Seperate DI canisters real world test

[bdejong1112o]

So I put in a RODI system for my new tank. I went with the BRS 150GPD system from BRS. Have to start by saying that BRS has excellent customer service. I had a few fittings that leaked and they sent me replacements immediately and without question.

I am on a well and while generating the initial water for my 220g and my friends 120g tanks I was surprised at how fast it went through the DI resin. I mean really fast. I did use dual DI resin canisters based on thier recomendations for best efficiency of the resin.

Researching this issue brought up the fact that on a well the CO2 is usually high and this wil exhaust resin even if the TDS is low comming out of the RO membrane.

I then found another video from BRS that talks about using seperate canisters for both the Anion and Cation resins with a final mixed canister. The order is Cation - Anion and then mixed.

So I decided to give it a try. I ordered the additional canister and plumbed it in. I started to fill up my 60g barrel using teh new configuration and what do you know. I am burning through the Anion resin at a extremely fast rate while not even touching the Cation. Take a look at the picture and you will see that after only 40gallons the Anion resin is already a 1/4 changed while both the Cation and Mixed resins show no discoloration.

Cation in the first cartridge, seond has the anion and the last one is a mixed cartridge.

What does this all mean for me? Well, I just need to keep large stocks of Anion resin. It also means that I was throwing away a ton of perfectly good Cation resin in the mixed cartridges that I was using. This is going to save me a good amount of money. So BRS was right on the money in thier test and this is a demonstration of that in a real world situation. I would guess that others on well water could benefit from doing the same.

https://www.bulkreefsupply.com/vide...ates-mixed-or-single-bed-di-resin-maybe-both/

This is one thing that I appreciate about BRS. They do quite a bit of these types of tests with data and it really helps some of us.

 

[Brew12]

So I put in a RODI system for my new tank. I went with the BRS 150GPD system from BRS. Have to start by saying that BRS has excellent customer service. I had a few fittings that leaked and they sent me replacements immediately and without question.

I am on a well and while generating the initial water for my 220g and my friends 120g tanks I was surprised at how fast it went through the DI resin. I mean really fast. I did use dual DI resin canisters based on thier recomendations for best efficiency of the resin.

Researching this issue brought up the fact that on a well the CO2 is usually high and this wil exhaust resin even if the TDS is low comming out of the RO membrane.

I then found another video from BRS that talks about using seperate canisters for both the Anion and Cation resins with a final mixed canister. The order is Cation - Anion and then mixed.

So I decided to give it a try. I ordered the additional canister and plumbed it in. I started to fill up my 60g barrel using teh new configuration and what do you know. I am burning through the Anion resin at a extremely fast rate while not even touching the Cation. Take a look at the picture and you will see that after only 40gallons the Anion resin is already a 1/4 changed while both the Cation and Mixed resins show no discoloration.

Cation in the first cartridge, seond has the anion and the last one is a mixed cartridge.

What does this all mean for me? Well, I just need to keep large stocks of Anion resin. It also means that I was throwing away a ton of perfectly good Cation resin in the mixed cartridges that I was using. This is going to save me a good amount of money. So BRS was right on the money in thier test and this is a demonstration of that in a real world situation. I would guess that others on well water could benefit from doing the same.

https://www.bulkreefsupply.com/vide...ates-mixed-or-single-bed-di-resin-maybe-both/

This is one thing that I appreciate about BRS. They do quite a bit of these types of tests with data and it really helps some of us.

Great stuff! Thanks for sharing!

 

[mlb75]

Curious what the TDS readings are pre filter, post RO, and then after each of the DI chambers. Also what kind of other media are you running, sediment? carbon? what kind of carbon and how many? With using up resin that fast I'd have bet you had the waste and pure water mixed up coming out of the RO membrane or membranes. Very interesting situation though...

 

[bdejong1112o]

I have not measured pre filter or straight out of my well. I am running a 5um sediment filter, 5um carbon block, dual RO membranes and then to 3 DI canisters.

I do have measurements post RO membrane. After flushing its always at the most 4. I was always 0 after both canisters. That is until the resin was exhausted.

I did get another dual tds meter with the new canister so I can measure after each of the new resin canisters. I will write them down the next time i make water.

 

[topjimmy]

I'm on a well also. I use a 30g brute to capture the permeate from the ro, I then run an airstone in the container for 24 hours. This removes pretty much all of the excess co2. From there I pump the water with a mag 5( that I can use for a spare return pump) into the dual di cartridges. Saving the di from premature depletion.

I also recharge the di when exhausted.

 

[bdejong1112o]

I looked into doing the same thing as it was one of the possible solutions for high co2 well water. It really came down to me, lol. I just didnt want to do the extra steps for the outgassing. I have heard it works very well though.

Here is an update on the multi resin setup. It is very obvious that on my well in my setup the Anion resin is the one being depleted at a fast rate. The Cation and the final mixed bed have not even a single granual changing color yet. This is where the cost savings comes into play. It shows that for every canister of mixed bed that I threw out I was wasting all the Cation resin. With the new setup I can change out just the Anion and keep going. I have made about 100 gallons on this canister of Anion so far.

I am fairly surprised at how the resins are being used up. I had expected the Cation and mixed bed to be depleted at a slower rate but not this slow. Its very eye opening and shows the testing done by BRS has some real merit.

 

[yellrihs]

I looked into doing the same thing as it was one of the possible solutions for high co2 well water. It really came down to me, lol. I just didnt want to do the extra steps for the outgassing. I have heard it works very well though.

Here is an update on the multi resin setup. It is very obvious that on my well in my setup the Anion resin is the one being depleted at a fast rate. The Cation and the final mixed bed have not even a single granual changing color yet. This is where the cost savings comes into play. It shows that for every canister of mixed bed that I threw out I was wasting all the Cation resin. With the new setup I can change out just the Anion and keep going. I have made about 100 gallons on this canister of Anion so far.

I am fairly surprised at how the resins are being used up. I had expected the Cation and mixed bed to be depleted at a slower rate but not this slow. Its very eye opening and shows the testing done by BRS has some real merit.

What is your TDS out of the Anion stage?

 

[Water Dog]

Are you assuming resin exhaustion by color change or through an actual TDS reading? I never trust the color changing resin. When I was using color changing resin, I would still get 0 TDS readings for months after the color change indicated that my resin was supposedly “exhausted.”