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A pulsed discharge in water was applied to inactivate Cryptosporidium parvum (C. parvum) in filter backwash water from a water purification plant. Effects of water quality and discharge conditions on the degree of inactivation were investigated by batch experiments. A high inactivation ratio (> 99%) was obtained under conditions of low turbidity and high total energy. In 10L backwash water of turbidity 40, 98% of oocysts were inactivated by applying a total energy of 17520 J for 10L (1752 J/L). Experimental results suggest that UV emission is mainly effective for inactivation.
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Obo et al. (2004) studied this question.
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