The plant will generate about 880,000 kilowatt hours of electricity per year—enough to help run a nearby desalination facility and supply around 220 homes. That equals the output of two soccer fields of solar panels, but osmotic power keeps running day and night, in any weather.
This seems like a terrible use, since these plants work by mixing fresh water with seawater (or in this case the brine leftover from desalination). I guess the catch is they can use treated wastewater instead of potable water.
This method gains very little net energy compared to other renewables.
“While energy is released when the salt water is mixed with fresh water, a lot of energy is lost in pumping the two streams into the power plant and from the frictional loss across the membranes. This means that the net energy that can be gained is small,” said Kentish.
Because osmotic power has enormous potential in the sense that millions of cubic meters of fresh water is running into oceans all over the world every minute. If we're able to get even a low-efficiency method of using the salinity gradient to generate power working then every place a river meets the sea is essentially an unlimited (albeit low-yield) power source.
This is tech that doesn't rely on elevation (like hydropower) or weather conditions (like wind/solar) it's stable and in principle possible to set up at pretty much any river outlet, which is great!
Oh absolutely. As with all other infrastructure, there is a cost to be paid. However, when you look at an average to small river, even routing 10 % of the water via an osmosis plant before passing it to the sea is an absolutely massive volume. There's also the point that you don't want to build these things in large, meandering, flat river deltas. You want a large salinity gradient, which means relatively small, fast-running fresh water meeting the ocean more "suddenly" than what you get in a classical river delta is the optimal source here.
Returning to this thread long after everyone has moved on.
How do you get enough net energy out of mixing brine from desalination with fresh water to use to separate saltwater into brine and fresh water? Especially when the energy producing method is already known to have poor efficiency?
This seems like this is just terrible at converting treated wastewater into drinking water. Must have something to do with government subsidies instead.
In my part of the EU this year, we had very very many days of negative sale prices and having to curtail wind parks because just solar and wind were making up more than demand during the day. Afaik we only curtailed at night one time.
Source: wrote curtailment algorithms for wind turbines
Do you go to bed at sunset? Do you turn off your heat at sunset in the winter? Maybe you do, but most people don't.
Also, most people with an electric car and a garage to park it can just use a cheap Level 1 charger to trickle charge it whenever it's in the garage and always have plenty of range for their commute and errands. This means all of those cars are charging. .... at night while the owner sleeps.
It sounds like they're not quite using fresh water, but waste water. I presume it's been treated, but even if it's not 100% back to potable, if this also helps solve the problem of what to do with the brine after desalination, I think it's a win all around.
(salty water + unpotable fresh water) → (salty water + potable fresh water + energy)
...with a few steps in between. Even if most of the power is used in running the plant, you end up with potable fresh water and no brine being dumped into the ocean, which is a net win.
Aside from obvious confusion of running a water desalination plant by salinating water, there's one more concern: outside of such installations, don't we have quite a limited supply of fresh water? Sure, saltwater is everywhere, but fresh water is relatively scarce.
Another thought: what if we would instead use concentrated brine from desalination plant and seawater? Yes, power will be lower, but this way we don't use fresh water that we, erm, try to produce.
Desalinating water gives you potable fresh water, whereas the fresh water being used might require treatment before being potable? Or it's unreliable supply. IDK, few possible reasons, I'm just speculating
"Treated" means the solids and goo that may have been a problem has been removed. It is mostly water, a lot a fecal bacteries, and diverse dissolved chemical that wasn't removed.
I think the article author is completely confused and doesn't understand what's happening. There are hints of what's happening in this paragraph.
Fresh water—or treated wastewater—is placed on one side of a membrane. On the other side is seawater, made even saltier by concentrating leftover brine from a desalination process. The difference in saltiness pulls the fresh water across the membrane, increasing the pressure on the saltwater side. That pressure is then used to drive a turbine, generating electricity.
I don't think any fresh water is being used. I think what's actually happening is...
