Greywater treatment by anodic oxidation, photoelectro-Fenton and solar photoelectro-Fenton processes: Influence of relevant parameters and toxicity evolution

In this study, the applicability of factorial design to treatment greywater (GW) containing dodecyl-benzene sulfonic acid (LAS) by electrochemical advanced oxidation processes (EAOPs) is demonstrated. At bench scale, anodic with electrogenerated H2O2 (AO-H2O2) and photoelectro Fenton (PEF) were studied following a 23 central point insertion, using first-order mathematical polynomial. former process, combination boron-doped diamond (BDD) anode carbon-PTFE air-diffusion cathode, both 3 cm2, yielded 76% degradation LAS at 40 mg L−1 along 52% TOC removal under optimized conditions. The PEF process 5 Fe2+ current density 77.5 mA cm−2 allowed attaining 63% 78% abatement. best conditions found for according design, in terms concentration density, applied 10 L raw GW solar (SPEF) compound parabolic collector (CPC) as reactor filter-press cell. A 70% 55% mineralization attained after 240 min treatment. Artemia salina toxicity tests performed effluents resulting from different methods optimum conditions, SPEF was proven be most effective promising EAOP reduction toxicity.