Remediation of a winery wastewater combining aerobic biological oxidation and electrochemical advanced oxidation processes

Water Research
Francisca C MoreiraVítor J P Vilar

Abstract

Apart from a high biodegradable fraction consisting of organic acids, sugars and alcohols, winery wastewaters exhibit a recalcitrant fraction containing high-molecular-weight compounds as polyphenols, tannins and lignins. In this context, a winery wastewater was firstly subjected to a biological oxidation to mineralize the biodegradable fraction and afterwards an electrochemical advanced oxidation process (EAOP) was applied in order to mineralize the refractory molecules or transform them into simpler ones that can be further biodegraded. The biological oxidation led to above 97% removals of dissolved organic carbon (DOC), chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5), but was inefficient on the degradation of a bioresistant fraction corresponding to 130 mg L(-1) of DOC, 380 mg O2 L(-1) of COD and 8.2 mg caffeic acid equivalent L(-1) of total dissolved polyphenols. Various EAOPs such as anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF), UVA photoelectro-Fenton (PEF) and solar PEF (SPEF) were then applied to the recalcitrant effluent fraction using a 2.2 L lab-scale flow plant containing an electrochemical cell equipped with a boron-doped diamond (BDD) anode and a carbon-PTFE ai...Continue Reading

References

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Citations

Oct 4, 2020·Environmental Science and Pollution Research International·Jesús Castillo-MonroyArturo Estrada-Vargas
Oct 8, 2018·Applied Microbiology and Biotechnology·Valeria PrigioneGiovanna Cristina Varese
Sep 25, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hao LiHua Li
Nov 18, 2018·Chemical Society Reviews·Nianjun YangXin Jiang
Aug 15, 2017·Environmental Science and Pollution Research International·Jorge Rodríguez-ChuecaJosé A Peres
Jun 29, 2021·The Science of the Total Environment·Matia MainardisDaniele Goi

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