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Semi-quantitative characterization of electroporation-assisted disinfection processes for inactivation of Giardia and

C N Haas1, D Aturaliye

  • 1School of Environmental Science, Engineering and Policy, Drexel University, Philadelphia, PA 19104, USA. haascn@post.drexel.edu

Journal of Applied Microbiology
|July 2, 1999
PubMed
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Electroporation combined with chemical disinfectants significantly improved inactivation of Giardia cysts and Cryptosporidium oocysts. This offers a practical approach for water disinfection against resistant protozoa.

Area of Science:

  • Environmental microbiology
  • Water treatment technologies
  • Parasitology

Background:

  • Giardia cysts and Cryptosporidium oocysts are resistant protozoan pathogens causing waterborne diseases.
  • Conventional water disinfection methods may not fully inactivate these resilient organisms.
  • Advanced treatment strategies are needed to ensure water safety.

Purpose of the Study:

  • To evaluate the efficacy of electroporation alone and in combination with chemical disinfectants against Giardia cysts and Cryptosporidium oocysts.
  • To assess the synergistic effects of combined electrical and chemical treatments on pathogen inactivation.
  • To explore a potentially practical method for enhancing water disinfection processes.

Main Methods:

  • Electroporation was applied to Giardia cysts and Cryptosporidium oocysts.

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  • The viability of organisms was assessed after electroporation alone.
  • Organisms were treated with electroporation in combination with free chlorine, combined chlorine, hydrogen peroxide, and potassium permanganate.

    • Main Results:

    • Electroporation alone exhibited a minor impact on the survival of protozoan cysts and oocysts.
    • Combined treatment of electroporation with chemical agents demonstrated superior inactivation rates.
    • The most significant enhancements in inactivation were observed with combined chlorine, hydrogen peroxide, and potassium permanganate.

    Conclusions:

    • Combining electroporation with specific chemical disinfectants offers a promising strategy for enhanced inactivation of resistant protozoa.
    • This approach may provide a practical advancement for water disinfection processes targeting waterborne protozoan pathogens.
    • Further research into treatment kinetics and optimal combinations is warranted to refine this disinfection technique.