Abstract
The flow, radiation intensity and concentration of microorganisms in three UV reactors are simulated using an integrated mathematical model for UV disinfection. All governing equations are solved using the commercial CFD software ANSYS Fluent. The effect of internal configuration on the disinfection level in the reactor is discussed in detail. There exists a relatively strong recirculation in the lower part of the U-type reactor. The two baffled reactors improve the mixing of microorganisms. The longitudinal baffled reactor can achieve the highest disinfection level. It is recommended that the arrangement of baffle should produce a longer flow path.
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