Colour removal from a nitration effluent using ozonation

臭氧氧化是一种有效的降解工业废水中难生物处理的有色残留物的方法。臭氧化的一个主要优点是，它通常不会产生任何额外的废物流，需要进一步处理（例如过滤）。然而，臭氧对有色和难降解化合物的选择性取决于流出物的特性。这是特别重要的，因为臭氧不应该被用来处理有机物，很容易生物降解，可以通过传统的生物工艺去除。因此，一个彻底的实验室规模的臭氧化在选择性去除柠檬酸类化合物从有色废水的效率评估是需要了解这种技术的优点和局限性，并得出经济的结论，其商业规模的application.This研究是由不列颠哥伦比亚省（UBC）的大学发起，并涉及积极参与BCResearch公司。（巴塞尔公约国际研究所）本项目的主要目的是研究臭氧氧化法去除单硝基苯生产过程中产生的废水中的残留色度的效率，项目的第一和第二阶段将包括确定重要的工艺参数和设计试验方案，以研究每个参数对色度去除效率的影响。第三阶段将在我们实验室现有的实验室规模的臭氧接触器中执行设计的测试计划，并确定氧化过程的动力学，并确定不同参数的重要性。最后一个阶段将集中在测试的最佳操作参数，在一个更大的规模流通臭氧化装置，这也是在我们的实验室。

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.