Looking for reverse osmosis with less than 25% waste

[Miyuki]

Are there any people with knowledge about reverse osmosis?

I know some industry-scale systems can do this. But I want it with a small (medium) system with a rate of demineralized water of about 1 l/min.
It will be fed with relatively highly mineralized ground water (plenty of Mg and Ca). And I do not like to throw plenty of water to waste.

Do any of you have some experience with it?

[thm_w]

From what I read, typical system wastes 70-90% of the water. So 25% waste would be incredibly hopeful.
Is it necessary to remove the minerals?

https://www.reddit.com/r/WaterTreatment/comments/iiatn5/zero_waste_reverse_osmosis_system/

[strawberry]

to collect Mg and Ca much faster use two membranes and separate ore with compressed air at the same time cleaning memrane

[NiHaoMike]

Drinking water is a small part of residential water use. Just use the "waste" water for other stuff?

[m k]

How much per day?

You can always recycle it and hope that your tank is concentrating the heavy stuff.
Shaping the tank and creating a vortex in it may help.
You must also measure what you get so few more sensors are probably acceptable.

E,
If output is not enough you have two possibilities, more power or less recycling.

Industry usually has no space problems, so they use reservoirs, if possible.

You can also cascade the process, but since it's a forced operation you need more pumps.
Measuring apparatus can be just one that is selected between different membranes, if final quality is not absolute.

After process has started it is very stable, if recycling is only partial.
Measuring apparatus can of course adjust the flow constantly also, if needed.

The scale of expenses is probably few thousands, that's many qubes of raw water, but only "a drop" if need is constant.