• qyron
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      1 year ago

      You have thousands of kilometres of coast; if you don’t dessalinate it’s because you don’t want to.

      • Burn_The_Right@lemmy.world
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        1 year ago

        So far, desalination has not been a useful solution to the problem. Companies have been trying to create useful desalination plants for decades. The current process is expensive, inefficient, slow and creates toxic residuals. For these reasons, the current technology does not scale up very well at all.

        • soEZ@lemmy.world
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          1 year ago

          This a really bad take. Seawater deal with RO is a marvel of efficiency, only 2-3 times above the thermodynamic limit of demixing water from salt. It does not really generate toxic waste like coal fired power plants, but does produce lots of brine with various organics (antiscalants, surfactants etc.) that are not that great. The key issue is water is very cheap from traditional sources (surface water and groundwater) and requires rather crude treatment to be usable, resulting in very low cost. Hence why desal is used in areas where they have no choice. If you don’t have surface/ground water source or brackish water source you are doing seawater deal or leave the area…not many choices. At least RO is electrified so it can use renewables but that does not really solve the much higher cost…or issue of brine generation, with zld have a set of it’s own issues costs…

          • grue@lemmy.ml
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            1 year ago

            It does not really generate toxic waste like coal fired power plants

            It generates all the waste associated with the electricity it uses, which is often from coal fired power plants…

            • qyron
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              1 year ago

              Considering the area a desalination plant requires, fitting it with wind and solar would not pose a challenge.

              • grue@lemmy.ml
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                1 year ago

                By the same argument, replacing the coal fired power plant with wind and solar wouldn’t pose a challenge either.

                The point is, you’ve got to compare apples to apples: either coal power vs. desalinization powered by coal, or renewables vs. desalinization powered by renewables. In every case, the pollution produced by the desalinization process (i.e., the brine etc.) is simply added to the pollution produced by whatever means was used to generate the power for it, which means @soEZ’s attempt to compare desalinization to power generation doesn’t make much sense.

                • qyron
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                  1 year ago

                  A coal burning plant has a comparisable smaller base of implantation; deactivating the coal plant to have it replaced by a solar or a wind (if even possible) would hardly output the same energy.

                  By comparison, a desalination plant takes a large area, by the shore, where wind and solar are plentiful, so it can be fitted with such energy source from the start.

                  The brines can and should be channeled to harvest the salts in it. The salt is raw matter for chemical industry.

                  It’s amazing how quick we are to find problems to a promising solution but the moment extracting water from surface or underground sources becomes impossible or unfeaseable we will resort to those solutions.

                  • money_loo@lemmy.world
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                    1 year ago

                    No, you’re just clearly too stupid in history and geology to know that when the groundwater runs out, so does tomorrow. /S

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          1 year ago

          With enough demand, enough money for R&D will show up to improve the technology.

          But regardless the current costs, that did not stop Israel to source all their water from the sea from very early, as well as other countries have for regions where there isn’t enough drinking water available.

          In my country, it’s used to supply our islands territories and even by some hotels for pool water.

          And the problem with the brine has me scratching my head, as I’ve read sources where the process required chemical treatment of the water and others where it’s stated the process is entirely physical.

          • Burn_The_Right@lemmy.world
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            1 year ago

            I am not using any form of AI or other assistance. I am just old and have a lot of experience writing. Have a look at my post history to see the consistency in my writing style, even when I’m ripping a conservative apart.

            I realize I copy/pasted my last line to the beginning instead of cut/paste, so it looks absurd now that I look at it again. I will fix that now.

      • doggle@lemmy.dbzer0.com
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        1 year ago

        America does desalinate in it’s coastal regions. Increasing desalination is prohibitively expensive. Shipping water inland is preposterously expensive. Even if you spend the money, scaling up takes years or even decades.

        There are reasons America, like nearly all other nations, gets a relatively small amount of it’s fresh water from desalination.

        • qyron
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          1 year ago

          […] Increasing desalination is prohibitively expensive. Shipping water inland is preposterously expensive. Even if you spend the money, scaling up takes years or even decades.

          Just like oil and natural gas?

          There are reasons America, like nearly all other nations, gets a relatively small amount of it’s fresh water from desalination.

          The way desertification is advancing in California (there must be other places facing the same problem) there will be a tipping point where mass scale desalination will be implemented.

          • Chaotic Entropy@feddit.uk
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            1 year ago

            Orrr… a tipping point where the human population becomes wholly unsustainable and starts to tear itself apart in “The Water Wars”, as they’ll be called.

        • Wogi@lemmy.world
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          1 year ago

          It’s not that hard.

          It isn’t profitable. And so nestle won’t do it until it is.

        • jcit878@lemmy.world
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          1 year ago

          Desal itself isnt really that hard, its very similar tech to regular wastewater treatment. What it is though is energy intensive, because the desalinated water starts its life at the lowest altitude and must be pumped up network to be gravity fed like regular water sources. very energy intensive

        • qyron
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          1 year ago

          Here is the rationale:

          a) factories create wealth

          b) [in order to create wealth] factories create jobs

          c) jobs return taxes

          d) taxes return money

          e) money can be returned to factories to hold it in place

          For water extraction, we only need to add a line where we state water is replenishable, another stating that is easy and cheap to extract and a third where we expand on how water is a good in constant demand, thus, easily marketable.

          Desalination is not a question of “if” it should be established but a “when” one.

      • PetDinosaurs@lemmy.world
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        1 year ago

        Like everything in life, it’s not that simple.