Very salty wastewater (from the desalinization plant) is placed on one side of a membrane. On the other side is seawater. The difference in saltiness pulls the wastewater across the membrane, increasing the pressure on the saltwater side (or maybe the other way around). That pressure is then used to drive a turbine, generating electricity. The waste then is just water that's saltier than sea water, but less salty than what came from the desalinization plant.
According to Japanese sources Mainichi, it is indeed treated waste water one one side and desalination brine on the other. Both the waste water and brine are meant to be dumped anyway, and it's also harmful to sea life to dump brine directly. Treated waste water isn't saline, so is perfect for diluting the brine. Might as well get some free power out of it.
Lots of places treat their wastewater and then discharge it. For example, where I live, wastewater, that is to say, sewage which has had solids filtered out, is still rather pooey and pissy but not salty, gets treated (I don't know how) and is then injected into natural underground aquifers where it eventually percolates out to bores or springs where it's collected and used for irrigation, contributes to natural springs, or possibly even winds up in a drinking water catchment.
All wastewater, regardless what happens to it, has to be treated before release. If it's still 99.9% fresh, then why not use it to create osmotic pressure before dumping it.
It really depends. Osmosis is a chemical process, so if the source of the radiation would be filtered, then it would remove the radioactive component. If the water is made with radioactive isotopes of hydrogen and oxygen, it would just flow through.
But the desalination process is powered by the energy manufacturing, the water is not shared between them. I was more thinking about the safety and capability of the energy manufacturing, as fallout makes other systems much more difficult.
Well, yes, dumping irradiated water into the ocean was always an option. So long as the power-generating components aren't the same as the desalination components, you're good as far as the potable water is concerned. This isn't much of a solution for the irradiated water, though, any more than just dumping it into the ocean was in the first place.
B2B marketing faces a data revolution. With 83% of marketers adopting advanced analytics, the competitive landscape shifts. Embrace predictive insights to drive growth.
Every generation. For me it's folks who have put in ear buds and detached from meatspace.
But I'm very wary of anything that seems like "generation gap" thinking. As long as capital can keep the races and nations and sexes and generations fighting we can't work together to start the guillotines rolling. #eatherich
A giant thank you to Master of Wine Joel Butler for his ringing endorsement of my life's work! Re my Substack page "photography with feeling," rcaparoso.substack.com.
The photo log of a career wine professional who once took photos out of necessity, but now does it with unbridled passion. Click to read photography with feeling, by Randy Caparoso, a Substack publication with hundreds of subscribers.
A customer-centric organization structure cannot remain static; it must evolve alongside shifting expectations, emerging technologies, and competitive pressures.
The video showcases the engine bay of a car, with the hood open, revealing a well-maintained engine with various components such as the air intake, spark plugs, and hoses. The engine is predominantly metallic with black and blue accents, and the surrounding area is clean and organized. The car is parked on a gravel surface with grass visible in the background. Initially, the engine is stationary, but as the video progresses, smoke begins to emanate from the engine, indicating it has been started. The smoke gradually increases, filling the engine bay and spreading into the surrounding area. The camera angle shifts slightly, providing a broader view of the engine and the car's surroundings, including a glimpse of the road and the car's battery. The video concludes with the smoke still present, suggesting the engine is running.
Provided by @altbot, generated privately and locally using Ovis2-8B
Last night the universe put a track from this album in my ears and I realized I hadn't actually listened to this album before so I bookmarked it to listen to later and then put on our next episode of Anthony Bourdain's Parts Unknown...and the episode turned out to be the Chicago one with Steve Albini, no joke. And now I'm finally listening to the album and, like, holy shit. Some things don't suck.
Kakhi Solomnishvili conducts the Buenos Aires Philharmonic Orchestra playing:
MAHLER: Symphony No. 9.
Live.
Get valid XHTML YouTube embed code for your website...
Americans scream tyranny is wonderful, but Americans are unable to explain why Cubans try to escape even though Cuba has gun control and free medical care.
