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JOGARA
27-10-2017, 01:53 AM
Hi all!

I have been using quite a bit of de-ionized water lately and looking to reduce my costs.

Currently I am getting 5L for 2.29 at my EuroCarParts.
That is around 46p per liter.

With the anodizing setup in my workshop now I am using a lot more than normal. I keep clearing out my local branch too so looking to buy a de-ionizing kit to reduce cost, time spent getting the stuff and ease of having it on tap..

From my research, to de-ionize all you really need is a resin filter.
There are full reverse osmosis systems out there but is that all really needed if you just want de-ionized?

I have been looking around and have found a filter that is pretty much self contained. It is 30 and does around 2000L. So works out to around 1.5p per liter excluding metered water. https://www.eastmidlandswater.com/Details.asp?ProductID=758
Which is around 1 per 1000L so add .1p to that.

1.6p per liter is a lot better than 46p plus the fuel driving back and forth.



Am I on the right track here?

Thanks
Jack,

Neale
27-10-2017, 06:47 AM
Having used a small deioniser filter as part of a wire edm machine recently, which needs a continuous supply of pure water, the resin exchange mechanism certainly seems to work. I can't comment on running costs as our use is very different but it seems that you can reduce running costs by starting with something like rainwater to reduce the "load" on the resin, and a cheap TDS meter is very useful to monitor water quality coming out, so that you know when the resin is getting exhausted. Our filter uses a refillable filter cartridge which helps reduce cost but it rather depends on the quantities you are taking about.

EddyCurrent
27-10-2017, 09:07 AM
There's gallons of distilled water comes out of my shed dehumidifier, that would be a cheap start if you know someone who runs such a device.

cropwell
28-10-2017, 03:46 PM
My Gran used to have a water softener (In the '50s) 23113 and it was regenerated using salt. I wonder if there is any way of reviving spent deionising cartridges in a similar manner. They are both based on ion-exchange resins.

JOGARA
06-04-2018, 07:54 PM
Went for this system, Finerfilters 4 Stage Compact Reverse Osmosis Filter With DI Resin (100 GPH) (https://www.amazon.co.uk/gp/product/B01N6DV59S/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1&_encoding=UTF8&tag=a002ee-21&linkCode=ur2&linkId=44e8c24ba537df5685f605a6109e6084&camp=1634&creative=6738)

It is only 57 and should last a decent amount of time.


Don't have water into the workshop yet so just shoved it on a stick by the outside tap..

https://s9.postimg.org/5txvpytx7/IMG_20180406_190057736_HDR.jpg (https://postimg.org/image/5txvpytx7/)

Within a few hours (4-5) I had 20L made.
https://s9.postimg.org/4rnp7fy97/IMG_20180406_190105810_HDR.jpg (https://postimg.org/image/4rnp7fy97/)


Using this TDS meters, Yakamoz LCD Digital TDS-3 Meter Temp PPM Tester Pen (https://www.amazon.co.uk/gp/product/B06Y2YCKS5/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1&_encoding=UTF8&tag=a002ee-21&linkCode=ur2&linkId=68ad0b7002b1cb75f0a3790fd5d5cb7f&camp=1634&creative=6738)
Found that our tap water is between 120-160 (taken at multiple times of the day, is that a thing?)
The filtered water, 000 :)
https://s9.postimg.org/lff79xlaz/IMG_20180406_190901373.jpg (https://postimg.org/image/lff79xlaz/)

https://s9.postimg.org/tkx982mej/IMG_20180406_190339882.jpg (https://postimg.org/image/tkx982mej/)


With the 20L I have made, waste water is nearly 200L.
This will be used elsewhere but is a lot more than what others are saying being 1:3-1:5 ratios.
Apparently you can/should clamp the waste to get better ratio?

Either way. Cheaper per liter still.
SevenTrent are charging us "2.41" per 1000L of water. I was paying 2.29 at ECP so even with the 20-30L I had to flush through the system to prep it I am less than a quarter the price already (excluding the system setup and running costs).

10/10 Would recommend.

Clive S
06-04-2018, 09:21 PM
Either way. Cheaper per liter still.
SevenTrent are charging us "2.41" per 1000L of water. I was paying 2.29 at ECP so even with the 20-30L I had to flush through the system to prep it I am less than a quarter the price already (excluding the system setup and running costs).


In our location if you are on a meter we are charged per cubic Mtr for water from the meter and then get a bill for the same amount for putting in down the drain.

JOGARA
06-04-2018, 09:24 PM
In our location if you are on a meter we are charged per cubic Mtr for water from the meter and then get a bill for the same amount for putting in down the drain.

Ohhh shit is that how they work it out?

Makes sense. What ****s xD


Ill take this system over to my grandmother's house. They are not on meter there so can run 24/7...

Clive S
06-04-2018, 09:35 PM
Ohhh shit is that how they work it out?

Makes sense. What ****s xD


Ill take this system over to my grandmother's house. They are not on meter there so can run 24/7...

Or has been mentioned get a humidifier and kill two birds with one stone.:friendly_wink:

JOGARA
06-04-2018, 09:39 PM
Or has been mentioned get a humidifier and kill two birds with one stone.:friendly_wink:

More in electricity than it is worth.

The garage stays really dry even with all this rain. Helps that the air compressor sucks up said moister....

Desertboy
06-04-2018, 09:54 PM
Recover the water and feed it through again with a water pump and tank.

JOGARA
06-04-2018, 10:12 PM
Recover the water and feed it through again with a water pump and tank.

Wont that eventually clog up the filters?

cropwell
06-04-2018, 10:16 PM
Keep recirculating until all you have is pure water and lumps of whatever :glee:

Desertboy
07-04-2018, 10:32 AM
Wont that eventually clog up the filters?

Discard the last 20% of water and the issue is slight but just using a higher pressure pump will give you much better efficiencies even without recirculation.

Water with a TDS of 0 is very corrosive it's not really suitable for long term storage as it will leach from containers, I'm not sure a TDS meter would even detect plastics leeched as they are detecting the conductivity of the water (Salt levels).

The other thing to consider with filter life is the input water. Not sure what you're tap water readings are but I get an EC of 0.4 out the tap in Leicester, in London it was 0.8 and in Sterling Scotland we were getting an ec of 0 out the tap!

So a filter in London is not going to last as long as one in Leicester and in Sterling it'll probably last for years.

Cost is only one part of the equation of course and even if it cost the same as buying distilled water there's inherent value in being able to process at home and you're water is probably purer then bought water which has sat in plastic leeching for god knows how long.

We were using RO for hydroponics and Aquaponics so plastic leeching was more of an issue for us for most users it's a non issue.