        One thing that is simple, however, is googling the answer to this question before making an uninformed response.

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          1 year ago

          There is a limit for how much water consumption can be reduced, how much water can be reused and how much preserved untouched.

          It is actually a subject I actually find interesting. All the criticism put towards the technology could be as easily applied to the internal combustion engine: its inefficient, produces larges amounts of residues and is expensive to run.

          There are several large scale operations already in place (Israel sources its water from the sea, as well as several other nations where drinking water is scarce) and even hotels use it to source water for swimming pools.

          There is, of course, the problem of distribution but we’ve already invented pipelines, haven’t we? And a water pipeline bursting could cause floods but no great concern lasting environmental damage, unlike oil or liquified natural gas.

          • PetDinosaurs@lemmy.world
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            1 year ago

            so you agree with me? it’s not simple. it’s not just because “you don’t want to”. desalinization is extremely technically challenging.

            • qyron
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              1 year ago

              All the criticism put towards the technology could be as easily applied to the internal combustion engine: its inefficient, produces larges amounts of residues and is expensive to run.

              This was an attempt at being sarcastic.

              If we’re running a technology by all means obsolete (internal combustion engine) and do it overlooking its drawbacks running current technology for dessalination can very well follow the same reasoning.

              I read a good deal of criticism towards dessalination regarding the disposal of the brine. That is a fair point but those brines could very well be reprocessed for minerals harvesting including lithium, which has great demand. Even by just harvesting the salt, we’d be getting an important resource.

              There is, of course, the problem of distribution but we’ve already invented pipelines, haven’t we?

              This is true and we already do it. Fresh water is distributed over huge distances using high pressure and volume. The infrastructure already exists.

              And a water pipeline bursting could cause floods but no great concern lasting environmental damage, unlike oil or liquified natural gas.

              I’ve lived where this happened once and it was not pretty. A low point of high density residencial area got flooded. Water reached somewhere around 80cm high. Damage to cars and ground stories, water distribution interrupted for 3 days. But no lasting damage.

        • reallynotnick@lemmy.world
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          1 year ago

          I’m going to be dense as I have no knowledge in this area, but can you just put it back in the ocean? I assume with sea levels rising the ocean is getting less salty so it wouldn’t be harmful as long as we spread it out/did it slowly?

          • Cethin@lemmy.zip
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            1 year ago

            Yes, but how it’s done is hard and expensive. If you just pump it into one spot you kill everything around with high salt concentrations. You can pump it far out to sea and disperse it over a large area, but that requires pipes going out to sea. The pipes would probably be made of metal, which salt water and metal don’t mix well, not to mention the brine in the pipe. You also need pumping stations along the pipe because it can’t perpetually slope down, and if it goes below sea level it needs to be pumped out.

            Basically, it’s complicated and expensive and not as easy as just dumping it into the ocean.

            • qyron
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              1 year ago

              Reprocess it for minerals harvesting, like lithium, or just evaporate it and keep the salt, which by itself is a resource for chemical industry.

                • qyron
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                  1 year ago

                  I made that same observation some time back and the answer I got was: money.

                  Why spend the money to develop a technology to harvest a mineral from the sea with probably minimal to no impact to the environment when you can simply use already existing tech and just open a hole in the ground?

      • Smoogs@lemmy.world
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        1 year ago

        Desalination produces a massive pull on using more fossil fuels. It’s an emergency procedure. Not an end goal. Read a book.

        • qyron
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          1 year ago

          Well, put me in a red dress and pony tails and call me Shirley…

          Haven’t we discovered other ways to harvest energy besides fossil fuels? Perhaps wind a solar might be an answer to that problem?

          My own country is in the process of converting a former refinery into a green hydrogen plant and part of the conversion goes into installing a few gigawatts of power in solar and wind.

          Couldn’t this same solution be used for desalination?

      • SheeEttin@lemmy.world
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        1 year ago

        It takes hundreds of years for groundwater to replenish. We are experiencing problems right now.

        • money_loo@lemmy.world
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          1 year ago

          Sure, I never said anything about that, only commenting against the hyperbole that there will be “no tomorrow” when places run out.

          There will still be tomorrows, people will just move elsewhere like they’ve done for thousands of years.

          • CitizenKong@lemmy.world
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            1 year ago

            Problem is, there will be less and less elsewheres where people can still live within a hundred years or so.

          • LotrOrc@lemmy.world
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            1 year ago

            Where you gonna move when people already live there and those areas are low too?

          • Smoogs@lemmy.world
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            1 year ago

            Thousands of years ago didn’t have desalination nor electricity… there’s a reason why they moved to fresh water inland.and before you jump there: desalination requires a fuck load of electricity that impacts with other issues.

            Read a book.

      • grue@lemmy.ml
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        1 year ago

        …says the guy who clearly doesn’t understand the geologic water cycle.

        • money_loo@lemmy.world
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          1 year ago

          Sir?

          I see you posting and I’m still waiting for your proof or reasoning behind thinking there will be no tomorrow when some places lose ground water.

          You guys are all smug af with your downvotes, but got absolutely nothing for facts beyond your provocative hyperbole.

          Keep in mind I never said losing ground water wouldn’t suck and/or be catastrophic, only looking for some proof it will be “the end of tomorrow” as the upvoted dude with his provocative words stated so definitively.

          I keep getting told to read a book or that I know nothing of history or geology, yet all of human history proves me fucking right so far, so I’ma need literally any scrap of evidence from fucking anyone who has something better than a shitty opinion alongside some clicks of a down arrow.