Hey I was just about to order the replacement filters for my filterguys RO/DI system and was wondering if anyone knew off hand whether dpw uses chlorine or chloramine. I live in Warren but believe it is all the same.
It really does not matter, a single good 0.6 micron 20,000 gallon Chlorine Guzzler carbob block is more than sufficient for both free chlorine and chloramines.
Many vendors try to scare buyers in to buying "special" chloramine filters. In truth, chloramine removal is not that tough. You need good DI resin much more than any special carbon since a good carbon block will adsorb the chlorine portion of chloramines, its the ammonia portion many overlook and thats where the quality DI system comes in to play. I would upgrade my DI system and drop back to a single 0.5 or 0.6 micron Chlorine Guizzler. Less pressure drop across the membrane so more production and potentially higher quality effluent.
Dual carbons are a holdover from years ago when carbon was not as refined or understood as it is today. On many of the ebay quality systems it is used to make up for low quality, high micron or unrated size, and low capacity carbon, often in granular form. Many granular carbons are exhausted in as little as 300 total gallons, thats 240 waste gallons and only 60 treated RO/DI gallons. Some carbon blocks only last 1000 to 1500 gallons so again thats only 200 to 300 treated gallons.
With the advent of carbon blocks such as the Matrikx+1 from KX they can now blend and extrude carbons for maximum performance and lifespan. get a single Chlorine Guzzler and convert that empty housing in to a second DI for better water. It will extend you DI life tremendously.
I have had a hard time finding the correct info on this so now that Ive spoken to a person with a phd in chemical engineer and a masters in material science who was a supervisor for the Detroit water department for 20 years and now works for the army testing water supplies.Detroit not only supplies all of wayne county but the majority of surrounding cities.Detroit not only supplies all of wayne county but the majority of surrounding cities.
Detroit stopped using CHLORINE in lieu of CHLORAMINE well over 10 years ago.Detroit DOES NOT use chlorine.Chloramine Does not disipate or evaporate, nor can it be boiled out, you must have a chloramine filter.Read more:
the water treatment facility belongs to hamtramck... just though id point out that its not detroit using these additives, its hamtramck. i had a professor that would go on rants about the politics about that place, though it was a government class so still appropriate.
Not sure about some of the recent posts here but chloramines are comprised of chlorine and ammonia. Any good quality 0.5, 0.6 or 1.0 micron carbon block such as the popular Matrikx +1 series is more than capable of removing the chlorine portion of the chloramines and a good mixed bed DI with proper contact time removes the ammonia. Carbons DO NOT remove the ammonia and the ammonia is what we are most concerned about here.
When I say proper contact time on the DI that means a full size, 10" vertical DI filter, packed properly and with bottom up flow so all resin and water come into contact with each other. Its no big deal and done every day.
It was my understanding that most of the good carbon filters will remove chloramine as a whole, the chlorine and ammoia. Eliminating the need for a di, for the purpose of removing the ammonia part of chloramine anyway. I thought An average carbon filter will not seperate atoms as you described above. Please correct me if im wrong, point me in the direction of one that will seperate chlorine atoms from ammonia atoms.
Detroit Public Water
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