Colour removal from a nitration effluent using ozonation

臭氧氧化是降解工业废水中难生物处理的色度残留物的有效方法。臭氧氧化的一个主要优点是，它通常不会产生任何需要进一步处理的额外废流(例如，过滤会这样做)。然而，臭氧向下的有色化合物和难降解化合物的选择性取决于废水的特性。这一点尤其重要，因为臭氧不应该用于处理容易生物降解并可以通过传统生物过程去除的有机物。因此，需要对臭氧氧化选择性去除有色废水中难降解化合物的效率进行全面的实验室规模评估，以了解这项技术的优势和局限性，并得出其商业规模应用的经济结论。这项研究由不列颠哥伦比亚大学(UBC)发起，BCResearch Inc.(BCRI)积极参与。这个项目的主要目标是研究臭氧氧化去除一硝基苯生产过程中产生的废水中残留颜色的效率。项目的第一和第二阶段将包括识别重要的工艺参数和设计测试计划，以研究每个参数对颜色去除效率的影响。第三阶段将在我们实验室提供的实验室规模的臭氧接触器中执行设计的测试计划，确定氧化过程的动力学，并确定不同参数的重要性。最后一阶段将集中于在更大规模的流动臭氧氧化装置中测试最佳运行参数，该装置也在我们的实验室提供。

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.