While the street market was busy and many tourists strolled the Grassmarket, some others decided that it was time to take a wee seat and have a break on a very hot, sunny afternoon
#Epstein , Epstein, Epstein. My daily reminder. Quid pro quo. Club Fed. "They were predators together, they molested kids together." -Prosecutor. Leniency implies GUILT! #Politics
@histodons I don't know whether you would call "Matewan" overlooked, but it's always at the top of my list of movies about labor relations and organizing, with "Eight Men Out" not far behind.
My frustrations in trying to find a small stuffed animal to clip to the backpack I use every day at school means I ended up buying a cheaper knockoff #Labubu from the vape shop. It is actually a nice light color which softens my backpack a bit and kind of cute so I'm glad I did, but just funny how much labubus and copies have spread.
In July 2021, a sudden drop in Tor usage in Turkmenistan called our attention. Tor would come to understand that this marked the beginning of a new era of censorship and restriction in this post-Soviet country. But let's rewind...
Over the years, the Tor Project has called for action to run more bridges, Snowflake proxies, while we've investigated and adapted our anti-censorship strategies, and shared information about online censorship in Turkmenistan.
Modern censorship circumvention systems are generally built around the concept of "collateral damage", where a censor cannot block access without blocking the entire internet or popular online services. However, in Turkmenistan, the censors' behavior has been strikingly different. They have openly blocked vast parts of the internet without concern for the collateral consequences, sparking curiosity: why do Turkmenistan's censors seem unbothered by the collateral damage their actions cause?
Donald Trump may be running an authoritarian political project, but the big money that has been backing him has been running a cryptocurrency project at the expense of the dollar and your standard of living.
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Guardo il mare gonfiarsi per il vento di maestrale e mi chiedo quale pesce sia così pazzo da avventurarsi fuori dalla sua tana e affrontare tutto questo.
0 likes, 0 comments - ma_mo_adventuresontheshelf on August 30, 2025: "🐟
Guardo il mare gonfiarsi per il vento di maestrale e mi chiedo quale pesce sia così pazzo da avventurarsi fuori dalla sua tana e affrontare tutto questo.
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Das ging sehr schnell, gestern habe ich bei Etsy einen Kalender bestellt und der wurde vor knapp 2 Stunden geliefert. Es ist nicht irgendein Kalender, es ist der neue Balkonhörnchen-Kalender.
Arbeitsministerin Bas für weitere Nullrunde beim Bürgergeld
Nach der Nullrunde in diesem Jahr wird das Bürgergeld auch im kommenden Jahr wohl nicht erhöht. Das geht aus Plänen von Arbeitsministerin Bas hervor. Die SPD-Politikerin kündigte auch härtere Sanktionen an.
Schamlose Selbstbedienungsmentalität, moralisch verlottert und selbstgerecht: Menschen, die sich unter Berufung auf gestiegene Kosten selber eine Diätenerhöhung genehmigen, die höher ist als das monatliche Bürgergeld, entscheiden, dass die Ärmsten ohne Inflationsausgleich über die Runden kommen müssen. Meine Verachtung kommt aus allertiefstem Herzen.
Wie ist so etwas überhaupt zulässig. Inflationsbedingte Preissteigerungen müssen doch in der Fortschreibung berücksichtigt werden, damit keine existenzgefährdende Unterdeckung entsteht. Die Inflation bei Lebensmitteln, ist weiterhin deutlich über der allgemeinen Inflationsrate von 2%, und muss daher bei den tatsächlichen Lebenshaltungskosten stärker berücksichtigt werden. Die tatsächliche inflationsbedingt Preissteigerung dürfte eher bei 6% liegen für dieses und nächstes Jahr (2*3%)
Die SPD reiht sich damit ein die Reihe der Ausbeuter, die Bei den Armen sparen, Normalverdiener die Steuerladt tragen lassen und lächelnd die Reichen entlasten! WTF!
Alle #Bürgergeld-Beträge liegen damit weit unter der europaweit üblichen Armutsgefährdungsschwelle. Diese lag 2024 für Singles bei 1.381 € monatlich. Der durchschnittliche Bürgergeld-Bezug unterschreitet diese Marke um mehr als 300 Euro. Trotzdem kündigte die Union um #CDU und #CSU sogar weitere Kürzungen fr.de/wirtschaft/buergergeld-s… #Armenhass
Ab Juli bekommen die Bundestagsabgeordneten wieder mehr Geld. Das Parlament bestätigte die geltende Regelung, wonach die Diäten automatisch einmal pro Jahr angehoben werden. Warum diese Erhöhung umstritten ist.
