Chloramine monster

scuzy

scuzy

Active member
My rodi is setup like this

1micron sediment -> brs chloramine monster -> chloramine 10bb puratec -> chloramine 10bb puratec -> booster pump -> 100gpd membrane - > 100gpd membrane in series -> dionize cart.

I'm getting 300 TDs from tap and 20tds before Di .

I notice that I'm still seeing very small trace of 0.06 total chlorine on my product water. Would adding another chloramine monster in series be a waste of time?

I was thinking of swapping out the 10" sediment fter with a 20" sediment filter and adding on one more brs chloramine monster. Anyone think those is an overkill?

Thanks


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I'd be concerned about your RO membrane. Chlorine is pretty hard on them. It's doesn't sound like it's working very well if your still getting 20 tds.
 
Chloramine monster

I heard you can get 20 TDs still right before the dionize cart

It fluctuates around 10-20 TDs then almost 0 after DI.
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Last edited:
scuzy said:
My rodi is setup like this

1micron sediment -> brs chloramine monster -> chloramine 10bb puratec -> chloramine 10bb puratec -> booster pump -> 100gpd membrane - > 100gpd membrane in series -> dionize cart.

I'm getting 300 TDs from tap and 20tds before Di .

I notice that I'm still seeing very small trace of 0.06 total chlorine on my product water. Would adding another chloramine monster in series be a waste of time?

I was thinking of swapping out the 10" sediment fter with a 20" sediment filter and adding on one more brs chloramine monster. Anyone think those is an overkill?

Thanks


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Click to expand...

What membrane are you using? 94.5% rejection seems pretty bad. My guess is before the chloramine monster was installed they were damaged or they are just low to begin with. You aren't moving much more water than me and I am using a .5 micron sed followed by the booster pump, single Pentek Chlorplus 20BB followed by two 10" Chlorplus blocks, and a .5micron carbon block. Dual spectrapure 90gal 99% membranes. I'm 150in, 0-1 pre di, 0 post.

What ratio are you running the membrane at?

What does chlorine measure when you remove the booster pump?

You may want to use a Pentek Chlorplus 20BB cart as it is 1 micron. It may polish the water to a lower level. I have never seen breakthrough even after almost 3 years of service from the chlorplus 20bb. It's also cheaper than the chloramine monster which is a 25micron Pentek CRFC20-BB. The CRFC20 has a higher total capacity but I don't think that matters so much, they're both huge numbers.

A simple test would be to see if you are able to reduce the chlorine breakthrough without use of the booster pump. This will increase contact time through the carbon.

Also, what test kit are you using and can you link your 10bb carts? That seems like a lot of carbon for chloramines to still be breaking through.
 
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Chloramine monster

I'm not using the booster pump before the chloramine monster. It's inline right before the membranes.


I was using the aquafx 100gpd membranes. These were newly installed after the getting the chloramine monster and two chloramine 10bb carts.

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Ok I'll test it out. Going to switch the 10" sediment with a 20" sediment 1 micron cart, use the 10" cart as an added 0.5 matrix cart before the booster and see how that works. Going to pop on one more chloraplus 20bb after the chloramine monster if I still get title chlorine detection. This will for sure increase the contact time.


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You should contact AquaFX about your membranes. You should be getting more than you are unless... you ended up with two DOW 100gpd membranes instead of the AquaFX membranes. IIRC they produce their own membranes from DOW flats and guarantee 96-98% rejection. You may have gotten bad ones. They should be producing 100gpd at 50psi, at least that is what they are rating them at. Give them a call and see what they say. 100gpd DOWs get 90% rejection rates so I doubt you have them but still... worth a call.

If you can, use a .5micron sediment. This will help protect the pores in the carbon blocks. I don't think you need a 20" here. Heck I am still using a standard 10" for the prefilter. We're not flowing crazy high flow rates, just trying to deal with the liquid devil chloramines.

Definitely pull the booster pump and see what happens before making any changes.

What test kit are you using?
 
Chloramine monster

Should I change to a spectrapure 90gpd since it has higher rejection rate?


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Chloramine monster

The aquafx 100gpd is 98% rejection. I think it's cause I'm trying to get 1:1


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Yeah, that isn't a good idea unless you are behind a water softener. It will burn them up quick. That membrane really should be run 4:1, same with the spectrapure.


I was asking about the test kit because I've run out of mine... didn't even realize hanna had one. I ordered the ultra low range total chlorine checker. Interested in what it says. Way higher resolution that what I was using.
 
Was getting 0.06ppm total chlorine. I was getting 2.5-3ppm before adding the chloramine monster and the chlorplus 10bb x2


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scuzy said:
Was getting 0.06ppm total chlorine. I was getting 2.5-3ppm before adding the chloramine monster and the chlorplus 10bb x2


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Click to expand...

If I remember correctly .1ppm is the max acceptable limit. I could be wrong though.

Hanna shows +-.03ppm on your test kit so... you could be anywhere between .03 and .09.

I'm curious as to what it says after running without the booster pump. Do it now :lol: Let it run for 10 to 20 or so minutes before testing to clear out all the water made with the booster pump.
 
Also iirc a thin film membrane can handle 1000ppm hours of chlorine. 1000 = (exposure time x exposure in ppm)

At .06ppm your membranes should survive 694 days of exposure at that level. At 1:1 though I think they would fail sooner than that.
 
Got my Hanna ULR Total Chlorine Checker in today. My waste water measures 29ppb or .029ppm. That's on a 2 year old Chlorplus 20bb that has produced somewhere around 8,000 gallons of RODI on dual spectrapure 99% membranes with a 4:1 ratio. I use a booster pump.

I'm using a .5 micron sediment filter and following the 20bb chlorplus with two standard 10" chlorplus and a single .5micron spectrapure carbon block.
 
I have a Spectrapure Maxcap 90GFD without any of the elaborated setup as you do, everything is stock filters, the TDS of SJWC water right off the faucet is 297, but only measures 2 TDS after RO. Its still like this after 1 year of service but I am losing track of how many gallon water it has produced. I used to have a BRS's RODI and believed that all RODI are equal since the membranes are manufactured by Filmtech but struggled to hit below 6 TDS after RO, since switched to Spectrapure I now believe the two systems are not created equal even though the membranes are from the same manufacture.
 
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I ordered a chloraplus 20bb and a second big blue to allow for double contact before the membranes.

My system now 1micron 20" sediment -> chloramine monster -> chloraplus 20bb -> chloraplus 10bb -> chloraplus 10bb -> 0.6 micron matrix --> booster -> 100gpd membrane in series --> Di this should be goods for a long time.


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