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Disinfection of Water, Electrochemical


Disinfection is the killing of vegetative microorganisms. Accepted methods must be able to reduce microorganisms by at least 5 orders of magnitude. Electrochemical water disinfection is one of these methods [1]. ECD acts by means of electrochemical disinfectant generation onsite or inline (Fig. 1). Besides the disinfection effect, benefit of ECD arises from relatively simple cell construction and easy automation.

Figure 1. Onsite (A) and inline addition (B) of disinfectants to water.


The method must be distinguished from the killing or inactivation of microorganisms previously adhered to a surface (biofilm at different stages) by applying electrochemical surface polarization and from electroporation technologies working with field strength up to 10 MV m-1. Whereas direct electron transfer seems to exist for adhered microorganisms [2], oxidant production is the most probable