Ab Juli bekommen die Bundestagsabgeordneten wieder mehr Geld. Das Parlament bestätigte die geltende Regelung, wonach die Diäten automatisch einmal pro Jahr angehoben werden. Warum diese Erhöhung umstritten ist.
Und mit dem was die Bürgergeldempfänger*innen dadurch WENIGER im Geldbeutel haben, werden die ganz sicher das Wirtschaftswachstum ordentlich ankurbeln, damit das BIP steigt und wieder mehr Firmen Leute einstellen. 😏
Listening to this interview of Rudy from #blacksky, I get the impression that there is no simplifying decentralization. You can either do it on the frontend like #mastodon does, or ask/expect people to decentralize later like #bluesky does. Either way, you will need to explain why it matters and help them make it happen.
[I'm unconvinced by arguments beyond #DemocracyOfReach so far. We don't need "decentralized social media" for community. Start a subreddit/discord.]
Verizon has confirmed to customers in stores and online that its network is having an issue on Saturday. Many people have been unable to connect and make or receive calls for hours, while DownDetector’s tracker peaked in the afternoon at around 3:30PM ET with more than 20,000 reports. Some customers report their service has continued to function throughout the day, so it’s unclear what the cause is exactly.
Downdetector’s outage map showed hotspots in many cities, and Verizon didn’t specifically list affected areas. On X, the @VerizonSupport account confirmed the issue in response to customers’ questions, but didn’t have additional details on restoration or how widespread it is
It's the time of year when one starts to think about #distrohopping again.
I've been using #Manjaro for years as my #Linux distro of choice and I'm toying with the idea of moving to #CachyOS.
This is for desktop use only, my servers are all running #BSD anyway.
My home directories are on a separate partition anyway, so it's not like it's a ton of effort to change distros as long as I remember to re-create the cron jobs.
Has anyone made that jump and was it an (unspecified) improvement?
I jump from linux mint to debian couple of months ago, it was more of a jump back, I used #debian between 2004 to 2006 heavily after that for a while I was using ubuntu/xubuntu then long time mint, it was really nice, but I missed debian I am back, feels like home, mint and ubuntu was having too many updates everyday, it is more quite in debian. And #Cinnamon is a bliss, I like gnome and kde, used them long time but they have been heavy always, I also like Xfce or Windowmaker too but cinnamon is more like stable and user friendly.
@thejvmbender I do use Linux Mint for a regular "daily driver" type Linux - basically as a direct Windows replacement. The machine where I was distrohopping today is more of a development workstation so I do want pretty up to date packages (hence my usage of Manjaro).
I ended up with #opensuse Tumbleweed, which is probably halfway between the Arch-type bleeding edge and the stable distros like Debian and Debian-based ones.
I usually use Xfce or Enlighenment as the desktop and they work well on both OpenSUSE and Manjaro.
Ten years ago, my friend Rik Wanninkhof's son, Patrick, was killed while cycling across the US doing charity work for Habitat for Humanity. The woman who killed him was using her mobile phone. She was also a nurse, like the woman in the video. Rik is still devastated. Don't text and drive.
On Tuesday, students enrolled in the Southwest Oklahoma Driving School heard from a woman, convicted in the death of a bicyclist, about the dangers of distracted driving.
AI chatbots are blowing up the 30-year economic relationship publishers have had with search engines. Many think this will kill the web if not addressed. Google needs to change first. It's resisting.
I wonder what’s with the #Luanti forums recently, being super slow and unresponsive and oftentimes just returning a gateway timeout (if returning anything at all).
The rabid amount of Linux fanboyism on Lemmy is quite off putting in general. Any conversation about Microsoft gets brigaded with “Just use Linux!” even if the conversation has nothing to do with it. It makes it a pain to have any decent discourse about things.
