Colour removal from a nitration effluent using ozonation

点击翻译按钮获取中文摘要

Ozonation is an effective process for the degradation of colour residues that are recalcitrant to biologicaltreatment in industrial effluents. A major advantage of ozonation is that, it generally does not generate anyadditional waste streams that require further treatment (for example filtration does so). The selectivity of ozonetowards coloured and recalcitrant compounds, however, is dependent on characteristics of the effluent. This isespecially of importance because ozone should not be used to treat organics that are easily biodegradable andcan be removed via conventional biological processes. Hence, a thorough laboratory-scale assessment ofefficiency of ozonation in selective removal of recalcitrant compounds from a coloured effluent is required tounderstand the advantages and limitations of this technology and to draw economic conclusions on itscommercial-scale application.This research is initiated by the University of British Columbia (UBC) and involves active participation of BCResearch Inc. (BCRI). The main objective of this project is to research efficiency of ozonation for the removalof residual colour from an effluent produced in the mono-nitrobenzene production process.The first and second stages of the project will involve identification of the important process parameters anddesign of a test plan to study the effect of each parameter on colour removal efficiency. The third stage willexecute the designed test plan in a lab-scale ozone contactor, which is available in our laboratory, anddetermination of the kinetics of the oxidation process, and identification of the importance of differentparameters. The last stage will focus on testing the optimum operating parameters in a larger scaleflow-through ozonation unit, which is also available in our laboratory.