Post-treatment of biologically treated wastewater containing organic contaminants using a sequence of H2O2 based advanced oxidation processes: Photolysis and catalytic wet oxidation
作者： J.J. Rueda-Márquez , M. Sillanpää , P. Pocostales , A. Acevedo , M.A. Manzano
DOI: 10.1016/J.WATRES.2014.12.054
关键词:
摘要: In this paper the feasibility of a multi-barrier treatment (MBT) for regeneration synthetic industrial wastewater (SIWW) was evaluated. Industrial pollutants (orange II, phenol, 4-chlorophenol and phenanthrene) were added to effluent municipal plant. The proposed MBT begins with microfiltration membrane pretreatment (MF), followed by hydrogen peroxide photolysis (H2O2/UVC) finishing, as polishing step, catalytic wet oxidation (CWPO) using granular activated carbon (GAC) at ambient conditions. During step (0.7 μm) decrease suspended solids concentration, turbidity Escherichia coli in treated water 88, 94 99%, respectively. Also, effluent's transmittance (254 nm) increased 14.7%. Removal more than 99.9% all pollutants, mineralization 63% organic compounds complete disinfection total coliforms reached during H2O2/UVC (H2O2:TOC w/w ratio = 5 an UVC average dose accumulated 8.80 WUVC s cm(-2)). power efficiency lamp, photoreactor geometry are taken into account new equation estimate is suggested. Remaining higher state atoms (+0.47) toxic concentration residual H2O2 present process. After 2.3 min contact time GAC CWPO 90 100% removed, toxicity studied Vibrio fischeri Sparus aurata larvae. operational maintenance costs (O&M) estimated be 0.59 € m(-3).
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