Unchecked overuse is draining and damaging aquifers nationwide, a data investigation by the New York Times revealed, threatening millions of people and America’s status as a food superpower.
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.
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…
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.
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.
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.
[…] 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.
Yes, which both cost many orders of magnitude more than water right now. If water was dollars per gallon like fuel is, we’d be in an extremely bad spot for livability.
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
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.
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.
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.
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?
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.
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?
Desalination does not require fossil fuels. It requires energy. Of which there are many forms. Some of those forms are renewable. It’s not an emergency measure. Desalination happens regularly, right now, today. Read a book.
We could desalinate ocean water with renewable energy. But that doesn’t help the idiots who think they are entitled to live in Arizona / the desert.
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?
You have thousands of kilometres of coast; if you don’t dessalinate it’s because you don’t want to.
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.
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…
Very good to know. Thank you for the updated education.
It generates all the waste associated with the electricity it uses, which is often from coal fired power plants…
Considering the area a desalination plant requires, fitting it with wind and solar would not pose a challenge.
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.
and how much fossil fuel does Israel use to achieve this?
I think they went nuclear on their power grifld.
that’s better than coal for sure
No argument on that
Thanks, ChatGPT
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.
Okay fair, just flagged my brain for the repeated phrase at the beginning and end
When I re-read it after your comment, I could see why you thought that!
Would actually be kinda cool if the prevalence of chatgpt forced everyone to write in a more varied and interesting style to dodge the accusations :)
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.
Just like oil and natural gas?
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.
Yes, which both cost many orders of magnitude more than water right now. If water was dollars per gallon like fuel is, we’d be in an extremely bad spot for livability.
deleted by creator
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
deleted by creator
absolutely. most water systems are relatively efficient due to gravity doing most of the work but desal removes that advantage
Hear me out: we move people under sealevel.
It’s not that hard.
It isn’t profitable. And so nestle won’t do it until it is.
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.
https://calmatters.org/environment/2022/10/desalination-plants-california/
They are building them.
Thank you!
America actually does do desalination in several locations along the California coast and is expanding.
A good start.
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.
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.
so you agree with me? it’s not simple. it’s not just because “you don’t want to”. desalinization is extremely technically challenging.
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.
This is true and we already do it. Fresh water is distributed over huge distances using high pressure and volume. The infrastructure already exists.
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.
And what do we do with all the salt?
Put it on fried potato
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?
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.
Reprocess it for minerals harvesting, like lithium, or just evaporate it and keep the salt, which by itself is a resource for chemical industry.
If it were that easy then it wouldn’t be an issue.
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?
Desalination produces a massive pull on using more fossil fuels. It’s an emergency procedure. Not an end goal. Read a book.
Desalination does not require fossil fuels. It requires energy. Of which there are many forms. Some of those forms are renewable. It’s not an emergency measure. Desalination happens regularly, right now, today. Read a book.
We could desalinate ocean water with renewable energy. But that doesn’t help the idiots who think they are entitled to live in Arizona / the desert.
People can move.
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?