Leman lake

In this section, the behavior of an E. coli suspension during the subsequent dark period is discussed in order to estimate the potential of using the solar (photocatalytic) treatment process in real water disinfection situations. Photocatalytic disinfection at field scale is illustrated using water from the Leman Lake (LLW). Other aspects when using a pilot reactor such as dose, circulation rate and catalyst concentrations are discussed. 

Fig. 17.8 Inactivation of E. coli by sunlight in the presence of Ti02 in CPC photoreactor. The insert contains the UV (continuous line) and total (dashed line) solar irradiation measured during the period of the experiment. 27th September 2003 in Lausanne, Switzerland. Dark control for samples that corresponds to 0, 1, 2, and 3h of the illumination exposure. Conditions Ti02 = 0.02 g L 1, Ptot = 35 L, recirculation rate = 20.5 L min-1, illumination time = 3 h. Water from Leman lake. The bars show the SD of four samples taken at the same moment. Initial concentration 105 CFUmL-1...

Regarding Diphyllobothrium tapeworms, an increased number of human cases of diphyllobothriasis due to Diphyllobothrium latum was recorded in Europe 48 new cases in France and Switzerland in 2001-2002, contracted by consuming freshwater fish from Leman lake (Dupouy-Camet and Peduzzi 2004 AFSSA 2004). Also, the consumption of seawater fish contaminated with plerocercoid larvae of marine Diphyllobothrium species (Chai et al. 2005) led to human diphyllobothriasis. For instance, D. pacificum (from sea-lions) infects humans in coastal zones of Chile,... 

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