In previous study, the two-stage MBR is utilizing inclined-platese parator in first stage anoxic reactor and followed by an aero-bic reactor with a submerged membrane module for solid–liquid separation which have been developed and successfully applied tolow and high strength waste water including municipal solid waste leachate [14,15]. At the first stage reactor, highly concentrated sludge is maintained through incline plate separation and secondstage of aerobic reactor is operated at appropriate biomass concen-trations for controlling membrane fouling whilst whole system isoperated at high organic loading rate. The system can be appliedin practice in the treatment of wastewater with their characteris-tics fluctuated greatly with time [12,15]. The advantages of MBRsystems are including maintaining high performance, low oper-ating cost and simplicity of operation without removal of excess sludge. In particular, its efficiency in removing contaminants ofemerging which is presented with low concentration levels of g/lmainly depended on the properties of compounds and operatingconditions of the treatment system, e.g. biomass concentration,hydraulic retention time and pH. In previous study, the adsorp-tion and biodegradation had been reported as the main removal mechanisms of these emerging contaminants in this new MBRtreatment system for municipal solid waste leachate [12]. However,the removal efficiencies of emerging contaminants by microbialsludge operated in long term and the analyses of emerging contam-inant removal kinetics have not yet been performed. Therefore, the main objectives of this study are to investigate long-term fate of emerging contaminants in MBR system and determination of their maximum