

This is not a chemical desalination. It's a classic solar distiller. The output is distilled water. You actually want to cut it with a bit of seawater, because drinking distilled water pulls salts and minerals out of you, and then you die.

[–] [email protected] 12 points 1 year ago

Drinking distilled water is actually not that dangerous, so long as you get salts some other way (food!). In order for distilled water to cause runaway deplasmolytic processes, you'd need to spend a lot of time only drinking that, afair from high school bio.

[–] [email protected] 7 points 1 year ago (1 children)

I mean you die if you only drink distilled water and never consume anything else, but the same is still true of mineral water

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

I was unclear - that's exactly what I meant. I was thinking of a suitcase-sized still being used in an emergency or survival scenario, for a time anything other than "very short term."