دانلود رایگان مقاله بررسی عددی و تجربی ضد عفونی UV برای تصفیه آب

Abstract

Disinfection by ultraviolet (UV) for water treatment in a UV reactor is numerically and experimentally investigated in this paper. The flow of water, UV radiation transportation as well as microorganism particle trajectories in the UV reactor is simulated. The effects of different parameters including UV transmittance (UVT), lamp power and water flow rate on the UV dose distribution and average UV dose are studied. The UV reactor performance in terms of average UV dose under these parameters is analysed. Comparisons are made between experiments and simulations on the average UV dose and reasonable agreement is achieved. The results show that the fluence rate increases exponentially with the increase of UVT. The UV dose distribution profiles moves to a high range of UV dose with the increase of UVT and lamp power. The increase of water flow rate reduces the average exposure time of microorganism particles to the UV light, resulting in the shifting of UV dose distribution to a low range of UV dose. A linear relationship is observed between fluence rate and the average UV dose. The average UV dose increases with the increase of lamp power while it decreases with the increase of UVT and water flow rate.

5. Concluding

remarks UV disinfection for water treatment in a UV reactor is studied in this paper. The effects of different parameters including UVT, lamp power and fluid flow rates on the UV dose distribution as well as the average UV dose are thoroughly investigated combined experimental and numerical study. Comparisons between numerical and experimental results under these parameters show reasonable agreement. The results of these critical parameters studied on the UV reactor performance in this paper can provide useful insights for the designing of an efficient UV reactor. With the numerical model validated, it can be used as guidelines for designing and evaluation of other scaled UV reactors without further experimentation. This could save time and money substantially in replication of the experimental tests for the company.