Fate and Transport of Contaminants and Advanced Tertiary Treatment for their Removal During Municipal Wastewater Treatment Processes

长期以来，城市污水处理厂(MWTP)一直被认为是许多历史污染物以及许多新出现的令人关注的污染物(CEC)的重要来源，如药品和个人护理产品(PPCP)以及阻燃剂。与这些污染物相关的健康问题包括非致癌和致癌的健康影响以及可能的内分泌干扰。申请人对两个研究项目进行了研究，以更好地了解和管理污水处理厂污水对环境造成的污染物负荷。拟议的研究计划将扩展这两个研究项目的结果，如下所述。**-我们最近的工作表明，胶体有机碳(COC)在控制污水处理过程中有机污染物的去向方面可以发挥重要作用。然而，影响这种划分的因素仍然不清楚。建议与其他化学品组开展更多的工作，使用已经开发的方法，计划更好地了解行为和修改预测模型。这些结果有望帮助科学家和监管机构更好地了解、量化和管理污水处理厂排放到环境中的污染物负荷。**-污水处理厂在去除几种CEC(如制药)方面不是很有效，是这些污染物的一个重要点源。MWTPs也是致病微生物(量化为E.Coli)的重要来源。我们最近的研究表明，臭氧在同时实现对加拿大二级处理城市废水中许多CEC的消毒和转化方面是有效的。建议的研究将探讨进一步发展和优化以臭氧为基础的污水处理厂污水处理流程，以最大限度地减少污染物水平和毒性。建议的研究预计将导致更有效和更具成本效益的策略来处理污水处理厂污水和饮用水水源中的污染物。

Municipal wastewater treatment plants (MWTPs) have long been recognized to be of concern as a significant source for many contaminants of historical as well as many new contaminants of emerging concern (CEC) such as pharmaceuticals and personal care products (PPCPs), and flame retardants. The health concerns associated with these contaminants include non-carcinogenic and carcinogenic health effects and potential for endocrine disruption. The applicant has conducted research on two research projects to better understand and manage contaminant loadings to the environment resulting from MWTP effluents. The proposed research program will extend the findings from both the research projects, as discussed below.**- Our recent work has shown that colloidal organic carbon (COC) can play an important role in controlling the fate of organic contaminants during the sewage treatment process. However, factors affecting this partitioning are still not clear. More work with other group of chemicals is proposed using methodologies already developed are planned to better understand the behaviour and modify predictive models. The results are expected to help scientists and regulators better understand, quantify and manage contaminant loadings to the environment from MWTP effluent discharges.**- MWTPs are not very effective in the removal of several CECs (such as pharmaceuticals) and are an**important point source for these to drinking water sources. MWTPs are also important sources for disease causing organisms (quantified as E. coli). Our recent study has demonstrated the effectiveness of ozonation in simultaneously achieving disinfection and transformation of many CECs in secondary treated municipal wastewaters in Canada. The proposed research would examine further development and optimization of ozone-based process for the treatment of MWTP effluent to maximize reduction in contaminant level as well as toxicity.The proposed research is expected to lead to more efficient and cost-effective strategies for dealing with contaminants in MWTP effluents and drinking water sources.********