Think people who got on lemmy originally lean techy (and thus more likely to use linux and be passionate about it), and people who joined after the IPO thing have more diverse reasons for abandoning reddit.
I am a professional designer with two decades of experience and I gotta admit, you're smoking crack if you think GIMP (the project that is almost entirely held back by its stupid name) is superior to Photoshop.
It might be able to get the job done for small tasks, but it is not a serious tool for serious people. I'm sorry. I'm as pro-FLOSS as anyone can get, and even I recognize that right now there's just no competition in the design department. Affinity is Mac-only, and comes with its own problematic aspects.
Except it really isn't, unfortunately. As someone who fucking hates adobe and Photoshop, GIMP falls far short. Photoshop is made to work as part of a toolkit, and GIMP isn't interested in any form of compatibility. Take, for example, an issue that's been around (and in the bug tracker) since the release of 2.10. Something about the way GIMP handles colors means that most programs can't use alpha channels output by GIMP correctly, and see it as having much higher contrast than it's meant to. The stance seems to be that this is intended behavior. However, this is clearly not the case, as even when only using GIMP, re-importing the image shows that, even though the contrast is correct, data was still lost.
Show me an OSS alternative to Excel that actually does tables, one of the most used, basic functions in excel.
I use tables every day for things like:I have a list of movies, sort them by producer. Or by production date. Or main actor. All these require a a single click on a column, something Open Office devs refuse to ever implement.
I use Linux every day for my servers, but not as my desktop. There's too much stuff like this that I don't have time for.
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agree 100% on gimp. It took me about a year to get used to it and now I have a free license for photoshop at work, but I still prefer gimp 2.8 on my work computer with windows. At home I use Gimp on linux all day nearly every day and do texture editing for games all of the time. Very productive tool.
I think its mostly sunk cost and "i dont want to invest time to learn new things" that keeps people on windows.
Work is a separate thing. My work laptop runs windows, a matter I dont have a say in. But for personal use cases? I feel there are exceptionally few that are more than "i have to change the programs I use and learn how new ones work". And if that's too major a barrier for someone to overcome, good for them. The least they can do is say "I dont want to use Linux because its too much effort".
To a lot of people it's difficult. Vendor lock-in, support, cartels (the old kind) and familiarity are very important factors in choosing what you're going to use to compute things.
We should embrace the new ones and build things that they are going to use.
There are legitimate reasons not to use Linux, but the user interface is not one of them, Linux can be way friendlier UI-wise than windows, see Desktops like cinnamon.
The only issue I have with my Index is that linux somehow prioritizes it over my main monitor when booting so i have to plug it in after booting and then all works fine.
Yeah, linux can be almost anything you want it to be. It'll run faster and look and feel just the same as windows, if not better. The only bad thing, and I say this as someone who's still on windows and will switch soon^tm^, is that there's a lot of work that comes with that.
A friend of mine who's all about linux is always fixing something about his installation. Though from what I know, he's using Arch, which apparently is less stable/needs more work to get going (something about bleeding edge).
Only reason why I haven't changed yet is because of VR and adobe programs. As soon as VR is a bit more seamless and I get replacements for adobe I'm off of windows.
WiVRn from quest app store, wivrn desktop app. I also needed xrizer nightly for secondary gun mode to work in half life alyx. Can't guarantee much else though since I only really play beat saber.
Yeah same for me with my rift cv1 the current driver altough better than before is still pretty bad in comparison to windows like 50fps at best and with other drivers it gets 28 fps.
What Linux are you using? I wanted to do the switch soon to either zorin or buzzite, but I would also like to keep using my valve index. Reading this here makes me reluctant to complete the switch.
I am using opensuse but it is hard to build monado or openhmd with it necause some packages you need to get from fedora because they dont exist or have a version tag with _SUSE which makes it not see that the package is there. I would recommend something more mainstream: Arch, fedora, debian and etc. But bazzite should work I think I succeefully ran my rift on it for a little bit.
