Does Reverse Osmosis Waste Water? Understanding RO Efficiency
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- Опубликовано: 26 авг 2023
- Wasting water is one of Reverse Osmosis' biggest kept secrets. Come along with Master Water Specialist John Woodard to learn about how much water RO systems send down the drain, how the efficiency of an RO system is measured, and what features to look for in an RO system to minimize water waste.
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The best explanation I've ever heard about RO efficiency. Thanks!
Thanks for your unbiased knowledge. I've been researching softeners and ro systems for the last 5 hrs, and your video was amongst most.
We appreciate this! You are welcome.
Just want to say that this video contributed to me ordering one of your premanufactured RO systems. I recommend ordering the airgap faucet with your unit, and double check that you are getting and AIR-GAP faucet. Other than that, it's a decently easy install. You will need 9/16", 11/16" wrenches or an adjustable wrench at a minimum. They include a hefty amount of PFTE tape, thankfully.
very interesting, thank you
This really opened my eyes. In 2021 I had a new ClearFlo RO system installed. Today did an experiment. I pulled the drain line out of the drain and placed it in a bucket. Ran the faucet to withdraw various water volumes, from 1/2 gal to 1.5 gals. In each case, I got 16% efficiency. For example, when I withdrew 1 gallon, the system refilled the tank, but also flushed 5.25 gallons down the drain.
Wow... Create 1 gallon fresh water and throw 5 gallons out. That's very expensive if you in like in North California.
Very educational
I find myself in a very rare spot right now. I'm sitting with the brand new RO system I ordered, and much unlike my usual self - I 100% missed this glaring downside.
Can you recommend a whole house filtration product that meets or exceeds EPA WaterSense standards? I’m on a city water. I’m an aquarium hobbyists, so my water usage is a bit higher than a typical household. I’d like to reduce waste water production as much as possible, for both environmental and economic reasons.
how does the drain water not flow back up into the unit? what if you get a bad clog and both sinks are full causing back pressure?
Could you run two or three RO filters at once on the same system and skip the pressure tank entirely? My understanding is that the pressure tank exists to make up for the RO filter's low flow rate. Alternatively, would adding a pump into the system to create higher PSI in the RO filter increase it's efficiency and therefore flow rate?
Why do the Neo Pure only have 4 stages when most have 5 stages? And why do the Neo Pure come with a permeate pump but the five stage ones on your website do not have a permeate pump?
Definitely it wastes the same amount of watered it filtered. For every gallon I filter, it discards a way 1 gallon. I observed it. I m not sure future system can reduce amount of waste water. My system wastes with that level, not the same ratio mentioned in this video. I will check if my new system reduces waste water later weeks or months.
Hello John . I have a RO demineralized water production facility and I am worried about the lifespan of the osmotic membrane. the installation produces 250 liters per hour and they use the water to rinse the metal parts. It was put into use 10 years ago. the conductivity is maintained at 10 uS/cm. do these osmotic membranes last forever or should I be worried?
Great question. Reverse osmosis membranes do have a life span that is greatly affected by the type of water it is fed and the way the system is set up. The higher the mineral content, specifically hardness minerals such as calcium and magnesium, can drastically reduce membrane life. As water permeates through the membrane these minerals are left behind and over time scale will form on the membrane's surface especially if concentrate flow is not adequate. An ion exchange water softener in front of a reverse osmosis system will add life to the membrane by removing the scale-causing minerals. Having good pretreatment to eliminate membrane killers and a system set up to optimize membrane performance will extend life. 10 years of life is awesome. Continue to monitor performance. When rejection begins to fall, that will be a good indicator that replacement time is approaching.
@@fwstraining624 thank you ❤️❤️❤️
I bought a permeate pump to attach to my RO system in order to conserve water (water rates are increasing FAST!) but am confused as to how to install it. Watched every video I could find and they all are inconsistent, making it even more confusing. Guess I'll have to bite the bullet and hire it out... not sure about the trade off in savings.
This is very clear and highly useful. So, the evil is the pressurised storage tank.
How do we eliminate the tank and still get good water?
Don't have to eliminate it. Just put an open tank above the table and let the filter drip into it 🙂 @@ez-g3090 If you don't want to do that, they sell a "permeate pump" that pushes the water into the tank and relieves pressure on the filter side.
The best way to maintain the efficiency of the RO system is to use a non-pressurized tank with a float switch...
Is there a link?
RO water vs.4 times your water bill
It is absolutely correct as this u-tube video shows if the system is used in the way shown.
But as we use the Enwa Ro plants to produce drinking water or chemically clean water for drilling platforms or on ships or on small islands where you previously had to send the water by tanker, it happens in the following way.
We produce from an RO plant to a storage tank - where, of course, there is no back pressure.
Before it goes into the storage tank, we send the fresh water through a remineralization filter where we adjust the ph value (this is because desalinated seawater is very soft), minerals are added to the same filter.
From the storage tank, the water is pumped through an active carbon filter and finally through a UV filter, directly to the consumer.
When you produce fresh water from sea water via Ro-plants, you get about 1/3 of the salt water you pump through membranes - the remaining salt water is used, among other things, to remove the salt coating on the membranes before it goes back to the sea.
this brine has a high salt content which is simply mixed back into the sea.
Regards
ENWA dk Prod.man
ruclips.net/video/6tDyAuWB0LU/видео.html
ruclips.net/video/WG0dFA3GngA/видео.html
We produce drinking water with up to 60 bar over membranes and if you use, for example, up to 5-6 bar in your tank for the tap, we still have over 50 bar to produce and therefore still full production of permate for your tank.
Or, as we do, you could have a storage tank without back pressure, with a level switch that starts and stops the RO-plant as needed and after the tank a small electric pressure-compensated pump that gives the pressure to the tap,
which starts and stops with consumption.