Pseudomonas removal

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Dear colleagues, 

What is the best sanitation method to remove the  Pseudomonas bacteria from water system as RO , UF,...

Much appreciated

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19 Answers

  1. See this article:https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652019005000603#:~:text=Ozone%20is%20used%20for%20removal,%25)%20of%20microbial%20contamination12. 

    But it should be noted that I have a bias because our US company manufactures  inexpensive electrolytic ozone generators for use in CIP systems, 1000L and under sized tanks, or small personal size devices. :-)

  2. Please, do not forget that removing free-floating bacteria, including pseudomonas, is relatively easy - and all biocide treatments mentioned below can be highly effective. The real problem is biofilm, which is the ideal environment for the proliferation of bacteria, including pathogens - and such microbial layer is much more difficult to remove. As long as there is biofilm, no water system can be considered safe from pathogens - and checking the liquid for free-floating bacteria won't provide any real help. Therefore, it is much more important to ASSESS the efficacy of the treatment, rather than to CHOOSE the treatment itself, solely based on experience. Biofilm monitoring technologies allow to optimize biocide protocols, based on real needs, and to assess their efficacy.

  3. Pseudomonas aeruginosa is a Gram-negative, aerobic, and nonfermentative bacterium, which normally lives in a moist environment. The sodium dichloroisocyanurate is  the most efficient sanitizer in the reduction of the adhered Pseudomonas.  The hydrogen peroxide ias also more effective in the reduction of adhered cells of Pseudomonas.

  4. Pseudomonas aeruginosa is a Gram-negative, aerobic, and nonfermentative bacterium, which normally lives in a moist environment. The sodium dichloroisocyanurate is  the most efficient sanitizer in the reduction of the adhered Pseudomonas.  The hydrogen peroxide ias also more effective in the reduction of adhered cells of Pseudomonas.

    1 Comment

  5. Did you ever tried Aquakristalb-B ? 

  6. You can use Sodium Hypochlorite , produced from common salt to kill the bacteria.  This is an onsite generator , can be operated as per requirement. Hydrogen Paraoxide  is another medium to kill Pseudomonas bacteria. 

    1 Comment

  7. Dear Malik,

    UV is the proper answer. Ozone is too expensive, chlroination is not efficient. If you want to apply physical filtration only, then UF is good, RO is not a disinfection method.

    So the question is UV or UF in the end. If you have good ultraviolet transparency; UVT above 75% at least and no UV adosorbing agnets like dissolved iron (Fe3+) present or other heavy metals and low TSS then UV is the answer. In case UVT is too low then UF. IF TSS is too high you need a phase separation before disinfection...

    Good luck!

    Zsolt

    1 Comment

  8. To sanitize sand filters, I bring the pH to 6.5 and use sodium hypochlorite at 5 ppm for 24 hours

  9. A lot depends on the specification of the membrane manufacturer.  I happen to like DBNPA or peroxyacetic acid if approved by the manufacturer. 

    1 Comment

    1. DBNPA è un modo giusto. È tutto.

      3 Comment replies

      1. thanks so much , could you please provide us with the name of supplier 

  10. Good Afternoon Malik,

    Please advise daily volume and application.  

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  11. Medium pressure UV systems remove it easily. It is clean, no chemicals needed and no residual effect. We have been doing it successfully for over 10 years.  

  12. Medium pressure UV systems remove it easily. It is clean, no chemicals needed and no residual effect. We have been doing it successfully for over 10 years.  

  13. Dear Malik, based on my experience and POV it's very important and should be totally necessary to know the application/process. i.e. you cannot use chemical disinfection in a pharmaceutical process or in an alimentary process that uses water as ingredient. In general terms, I would suggest ClO2 disinfection (chlorine dioxide).

    1 Comment

    1. beverage industry we used  (chlorine dioxide) & oxzonia  but no result 

  14. You can use ozone too, it is the most powerful commercial disinfectant you can find.
     

  15. Based on my treatment ideas, if you can use  rapid sand filter, activated carbon and finally advance oxidation processes,  it can get rid of that...