Abstract:
The treatability of high-strength landfill leachate is challenging and relatively limited. This study examines the feasibility of treating high-strength landfill leachate (chemical oxygen demand [COD]: 7,760-11,770 mg-L, biochemical oxygen demand [BOD5]: 2,760-3,569 mg-L, total nitrogen [TN] = 980-1,160 mg-L) using a sequencing batch reactor (SBR) preceded by a coagulation-flocculation process with phosphorus nutritional balance under various mixing and aeration patterns. Simulations were also conducted to define kinetic parameters and COD fractionation. Removal efficiencies reached 89percent for BOD5, 60percent for COD, and 72percent for TN, similar to and better than reported studies, albeit with a relatively lower hydraulic retention time (HRT) and solid retention time (SRT). The coupled experimental and simulation results contribute in filling a gap toward managing highstrength landfill leachate and providing guidelines for corresponding SBR applications. Copyright © 2013 Aandamp;WMA.