Release Time:2019-11-04  Hits:

Indexed by: Journal Papers

Date of Publication: 2019-09-01

Journal: WATER ENVIRONMENT RESEARCH

Included Journals: PubMed、EI、SCIE

Volume: 91

Issue: 9

Page Number: 918-925

ISSN: 1061-4303

Key Words: continuous-flowing reactor; degradation; disinfection; double helical module; photocatalysis

Abstract: A double-helical photocatalytic module was fabricated via an annealing process following an anodic oxidation procedure, and installed into a commercial UV sterilizer to structure continuous-flow photocatalytic device. Benefiting from the superior mass transfer of double-helical structure to common flat plate or corrugated plate, as well as the improved adhesion between Ti support and TiO2 layer, the photocatalytic device displayed potential in practical disinfection and degradation of organics. During photocatalytic disinfection process with 21 mJ/cm(2) of UV dose, the concentration of Escherichia coli decreased from 1.71 x 10(7) CFU/L (typical for municipal wastewater) in influent to 2,720 CFU/L in effluent water, which met the wastewater discharged standard of China. Escherichia coil reactivation ratio for the photocatalytic device was only one-tenth of that for UV sterilizer. Furthermore, taking phenol, bisphenol A, and four antibiotics as targets, the device was demonstrated to promote the degradation of photodegradable pollutants via photocatalysis. These results highlight a feasibility of photocatalytic technology as a supporting role in practical wastewater treatment. (C) 2019 Water Environment Federation