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Waste water from RO through HMA filter

Yeah, but your HMA filter would need replacing regularly as the RO waste would be more concentrated in minerals than tap water.

Use a pump and cut your waste down to minimal, forget 'no waste' as itll cost you more in the long run.
 
how there is no water at all going down the drain
 
how there is no water at all going down the drain

Running through your HMA would cause it to need replacing more regularly than if using a HMA on a normal tap, due to the accumulation of Solids in the waste from the RO.
 
As I said before if you are mixing the RO water with HMA'ed RO waste water there is no point in having the RO unit.

1. The RO pre-filter will remove sediment, chlorine, chloramine & organics (same as HMA filter will). Chlorine and organics will degrade the RO membrane.
2. The output of the RO will effectively be pure water.
3. The RO waste will contain the carbonates, nitrates, chlorides & metals (mainly magnesium and calcium).
4. Feeding this via a HMA filter will remove the heavy metals, leaving the carbonates, nitrates, chlorides, magnesium and calcium. The HMA would also remove chlorine and organics, but these have been removed by the RO pre-filter.
5. You mix RO and HMA water. You now have water with same levels of carbonates, nitrates, chlorides, magnesium and calcium as you source water, just no chlorine, organics (filtered by RO filter) and no heavy metals (filtered by the HMA filter).

You could therefore achieve exactly the same using just the HMA filter.

In fact even cheaper just use UK tap water and any good brand dechlorinator. As well as taking out chlorine/chloramine most will remove heavy metals as well, not that heavy metals in UK tap water is ever an issue.
 
As I said before if you are mixing the RO water with HMA'ed RO waste water there is no point in having the RO unit.

1. The RO pre-filter will remove sediment, chlorine, chloramine & organics (same as HMA filter will). Chlorine and organics will degrade the RO membrane.
2. The output of the RO will effectively be pure water.
3. The RO waste will contain the carbonates, nitrates, chlorides & metals (mainly magnesium and calcium).
4. Feeding this via a HMA filter will remove the heavy metals, leaving the carbonates, nitrates, chlorides, magnesium and calcium. The HMA would also remove chlorine and organics, but these have been removed by the RO pre-filter.
5. You mix RO and HMA water. You now have water with same levels of carbonates, nitrates, chlorides, magnesium and calcium as you source water, just no chlorine, organics (filtered by RO filter) and no heavy metals (filtered by the HMA filter).

You could therefore achieve exactly the same using just the HMA filter.

In fact even cheaper just use UK tap water and any good brand dechlorinator. As well as taking out chlorine/chloramine most will remove heavy metals as well, not that heavy metals in UK tap water is ever an issue.



+1 agree

Apart from point 5. Cutting tap water ( RO waste water in this case ) with RO water is a good way to get desiried KH GH NO3 levels etc without adding costly buffers etc.


is it possible to run the waste water from an RO unit through a HMA unit to use it as part
of the tanks daily water changes

Yes

But why would you want to?

If it is to conserve water then you can run the waste water through a second RO membrane, increasing your RO production.

If it is so that you can cut RO with Tap (- Clorine etc) then go for it. You may want two storage tanks though one for Ro and other for HMA treated waste water.

And as others have said with the rest of the waste, water the garden :)
 
+1 agree

Apart from point 5. Cutting tap water ( RO waste water in this case ) with RO water is a good way to get desiried KH GH NO3 levels etc without adding costly buffers etc.




Yes

But why would you want to?

If it is to conserve water then you can run the waste water through a second RO membrane, increasing your RO production.

If it is so that you can cut RO with Tap (- Clorine etc) then go for it. You may want two storage tanks though one for Ro and other for HMA treated waste water.

And as others have said with the rest of the waste, water the garden :)



it is so that there is no waste water at all using a second membrane still as waste water with using the ro waste water
through a HMA unit there is no waste water at all and the water from the hma will ne used to reminerlize the RO water
 
I think that is a good idea. Especially for people who are on a water meter.
And you also save on re mineralising salts :)
 
I think that is a good idea. Especially for people who are on a water meter.
And you also save on re mineralising salts :)
well thank you i was given the idea from someone else to be honest :thumbup:
 
Running through your HMA would cause it to need replacing more regularly than if using a HMA on a normal tap, due to the accumulation of Solids in the waste from the RO.
but it would work and yes the hma water would be used to reminerlize the RO water that is what i am wanting
it to do why is people think that if you use RO water you have to use it to remove carbonates the waste on the RO
passed through HMA should do the job fine then
 
The objective is illogical due to Non sequiter.

RO waste water contains highly concentrated levels of toxins and pathogens.

The Heavy Metal filter resins do not remove these toxins, so the only way to prevent reintroduction of them into the tank is to have additional specific filtration modules, such as a carbon stage. HMA only removes exactly what it's name implies; Heavy Metals. It may easily be therefore that your water is not high in Heavy Metals concentration, but yet could be high in many of the toxins that HMA filters ignore.

So, on your schematic where is is annotated "HMA Clean Water", in fact, the water is anything but clean.

I suppose if you monitor and control the amount of the HMA output that finds it's way back into the tank, as we often do when using RO waste to remineralize the RO Clean water, then that would be OK, but it will be an illusion of the highest order for you to assume that the water is clean exiting the HMA filter. That water should still be considered RO waste. You also have to consider what effects those waste products in higher concentrations will do to your HMA resins.

Cheers,
 
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