Microorganisms (for example fungus, viruses, bacteria and parasites) can be found in different forms in water and the environment and although they are sometimes essential, they can also act as pathogens (disease-causers). Deactivation generally results from water chlorination. However, chlorination can be insufficient against resistant microorganisms like cryptosporidium parvum. The total germ count, pseudomonas aeruginosa, E. coli, coliforms and legionella pneumophila are indicator organisms used to estimate the hygienic situation. The solution (elimination or deactivation) must be based on the consideration of individual cases. Viruses, bacteria and other microorganisms have either a positive or negative charge and become removable with optimized flocculation. Deactivation is possible with chlorine within the stipulated destruction time - depending on the organism.
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