Ozonation of biologically treated landfill leachate: efficiency and insights in organic conversions

A comparative study on the efficiency of ozonation and coagulation–flocculation as pretreatment to activated carbon adsorption of biologically stabilized landfill leachate

“…As the initial leachate COD increases, the percentage COD removal efficiency decreases. This is in agreement with the trend reported by Chys et al (2015b). For instance, after 60 min of ozonation, 44% COD reduction was achieved at an initial COD concentration of 112 mg/L while only 5% COD removal was obtained at 1846 mg/L.…”

Impact of Salinity on Stabilized Leachate Treatment from Ozonation Process

“…Applying ozonation at a high leachate pH of 9.4 will most probably lead to a faster ozonation decomposition, therefore a significant enhancement of HO* production which is a more reactive compared to ozone itself, maybe achieved [19]. It is possible that at lower pH, organic pollutants are shifted toward their non-ionized forms.…”

Successful Landfill Leachate Wastewater Treatment Using the Sequence of Ozonation, Adsorption on Charcoal and Photo-Ozonolysis

“…Among the solutions for the treatment of landfill leachate, the ozone treatment was proposed by numerous authors. [7][8][9][10][11][12][13][14][15][16][17][18] Initially it was mainly proposed as the stabilizer of the leachate properties, 13 but later it was recognized the benefits of ozonation (or other oxidation processes) to facilitate the biological treatment. 8 The fact that landfill leachate is composed by refractory organic matter led the researchers to apply a series of advanced oxidation processes in its treatment.…”