If you truly believe a Mac is locked down more than North Korea you need to do some research. And I pray you never find out how locked down North Korea is first hand.
I didn't say that I did. Please don't put words into my mouth.
There’s a million billion reasons to knock MacOS, but saying it’s too locked down in a thread about Linux is wild. They’re both Unix based OSes. They’re siblings. If you’re comfortable enough with a command line to terminal your way through managing Linux then you’re capable enough to terminal your way through MacOS and get it to do anything you could get Linux to do.
And I hope you're not dumb enough to stay on 10 after end of support. The 0-day fallout for the Nintendo 3DS was pretty big, people had been sitting on exploits for months waiting for the final EOL patch to drop. For a higher-value target like Windows 10? It's gonna be terrifying. Get "Windows 11 IoT Enterprise LTSC 2024" from the mass grave if Windows is the only OS that works for you - it has lower hardware requirements and significantly less crapware. But don't stay on 10 past EOL.
Microsoft owns GitHub, which hosts mass graves. If they wanted people to stop using Windows and Office for free, they could make that happen by flipping a few switches. Given a choice between "pirating" Microsoft products and using an alternative, Microsoft wants you to use their stuff for free. Anything but give Linux any oxygen.
It's Microsoft's own activation mechanism, not some backdoor crack. The point is they know full well it exists and are doing nothing to curb it, because they don't want FOSS picking up steam. Microsoft doesn't make their money off consumers. They make their money off enterprises that don't view Linux environments as feasible because all their workers have ever known is Windows.
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Ah. The fuck key. That's the one that most had it's rounds imo. Good memories. Even though I had a legit windows for free back then thanks to my student account.
Doesn't windows eventually shut down every hour when you don't activate it? Or is that just their shitty development VM that does that so I have to reinstall it every 30 days?
i think the only things these days for 'unactivated windows' (home, pro editions) is inability to 'customize the desktop' (change wallpaper, theme...) and occasional activation nags.
it doesn't quit working or shutdown (iirc enterprise or server trials do that after they expire, though) or quit getting updates or anything like that.
I highly doubt they can't stop it and slightly suspect they don't want to. You can install any version of Windows (even enterprise), use MASgrave, wipe the whole thing, reinstall it, and it'll pass online activation as genuine. There's just no way that's an accident.
sbv
in reply to floofloof • • •like this
Maeve likes this.
AmidFuror
in reply to sbv • • •This seems like a terrible use, since these plants work by mixing fresh water with seawater (or in this case the brine leftover from desalination). I guess the catch is they can use treated wastewater instead of potable water.
This method gains very little net energy compared to other renewables.
like this
Maeve likes this.
underline960
in reply to AmidFuror • • •Why do it, then?
Is this a proof of concept/MVP build, so they can iterate more efficient versions? A vanity project? A mistake?
like this
Maeve likes this.
thebestaquaman
in reply to underline960 • • •Because osmotic power has enormous potential in the sense that millions of cubic meters of fresh water is running into oceans all over the world every minute. If we're able to get even a low-efficiency method of using the salinity gradient to generate power working then every place a river meets the sea is essentially an unlimited (albeit low-yield) power source.
This is tech that doesn't rely on elevation (like hydropower) or weather conditions (like wind/solar) it's stable and in principle possible to set up at pretty much any river outlet, which is great!
tyler
in reply to thebestaquaman • • •BowtiesAreCool
in reply to tyler • • •thebestaquaman
in reply to tyler • • •GreyEyedGhost
in reply to underline960 • • •AmidFuror
in reply to AmidFuror • • •Returning to this thread long after everyone has moved on.
How do you get enough net energy out of mixing brine from desalination with fresh water to use to separate saltwater into brine and fresh water? Especially when the energy producing method is already known to have poor efficiency?
This seems like this is just terrible at converting treated wastewater into drinking water. Must have something to do with government subsidies instead.
sexy_peach
in reply to sbv • • •🇰 🌀 🇱 🇦 🇳 🇦 🇰 🇮
in reply to sexy_peach • • •frank
in reply to sexy_peach • • •This is a very old school and outdated mentality.
