A novel extractive membrane bioreactor for treating biorefractory organic pollutants in the presence of high concentrations of inorganics: application to a synthetic acidic effluent containing high concentrations of chlorophenol and salt

摘要

Traditional bioprocesses have difficulties treating biorefractory organic pollutants in waste streams that contain high con- centrations of inorganics. A novel hybrid process, combining liquid-liquid extraction and a membrane bioreactor, has been designed to treat such an effluent. To demonstrate the viability of this process, a synthetic wastewater was designed to rep- resent the sort of effluent that often results from the speciality organic chemicals sector. This model effluent contains high concentrations of chlorophenols (CPs) (1000mgl~-1), salts (15/100 w/w) and has a pH of less than l. Experimental work was combined with process design to9 estimate the likely treatment costs for such an effluent. The proposed treatment process has three advantages.