Ozone-based advanced oxidation of biologically treated landfill leachate: Oxidation efficiency, mechanisms, and surrogate-based monitoring for bulk organics

Surrogate-based follow-up of activated carbon adsorption preceded by ozonation for removal of bulk organics and micropollutants from landfill leachate

“…The pH and conductivity were measured using a Hach HQ 40d multimeter equipped with pH and conductivity sensors. The molecular weight (MW) distribution of leachate organics was determined using a membrane filtration method described by (Yang et al, 2021b). Briefly, a 5 mL leachate sample was filtrated by a cut-off ultra-filtration membrane device (3 kDa, Macrosep® Advance, Pall.com) (Yang et al, 2021d).…”

“…The protein-like component C4 was excluded for analysis because the removal of C4 was always higher than 98% (data not shown). The well adsorbable character and possible biodegradation of C4 (Yang et al, 2021d) by ozonation (Park et al, 2017;Wang et al, 2020;Yang et al, 2021b). Sgroi et al (2018), however, proposed a simple linear correlation between surrogate and MPs removal for predicting breakthrough during column adsorption of MPs in municipal wastewater.…”

“…For the last few decades, landfilling has been one of the main methods for the disposal of municipal solid waste (MSW) in the world (Gautam and Kumar, 2021;Nanda and Berruti, 2020;Yang et al, 2021a). One of the main concerns for this application is the generation of landfill leachate, which contains various types of organic and inorganic pollutants (Gao et al, 2015).…”

“…A recent study suggests that the percentage removal of some fluorescent surrogates exhibit a linear correlation with MPs removal during column adsorption of surface water and municipal wastewater (Sgroi et al, 2018). In contrast, several studies indicate that the relationship between MPs elimination and surrogate changes may be nonlinear, due to different removal kinetics between MPs and surrogates (Wang et al, 2020;Yang et al, 2021a). Next to that, the study of Sgroi et al (2018) also highlights a potential barrier for surrogate application, namely that the fitting parameters of the linear correlation models may change due to variations in the water characteristics.…”

Advanced treatment of landfill leachate through combined Anammox-based biotreatment, O3/H2O2 oxidation, and activated carbon adsorption: technical performance, surrogate-based control strategy, and operational cost analysis

“…Ozone-based advanced oxidation (O 3 AOP, e.g. stand-alone O 3 , O 3 /H 2 O 2, and O 3 /UV processes) is another widely investigated leachate treatment technology because of its ability to oxidize large organic molecules to smaller and more biodegradable molecules or even to their highest stable oxidation state (carbon dioxide) (Yang et al, 2021;Wang et al, 2016Wang et al, , 2017. The oxidized leachate organics could be removed more easily in a subsequent process via (GAC) adsorption or biodegradation (J.…”