Miox : My Water. My World.

Microbial

Microbial Inactivation Efficacy

MIOX mixed oxidants have been proven in numerous laboratory studies to achieve more rapid and thorough inactivation of a wider range of microbial contaminants than conventional chlorine. Mixed oxidants usually are several orders of magnitude more effective in microbial contaminant inactivation than conventional chlorine, achieving up to 2 logs higher inactivation of even extremely resistant organisms.

As point-in-fact, the MSR MIOX Purifier has passed the Environmental Protection Agency’s (EPA’s) Guide Standard and Protocol for Microbiological Purifiers, achieving more than the required inactivation level for viruses, bacteria, and protozoan cysts in both clean and dirty waters. In the protozoa category, the purifier was tested against both Giardia and Cryptosporidium.  Although the EPA does not currently grant CT (Concentration x Time) credits for mixed-oxidant inactivation of Cryptosporidium in municipal applications, the mixed-oxidant solution was shown to achieve at least a 99.99 percent (4 log) inactivation at drinking water dose levels, in contrast to no inactivation whatsoever with conventional chlorine.

Mixed oxidants have been successfully tested against a variety of microorganisms, including several different biological weapons agents, such as:

• Bacillus anthracis (anthrax)
• Bacillus cereus
• Bacillus stearothermophilus
• Bacillus subtilis spore
• Bacteriophage (F2)
• Clostridium perfringens spore
• Coliphage MS2

Cryptosporidium parvum oocyst*
• Escherichia coli
• Francisella tularensis
• Giardia lamblia cyst
• Giardia muris cyst
• Hepatitus A virus (HAV)
• Hepatitus virus analog (F2)
• Klebsiella terrigena
• Legionella pneumophila
• Listeria monocytogenes
• Pseudomonas aeruginosa
• Salmonella typhimurium
• Staphylococcus aureus
• Vaccinia virus (smallpox)
• Vibrio cholerae
• Yersinia pestis (plague)

* The EPA does not grant CT credits for Cryptosporidium inactivation with mixed oxidants, and in reality, required dose levels and contact times are likely too high for most municipal applications.  However, laboratory studies do show a significant performance difference at the same doses (5 mg/L) and contact times (4 hours), with mixed oxidants achieving 3 to 4 log inactivation and conventional chlorine achieving no inactivation whatsoever.