Degradation of landfill leachate using transpiring-wall supercritical water oxidation (SCWO) reactor |
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| Authors: | Weijin Gong Xuejun Duan |
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| Institution: | 1. Department of Environmental Engineering, Faculty of Construction, Yildiz Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey;2. Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey |
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| Abstract: | Oxidation of landfill leachate wastewater was studied in a transpiring-wall SCWO reactor, operated under varied temperature and pressure 320–430 °C, 18–30 MPa. Effect of temperature and pressure on COD and BOD removal efficiency was investigated. COD and BOD removal efficiency being 99.23%, 98.06% were achieved at 430 °C, 30 MPa, which increased with temperature and pressure. The modified pseudo first-order rate model was regressed from experimental data, taking into account the induction time (tind) effect. The resulting pre-exponential factor A and activation energy Ea were 34.86 s?1 and 32.1 kJ mol?1, respectively, assuming that the reaction order for feed wastewater (based on COD) and oxidant were first order and zero order, respectively. |
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