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Investigation of the contribution of advanced oxidation processes in the multi-barrier treatment of biotreated effluents

Grant number: 19/26210-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): October 01, 2020
Effective date (End): September 30, 2022
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal Investigator:Renato Falcão Dantas
Grantee:Rodrigo Pereira Cavalcante
Home Institution: Faculdade de Tecnologia (FT). Universidade Estadual de Campinas (UNICAMP). Limeira , SP, Brazil
Associated research grant:14/17774-1 - Influence of the secondary effluent composition on the disinfection by advanced oxidation processes, AP.JP

Abstract

Water reuse has emerged as an important alternative to solve water scarcity problems. Biologically treated effluents contain a high amount of dissolved organic matter, which consists of a heterogeneous mixture of organic compounds that may also contain emerging contaminants. Consequently, to ensure adequate water quality for reuse, it is of paramount importance to develop new forms of treatment that are efficient, since conventional wastewater treatment cannot promote the removal of emerging contaminants. In this context, seeking a contribution to solve this problem, the present project proposes to apply several multi-barrier methods (MB) for polish effluents. The proposed multi-barrier methods consist of two-stages Advanced Oxidative Processes (AOPs) with biofiltration by biological activated carbon (BAC). The first AOP will serve as a pre-treatment for biofiltration and the second AOP will serve as a post-biofiltration finishing step to ensure disinfection and removal of microcontaminants, being: alachlor, atrazine, carbofuran, metolachlor and molinate. The combination of AOPs in MB systems produces promising results, however little is known about the effective role of AOPs in these systems. In this sense, this project aims to investigate the role of AOPs, with emphasis on ozone and UV/H2O2 based processes and their combinations in MB coupled systems. The four MB configurations studied to verify the role of POAs in each step will be: (i) O3-BAC-O3, (ii) O3/H2O2-BAC-O3/H2O2, (iii) UV/H2O2-BAC-UV/H2O2, (iv) [O3/ H2O2 or O3]-BAC-UV/H2O2/UF. (AU)