Degradation of landfill leachate using transpiring-wall supercritical water oxidation (SCWO) reactor.
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 (t(ind)) effect. The resulting pre-exponential factor A and activation energy E(a) 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.
Gong
Weijin
W
College of Energy and Environmental Engineering, 41 Zhongyuan Road, Zhongyuan University of Technology, Zhengzhou 410000, Henan, China. hggwj@yahoo.com.cn
Duan
Xuejun
X
D002244:Carbon / Q000737:chemistry; D004867:Equipment Design; D007700:Kinetics; D009584:Nitrogen / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D011312:Pressure; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D014872:Water Movements; D018508:Water Purification / Q000379:methods*
D016877:Oxidants; D014867:Water; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen