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  • Users: Nicksun
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  1. Nicksun

    Problems after de-clamping with caustic soda

    Dear All, I got a UPW plant:MMF->ACF->cat-anion->RO->MB->Polishing. Now the MB resin can not separate well, becuase the inlet water is 1Mohm.cm and the setpoint of MB exhaust is according to 50pppt boron. so the H and OH resin still alive and absorb each other. After discuss, we use NaOH to...
  2. Nicksun

    Bubble foam occurs in the SAC/WBA/SBA wastewater

    Dear All, we have one UPW plant in starting up. one problem occurs: the regen WW from cation bed / anion bed get a layer of bubble which malfunction our ultrasonic level sensor. so what causes these bubbles/foaming?? thanks, nick
  3. Nicksun

    Newly loaded resin top level is 7cm less after the 1st time regen

    Dear All, i had made a MB internal repair for one client, and then loaded with new MB resin(R&H 1400H/4000OH). and i loaded till resin level reached the middle of middle sight glass. but after the first regeneration, the top level is 7 cm lower??!! the first reaction is resin is leaking from...
  4. Nicksun

    Can you imagine fine activated carbon was found outlet RO???

    Hi, ladies and gents, Can you imagine fine activated carbon was found outlet RO? We have experienced this situation now. so what size would the carbon particle be? Any one has similar experience with ACF upstream RO plant? ours is a UPW plant. Any comments on this? thanks. Sunbird
  5. Nicksun

    Another problem with activated carbon filter

    Hi, Dear Engineers Now we are confronted with a fine-particle runing out problem with our activated carbon filter(ACF) in our UPW plant. The plant was started 2 months ago. We took SDI sampling outlet ACF recently and were suprised to find that a grayish color on the membrane. And we found...
  6. Nicksun

    the philosiphy in piping and fluid mechanics engineering

    morning,everyone i am a novice in this respect,and i just graduated from college.and now i am with a UltraPure Water making company. and i found there a lot problem to me to deal with this. i need the basic principle of piping,i mean what should i begin to learn,and to learn from.... i am...
  7. Nicksun

    companies dealing with UPW

    Does anybody have any info about the several competitive companies dealing with UltraPure Water? i need it urgently,so let me know. and thank you in advance. sunbirdSZL
  8. Nicksun

    Biosoil treatment of municipal wastewater

    Hi,everyone i got a project which dealing with municipal wastewater by bio-soil treatment,which is one kind of land treatment. Because i have never done something about this,i urgently need the design criteria of this treatment method,such as the loading rate,the operation parameters and so...

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