In my part of the EU this year, we had very very many days of negative sale prices and having to curtail wind parks because just solar and wind were making up more than demand during the day. Afaik we only curtailed at night one time.
Source: wrote curtailment algorithms for wind turbines
sexy_peach
in reply to frank • • •Do you mean my mentality or the one of the new technology?
It's not necessary to produce power 24/7 since demand isn't 24/7 either. Strong peaks and valleys.
frank
in reply to sexy_peach • • •sexy_peach
in reply to frank • • •frank
in reply to sexy_peach • • •At night?
We use less power at night. We generate a LOT less power at night. Because the sun is off for the most part.
Null User Object
in reply to sexy_peach • • •Do you go to bed at sunset?
Do you turn off your heat at sunset in the winter?
Maybe you do, but most people don't.
Also, most people with an electric car and a garage to park it can just use a cheap Level 1 charger to trickle charge it whenever it's in the garage and always have plenty of range for their commute and errands. This means all of those cars are charging. .... at night while the owner sleeps.
hark
in reply to sexy_peach • • •sexy_peach
in reply to hark • • •Null User Object
in reply to sexy_peach • • •shplane
in reply to sexy_peach • • •treadful
in reply to sbv • • •thann
in reply to treadful • • •like this
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frongt
in reply to thann • • •cmnybo
in reply to thann • • •like this
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A_A
in reply to floofloof • • •Technical explanation : with reverse osmosis you have :
(salty water + energy )
→ ( fresh water + highly salty water )
So, reverse this process (call it osmosis plant ?) and you get energy ... e.i. :
( fresh water + highly salty water )
→ (salty water + energy )
GreyEyedGhost
in reply to A_A • • •I think it's more like:
(salty water + unpotable fresh water)
→ (salty water + potable fresh water + energy)
...with a few steps in between. Even if most of the power is used in running the plant, you end up with potable fresh water and no brine being dumped into the ocean, which is a net win.
Allero
in reply to floofloof • • •Allero
in reply to Allero • • •AwesomeLowlander
in reply to Allero • • •Samskara
in reply to Allero • • •Allero
in reply to Samskara • • •Dremor
in reply to Allero • • •Allero
in reply to Dremor • • •melsaskca
in reply to floofloof • • •ryan213
in reply to melsaskca • • •Null User Object
in reply to floofloof • • •I think the article author is completely confused and doesn't understand what's happening. There are hints of what's happening in this paragraph.
I don't think any fresh water is being used. I think what's actually happening is...
Very salty wastewater (from the desalinization plant) is placed on one side of a membrane. On the other side is seawater. The difference in saltiness pulls the wastewater across the membrane, increasing the pressure on the saltwater side (or maybe the other way around). That pressure is then used to drive a turbine, generating electricity. The waste then is just water that's saltier than sea water, but less salty than what came from the desalinization plant.
M137
in reply to Null User Object • • •Null User Object
in reply to M137 • • •Integrate777
in reply to Null User Object • • •Japan's 1st osmotic power plant begins operating in Fukuoka - The Mainichi
The MainichiNull User Object
in reply to Integrate777 • • •Agent641
in reply to Null User Object • • •Why isn't it fresh (non-salty) wastewater?
Lots of places treat their wastewater and then discharge it. For example, where I live, wastewater, that is to say, sewage which has had solids filtered out, is still rather pooey and pissy but not salty, gets treated (I don't know how) and is then injected into natural underground aquifers where it eventually percolates out to bores or springs where it's collected and used for irrigation, contributes to natural springs, or possibly even winds up in a drinking water catchment.
All wastewater, regardless what happens to it, has to be treated before release. If it's still 99.9% fresh, then why not use it to create osmotic pressure before dumping it.
Jason2357
in reply to Null User Object • • •Tja
in reply to Jason2357 • • •fmstrat
in reply to floofloof • • •GreyEyedGhost
in reply to fmstrat • • •fmstrat
in reply to GreyEyedGhost • • •GreyEyedGhost
in reply to fmstrat • • •