Best Legionella remediation and Biofilm penetration
Despite of the low cost of Chlorine and Chlorine Dioxide the best choice is
Monochloramine for Legionella remediation.
Best Legionella remediation
Let’s compare the most common disinfectants:
Chlorine: high use costs due to its pH-dependency, corrosivity and stability.
Chlorine Dioxide: several drawbacks that limit its application (high risk in transportation and storage)
Monochloramine: electron sharing, stability, pH and ORP functions, biofilm penetration ability and decay pathways.
Biofilm penetration: monochloramine does it better
Thanks to its stability, SANIKILL monochloramine is the only disinfectant that can penetrate the biofilm which is where bacteria grow. Better biofilm penetration also means lower chemical consumption resulting in operating costs reduction.
This is the published demostration of the superior ability of the monochloramine to penetrate biofilm.
In order to achieve a successful disinfection, the disinfectant must get rid not only of the bacteria floating within the water stream (planktonic bacteria) but also the bacteria that grow and colonize underneath the biofilm in the pipes. A recent study about SANIKILL monochloramine published by the US-EPA demonstrated that thanks to the ability of penetrating the biofilm, SANIKILL monochloramine was able to reduce Legionella and other harmful waterborne pathogens colonization into a hospital building water system. You can see the scientific peer-reviewed paper here (https://doi.org/10.1016/j.watres.2020.116656)
Higher biofilm penetration means no wasted chemicals. In order to achieve the same biofilm penetration chlorine or chlorine dioxide must be added in higher concentration since it is consumed by the external biofilm layers.
Higher chemical dosed, much of it wasted, means higher costs of treatment.
In the case of chlorine, the remaining part of it is not just waste, it is a strong oxidizer (hypochlorite ion) added to piped water. That means metal corrosion.