Journal
CATALYSTS
Volume 12, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/catal12050552
Keywords
advanced oxidation processes; bacteria retention; photocatalytic membranes; photo-induced super-hydrophilicity; titania; ZrO2
Categories
Funding
- European Union's Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie Grant [765860]
- Spanish Ministry of Science, Innovation and Universities (MCIU) [RTI2018-097997-B-C32, RTI2018-097997-B-C31]
- FEDER [RTI2018-097997-B-C32, RTI2018-097997-B-C31]
- AEI [RTI2018-097997-B-C32, RTI2018-097997-B-C31]
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This study assessed the combination of a photocatalytic membrane and solar photo-Fenton treatment for the filtration and treatment of urban wastewater. The results showed that the photocatalytic membrane significantly reduces turbidity and improves degradation efficiency.
The objective of this study was to assess the combination of a photocatalytic TiO2-coated ZrO2 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 mu g/L each. Retention on the membrane of Pseudomonas Aeruginosa (P. Aeruginosa), 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 P. Aeruginosa at an order of magnitude of 1 x 10(3)-1 x 10(4) CFU/mL.
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