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  1. GarySCWSVI

    Minimum flowrate in IX water softening to prevent channeling

    1 gpm per cubic foot of resin is a better number than the RH suggestion. Our recommendation is 8 - 40 BV/h. 1 gpm/ft3. Gary Schreiber, CWS VI The Purolite Co.
  2. GarySCWSVI

    Iron & Mn Removal

    All of those you named are viable techniques. Which one would be best for you depends upon the analysis of the water to be treated and the use for the treated water. You can post the analysis here to get other responses or I would be happy to assist you if you send me the info...
  3. GarySCWSVI

    Oil detection method in an effluent flow of water?

    A quick test for oil in water is to flake off some flakes from a Camphor Stick (available in most Pharmacies) into a bowl of water. If the flakes spin there is no oil. If they do not spin oil is present. Not a quantitive test but one that indicates presence. Subject lab tests will give the...
  4. GarySCWSVI

    Are Landscape Architects qualified to design water distribution?

    Most all Architect's I have dealt with either have Mech. E's on staff or work with an outside Mech. E. companies for those design factors. Gary Schreiber, CWS VI The Purolite Co.
  5. GarySCWSVI

    WT construction methodology

    Here is a link to one installation web site: http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADB224310 Gary Schreiber, CWS VI The Purolite Co.http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADB224310
  6. GarySCWSVI

    Iron removal from borehole water

    Dissolved Ferrous Iron and chlorine form Ferric Iron. Done all the time in the Water Treatment Industry. Oxidize the iron with chlorine and then filter it. I have seen many "orange" swimming pool waters. Much of that Ferric Iron ending up on the bottom of the pool. Gary Schreiber, CWS VI The...
  7. GarySCWSVI

    Water Quality Question

    Most membrane manufacturer's and supplier's that I know disclaim using membrane (RO, UF, NF, MF) for bacteria removal. Bacteria can grow thru the membranes. I agree with the previous statement by Purewater guy: "Also been reading Reverse Osmosis is not a good source for Gram Negative Bacteria...
  8. GarySCWSVI

    Orange Tint in Water Samples

    Chlorination will cause dissolved iron to precipitate to Fe3 and will give the water that orange tint. Gary Schreiber, CWS VI The Purolite Co.
  9. GarySCWSVI

    Water Quality Question

    You need to have whoever tested the water to identify which "Gram Negative Bacteria" is present. Just saying Gram Negative Bacteria is way too general. It encompasses a whole lot of bugs. Some good for us. Some bad for us. Gary Schreiber, CWS VI The Purolite Co.
  10. GarySCWSVI

    pH of demineralized water

    I agree with bimr. Morpholine is also fed to be carried over in the steam to prevent corrosion outisde of the boiler drum. Gary Schreiber, CWS VI The Purolite Co.
  11. GarySCWSVI

    Salt slippage

    Increased chlorides in the soft water is typically due to insufficient rinsing of the resin bed during the regeneration cycle. I suggest that you either increase the length of the slow rinse or the fast rinse time. Try increasing slow rinse time first. You can also do a Brine Elution Study to...
  12. GarySCWSVI

    Tannins removal

    In addition to, and I personally believe is better, is to use tannin removing ion exchange resin for your application. Most of the ion exchange resin manufacturers make special resins for this purpose. The resins are regenerable on site using sodium or potassium chloride salt. The...
  13. GarySCWSVI

    Residue Found in Softener Valve Head

    I agree with bimr. Softeners are not good at filtering particulate. Either adjust the pH or install a prefilter before the softener. Gary Schreiber, CWS VI The Purolite Co.
  14. GarySCWSVI

    Maximum Freeboard for Ion Exchange Backwash

    The only limit is not having enough freeboard. That rule of thumb is a good one BUT that all depends upon the make up of the solids that the resin bed may filter out or the resin fines (broken beads) that backwashing causes. I am not personally aware of having too much freeboard being a...
  15. GarySCWSVI

    Maximum Freeboard for Ion Exchange Backwash

    You can find that info on most ion exchange resin manufacturers Technical Data Bulletins. "In general" 75% freeboard based on 50% bed expansion is okay to use. However, 4 other factors come into play. 1. Is is cation resin or anion resin or mixed bed resin. 2. What is the water temperature...
  16. GarySCWSVI

    Water Purification

    That all depends upon the contaminants in the water and what the water will be used for. Your question is similar to "How high is up?". If you can tell us more about the application we can lead you to sources of information. Meantime you can do a Google search for "Water purification in a...
  17. GarySCWSVI

    water treatment

    Here is a helpful Internet link: http://www.hcronline.com/techdata/B/Bleach%2012.5%25%20Industrial%20TECH.pdf I agree with the others regarding "chlorine demand" of the solution to be disinfected and to be aware of "degradation" of the chlorine prior to use as advised in the link. Gary...
  18. GarySCWSVI

    "Brine Maker" or "Brine Saturator" Design Guide

    Check out this web site: www.designtanks.com/UserFiles/File/Brinemaker.pdf Gary Schreiber, CWS VI The Purolite Co.http://www.designtanks.com/UserFiles/File/Brinemaker.pdf
  19. GarySCWSVI

    Hard water softening

    A little more input here. Farmers have told me that when the soften the water to cattle the cattle drink more of it. That is a good thing as far as the Farmer is concerned. Their theory, not mine, theirs, is that the cattle drink a lot of rain water and shy away from hard water. Idea is that...
  20. GarySCWSVI

    Hard water softening

    Never recommend any form of water treatment without knowing what the water to be treated analysis is. Many cattlemen soften their water by ion exchange water softeners. There may be other constituents in the water such as Sulfates that will require something other than water softening. The...

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