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Recent content by jmj5152

  1. jmj5152

    Damage to a Mixed Bed Polisher

    The resin hitting against laterals would probably not do this damage. I have seen the laterals get damaged like this due to resin expansion/contraction. Resins expand and contract during service/regeneration, and can exert tremendous forces during the exhausted state. If the resins are older...
  2. jmj5152

    Ammonia removal concept for review and comment

    Orenda: So how is it different from an ordinary electrochemical cell which also oxidizes at the anode with the same species? Ammonia and nitrite oxidation to nitrates at the anode has been done for a long time, but is typically not efficient in flow through systems such as the one described in...
  3. jmj5152

    How to calculate backwash regeneration water for demin plant?

    The way you phrase your question implies that you are new to regeneration of resins. It is common for people to refer to the entire regeneration process as "backwash". If you pick up any ion exchange resin specification sheet, it will give you the flow rates, chemical concentrations, and times...
  4. jmj5152

    Different Resin Brands

    Solan: My best experience has been with the R&H & Dow Resins. I still maintain you should stick to your specs. My statement about salesman was misconstrued. Perhaps a better statement would have been to stick to the specs, and do not believe the salesman if he claims there is no difference...
  5. jmj5152

    Different Resin Brands

    Solan: I used to own a company that manufactured a counter current, packed bed ion exchange system. My experience with uniform beads has been very mixed. I have had excellent luck with companies that have a production process that produces uniform beads, but very, very, very bad experience with...
  6. jmj5152

    Ammonia removal concept for review and comment

    Orenda 1168: As I understand, the ECP unit also uses lanthanum chloride, and primary oxidation is achieved via the same mechanism as electrolytic splitting of NaCl. I have a hard time understanding how the microbes survive with chlorine around? Or, how they survive the oxidation potential at...
  7. jmj5152

    Ammonia removal concept for review and comment

    The ammonia level is not too high for treatment via unconventional means. Have you considered electrochemical (anodic) oxidation? Probably cost you less in electricity consumption than the chlor-alkali route you are considering. Air stripping is generally recommended for higher concentration...
  8. jmj5152

    Reverse osmosis

    I assume you mean 5 cubic meters? That is a small R/O plant and a google search will get you many manufacturers. Expect a 50% rejection rate, meaning if your total volume of water to be desalted is 5 M3, then you will get 2.5M3 of desalted water and 2.5M3 of double the salinity water. If you go...
  9. jmj5152

    CO2 removal

    hadidster: CO2(g) + 2NaOH = Na2CO3 + H2O This can happen at room temp also. Not sure what your requirement is, but the pH and other constituents in the NaOH will need to be considered for the path to bicarbonate (HCO3)
  10. jmj5152

    HIGH CHLORIDE WASTEWATER

    louvreChE. Why is the chloride limit so low when you are discharging to the sea?Presumably, you are also using NaOH for the anion regeneration, generating NaCl as your final waste? Sulfuric acid regeneration may be another option. Evaporators for high chlorides will need Hastelloy parts, and be...
  11. jmj5152

    Feedback request on Hydrogen Generators

    Try: http://www.srigc.com/2003catalog/cat-72.htm They make a simple version of Hogen. There is also a company called REB Research (Near Detroit, MI) that makes H2 generators using methanol as fuels.
  12. jmj5152

    Filtration method for 10 micron range

    Stewbaby: There are backwashable stacked disc filters that would work well for you. The discs are held together by compressed air, and filtration occurs radially, inward. When pressure drop is high, the pressure is relieved on the air, and the discs come apart , resulting in an air type...
  13. jmj5152

    Methanol vapor compatibility with PTFE

    moltenmetal: Thanks. Yes, I am cognizant of the costs. The cost is more like $800 for the sq. ft., We have designed the unit with steel plates at the end. We have run a year long test on a 1 sq inch bench top, which worked well. I wanted to be sure before we ordered the machining on the 1 sq ft...
  14. jmj5152

    Augmenting Septic Tank treatment in residential application

    I am building a house on a lot which has no sewer. County health department thinks the water table is too high to allow leach fields for a septic tank. Can anyone help in design of auxilliary post treatment from septic tank system that can be approved by county health officials, and allow me to...
  15. jmj5152

    Water quality for greenhouse

    Smile1: What process does your company use for dealkalization? If it is a weak acid cation resin, you will need to worry more about whether they are allowed to have acids around or not.
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