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Recent content by ajw160

  1. ajw160

    pH measurement of oily water after gas/water separator

    Hello All: I'm looking for a relatively maintenance-free and robust solution for accurate measurement of pH for use after a gas/water separator in an oily water environment. Max temperatures will be around 120F with pressures possibly reaching nearly 500 psi. Doing this type of thing in a...
  2. ajw160

    Handheld Meter Recommendations

    I've been in contact with a lot of MyronL's and generally they're fantastic.
  3. ajw160

    bio slime

    Floridaboy: Try some non-oxidizing biocides: Glutaraldehyde or maybe Isothiazolin (active names). Both of these are extremely effective at penetrating and killing because they are cell de-stabilizers and not oxidizers (therefore are nicer to metals). However, because of that nature the kill...
  4. ajw160

    Ozone/bromine vs. chlorine dioxide

    Aldream and ProjectEng, Dissociation probably wasn't the best choice of words in that post. What I was getting-at is the percentage of product available as Active, which does the killing. I tried to paste a graph in here...but anyway...here is roughly how things work-out...
  5. ajw160

    Hot water pipes, joining copper to iron

    Well, theory says that everything wants to equalize and be happy. The water moves the electrons. Unless the water itself is non-conductive you will get galvanic corrosion. How bad? How fast? Who knows.
  6. ajw160

    Ozone/bromine vs. chlorine dioxide

    An extremely effective and cost effective option for "cycled" water with relatively high pH, say above 8.5, (where you are operating), is to manufacture hypobromous acid on site--that is a ratio of a chlorine source and Sodium Bromide. The chlorine source can be liquid or gas with...
  7. ajw160

    On-line citywater alkalinity measurement

    Yes, cold lime softening is being used. But per regulation, city water quality needs to be continuously verified and recorded. All maintenance on the meter is current and has been performed to specs. My current guess is that an unknown interference is present in too high quantities that is...
  8. ajw160

    On-line citywater alkalinity measurement

    Thanks for the reply. Yep, Alk is related to pH and we're monitoring that too (it's for a beverage manufacturer). The log makes it difficult to get the precision that is needed. That said, I've run-across problems with the same brand of controller and apparently often-times the widely...
  9. ajw160

    On-line citywater alkalinity measurement

    Hello All: Has anyone here had any successful dealings with Hach's APA 6000 meters? The problem we're having is that the automated readings are not even close to the manual testing. Perhaps a specific backround interference is affecting one test but not the other (methyl purple and N50 as...
  10. ajw160

    CT Blowdown Re-use Options?

    4 to 5 cycles is on the low side for a cooling tower application (if you're talking about boiler blowdown the game is already over with respect to running any type of effective treatment program); it is difficult to say what can be done without knowing what is in your city/well makeup, but...

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