Integration of Solar Photocatalysis and Membrane Bioreactor for Pesticides Degradation

Abstract

Wastewater containing recalcitrant contaminants as pesticides can be treated by a coupled system which consists of a solar photo-Fenton pretreatment followed by a biological oxidation process. Membrane bioreactor technology (MBR) is particularly suitable for advanced biological treatment of wastewater containing biorecalcitrant compounds and shows a variety of advantages that make it a good alternative to be coupled with photo-Fenton, especially for water reclamation. In this sense, there is a lack of research about the integration of the photo-Fenton oxidation process with biodegradation in MBR. The aim of this work is to demonstrate the viability of the coupled system to treat toxic wastewater containing pesticides. The effluent obtained in the coupled system was high quality water ready to reuse, with low residual DOC concentration, absence of pesticides, absence of solids, and low turbidity values. The present study confirms that the combination of solar photo-Fenton and membrane bioreactors is an effective approach for the treatment of wastewaters polluted with pesticides, achieving carbon removal percentages higher than 95%.

Advanced catalytic oxidation coupled to biological systems to treat pesticide-contaminated water: A review on technological trends and future challenges

“…Thus, the coupling between Photo-Fenton processes and MBR for the decontamination of wastewater containing pesticides arises as (López et al 2010) who corroborate the toxic conditions and low biodegradability of these effluents, in this case, a mixture of 5 commercial pesticides, utilizing the tests described in Table 1. Likewise, chemical oxidation allows the pesticide molecules to be attacked with hydroxyl radicals which give rise to organic intermediates, but without a strong decrease in DOC concentration.…”

“…Research by (López et al 2010;Cabrera Reina et al 2015) determined as the main result of the coupled treatment is highquality water with reuse conditions. This evidences a gap in the scientific field oriented towards the lack of research regarding this type of objectives, taking as a starting point that it is in the interest of industries to reduce excessive water and energy consumption, together with the operating costs of wastewater treatment and in synergy with the reduction of the environmental impacts associated with their different productive activities, as specified by (Rosa et al 2020).…”

“…It should be noted that the acclimatization time of the biological process mediated in the MBR (López et al 2010) results in good stability of the treatment system since the operating conditions, transmembrane pressure, aeration conditions, flow, and aerator design, were adequate for the biological conditions, which is evident in the quality of the treated water at the end of the coupling process.…”

Green technology in wastewater treatment technologies: Integration of membrane bioreactor with various wastewater treatment systems

“…This study found out that MBR-ozonation system gave results comparable to those obtained by the two separated treatment systems. In contrast, López, et al[20] studied the integration of solar photo catalysis followed by MBR for pesticide degradation. The permeate obtained in the coupled system was ready-to-use high quality water, with the absence of pesticides, recirculation stream of the MBR.…”

Φωτοκαταλυτική Διάσπαση Οργανικών Ρύπων Προτεραιότητας Σε Υδατικά Συστήματα

“…ηζξ πενζζζυηενεξ πενζπηχζεζξ, δ επελενβαζία πενζθαιαάκεζ έκα ζηάδζμ πνμηαηενβαζίαξ ιε Π.Ο.Μ.Α., ιε ζηυπμ ηδκ ιεηαηνμπή ηςκ νφπςκ ζε πενζζζυηενμ αζμαπμδμιήζζιεξ εκχζεζξ, μζ μπμίεξ ζηδ ζοκέπεζα οθίζηακηαζ αζμθμβζηή επελενβαζία πνμηεζιέκμο κα επζηεοπεεί πθήνδξ δζάζπαζδ ημοξ ζημ ζοκημιυηενμ πνμκζηυ δζάζηδια ηαζ ιε ημ ιζηνυηενμ ηυζημξ (Sarria et al, 2003;Mantzavinos and Psillakis, 200;Casas López et al, 2010 (Amat et al, 2003(Amat et al, , 2007Sirtori et al, 2009;Radjenovic et al, 2009 (Oller et al, 2011). Χξ δείηηεξ βζα ηδκ εηηίιδζδ ηδξ απμηεθεζιαηζηυηδηαξ ηδξ πδιζηήξ μλείδςζδξ πνδζζιμπμζμφκηαζ εονφηαηα μζ ζοβηεκηνχζεζξ ημο μθζημφ μνβακζημφ άκεναηα (Total Organic Carbon) ηαζ ημο πδιζηά απαζημφιεκμο μλοβυκμο (Chemical Oxygen Demand) (Oller et al, 2011).…”