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The use of ultraviolet (UV) disinfection devices has become increasingly popular in wastewater and aquaculture industries.Although the effectiveness of UV disinfection has been well documented for flow through operation regimes in wastewater treatment, research focusing on water recirculating systems is still limited.In this study, the performance of single-lamp UV devices were tested on a recirculating system for fecal coliform (FC) disinfection.Experimental results indicated that UV power input, recirculating flow rate and water UV transmittance were three important factors determining UV disinfection efficiency.An UV disinfection model for a recirculating system was developed based on theoretical analysis and experimental data.A key model parameter, namely the first-order inactivation rate constant (k), was determined to be 0.0062 m 2 J-1 for FC disinfection.
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Zhu et al. (2002) studied this question.
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