This research focused on the source of the membrane-fouling change in the combined system of a biological contact oxidation reactor and a membrane bioreactor(BCOR-MBR) treating brine wastewater. Fluorescence excitation emission matrix(EEM) spectroscopy was used to study the impact of the biological contact oxidation process on the characteristics of soluble microbial products under different salinity shocks in the BCORMBR system. There were three peaks in the EEM spectra of MBR-1 and MBR-2. The humic acid-l...