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Assessment of a Novel Photocatalytic TiO<sub>2</sub>-Zirconia Ultrafiltration Membrane and Combination with Solar Photo-Fenton Tertiary Treatment of Urban Wastewater
oleh: Dennis Deemter, Fabricio Eduardo Bortot Coelho, Isabel Oller, Sixto Malato, Ana M. Amat
Format: | Article |
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Diterbitkan: | MDPI AG 2022-05-01 |
Deskripsi
The objective of this study was to assess the combination of a photocatalytic TiO<sub>2</sub>-coated ZrO<sub>2</sub> UF membrane with solar photo-Fenton treatment at circumneutral pH for the filtration and treatment of urban wastewater treatment plant (UWWTP) effluents. Photocatalytic self-cleaning properties were tested with a UWWTP effluent under irradiation in a solar simulator. Then, both the permeates and retentates from the membrane process were treated using the solar photo-Fenton treatment. The UWWTP effluent was spiked with caffeine (CAF), imidacloprid (IMI), thiacloprid (THI), carbamazepine (CBZ) and diclofenac (DCF) at an initial concentration of 100 µg/L each. Retention on the membrane of <i>Pseudomonas Aeruginosa (P. Aeruginosa)</i>, a Gram-negative bacterial strain, was tested with and without irradiation. It was demonstrated that filtration of a certain volume of UWWTP effluent in the dark is possible, and the original conditions can then be recovered after illumination. The photocatalytic membrane significantly reduces the turbidity of the UWWTP effluent, significantly increasing the degradation efficiency of the subsequent solar photo-Fenton treatment. The results showed that the membrane allowed consistent retention of <i>P. Aeruginosa</i> at an order of magnitude of 1 × 10<sup>3</sup>–1 × 10<sup>4</sup> CFU/mL.