|تعداد مشاهده مقاله||103,793,489|
|تعداد دریافت فایل اصل مقاله||81,532,062|
Disinfection of biologically treated wastewater using photocatalysis process with artificial UV light and natural Solar radiation
|دوره 9، شماره 1، فروردین 2023، صفحه 332-343 اصل مقاله (745.97 K)|
|نوع مقاله: Original Research Paper|
|شناسه دیجیتال (DOI): 10.22059/poll.2022.347229.1575|
|Salam K. Al- Dawery1؛ Sreedhar Reddy 2؛ Khaloud Al-Mashrafiya1؛ Buthina Al-Fraji1؛ Muataz Salam Al-Daweri3|
|1Department of Chemical Engineering, College of Engineering and Architecture, University of Nizwa, Nizwa, Sultanate of Oman|
|2Department of Civil and Environmental Engineering, College of Engineering and Architecture, University of Nizwa, Nizwa, Sultanate of Oman|
|3Xiamen University, Malaysia|
|The goal of this research was to investigate the efficacy photocatalysis with natural solar radiation and artificial UV radiation for disinfecting total coliforms in biologically treated wastewater. The effect of TiO2 dosage and irradiation time on total coliform inactivation as measured by log reduction values (LRV), removal of BOD, COD, turbidity, and effluent properties as measured by pH and conductivity was investigated. Two sets of experimental equipment were constructed, one for using solar UV light and the other for using artificial UV light. After four hours of irradiation with 60 mg/L TiO2, photocatalysis achieved LRVs of 1.4 and 1, respectively, under UV and solar radiation. COD and BOD were reduced by 67% and 50% respectively under UV and solar radiation after two hours of irradiation with 60 mg/L TiO2. Turbidity was reduced by 71%. Both conductivity and acidity of the effluent were reduced as TiO2 concentration was increased. Photocatalysis with natural solar radiation produced disinfection results that were comparable to that of efficient UV light exposure. Artificial UV light and natural solar radiation can be combined in photocatalysis process to form a hybrid process.|
|Log reduction values Titanium dioxide؛ Photo-oxidation؛ Wastewater؛ COD؛ BOD|
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