Abstract
A comparison of effectiveness of two advanced oxidation processes, photocatalysis and ultraviolet (UV) irradiation enhanced with H2O2 addition, coupled with ultrafiltration (UF) for treatment of secondary effluent (SE) from a municipal wastewater treatment plant (WWTP) is presented. The results were compared with photolysis – UF system. The concentration of H2O2 in the UV/H2O2 – UF mode ranged from 0.03 to 0.3g/L, the photocatalyst TiO2 P25 loading was changed from 0.5 to 2g/L. A ceramic membrane with ZrO2 separation layer was used. No significant influence of photocatalyst or H2O2 concentration on permeate flux was observed, however, both PMR (photocatalytic membrane reactor) and UV/H2O2 – UF systems were less prone to fouling than the photolysis – UF one. Adsorption was found to be an important stage of total organic carbon (TOC) removal in PMR, while UF contributed mainly to photocatalyst rejection with minor effect on the overall treatment efficiency. The highest TOC removal of organic contaminants after 5h of operation was found at 1.5 gTiO2/L in PMR (61%) and 0.15 gH2O2/L in UV/H2O2 – UF process (65%). The quality of permeate obtained in both systems was comparable, the product of the latter one exhibited lower ecotoxicity towards crustaceans Thamnocephalus platyurus than the PMR permeate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Chemical Engineering and Processing - Process Intensification
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
