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Scale-up modelling and life cycle assessment of electrochemical oxidation in wastewater treatment
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2022-11-26 , DOI: 10.1016/j.cej.2022.140627
Sara Feijoo, Sofía Estévez, Mohammadreza Kamali, Raf Dewil, María Teresa Moreira

The need to improve current wastewater treatments to ensure a clean and sustainable water supply is an unquestionable contemporary challenge. It is therefore essential to facilitate knowledge transfer between research institutions and the industry by developing novel technologies to a proof-of-concept stage, demonstrating both treatment efficiency and compliance with environmental criteria. This study has combined process modelling for the design of an electrochemical Advanced Oxidation Process (eAOP) to remove carbamazepine (CBZ) from wastewater with the identification of the environmental impacts associated with its operation. A comprehensive set of scenarios considering several reactor designs and operating conditions provides the assessment framework to identify the influence of different process variables on the environmental profile of the pilot-scale eAOP. The most sustainable treatment corresponds to the operation of a standardised modular reactor in batch mode, especially when the wastewater has a low concentration of scavengers, such as other ions, organics or pollutants. Nevertheless, in all scenarios evaluated, the main environmental hotspot was attributed to the electrical energy consumed by the auxiliary pumps rather than the electrochemical reactor itself. In comparison to other AOPs, our system showed considerably lower impacts in the global warming potential (GWP) category, with a minimum of 7.6 kg CO2 eq per g CBZ removed for the most promising scenario. This demonstrates the implementation potential of eAOPs as well as the importance of data from scaled-up experiments, where optimisation should focus on mitigating the impacts of energy-intensive pieces of equipment.



中文翻译:

废水处理中电化学氧化的放大建模和生命周期评估

需要改进当前的废水处理以确保清洁和可持续的供水是当代不容置疑的挑战。因此,通过将新技术开发到概念验证阶段,证明处理效率和符合环境标准,促进研究机构和行业之间的知识转移至关重要。本研究结合了用于设计电化学高级氧化工艺 (eAOP) 的工艺建模,以从废水中去除卡马西平 (CBZ),并确定与其运行相关的环境影响。考虑到多个反应堆设计和运行条件的一套综合情景提供了评估框架,以确定不同过程变量对中试规模 eAOP 环境概况的影响。最可持续的处理对应于以批处理模式运行标准化模块化反应器,尤其是当废水中清除剂(如其他离子、有机物或污染物)浓度较低时。然而,在所有评估的场景中,主要的环境热点归因于辅助泵消耗的电能,而不是电化学反应器本身。与其他 AOP 相比,我们的系统在全球变暖潜能值 (GWP) 类别中的影响要低得多,最低 7.6 千克 CO 最可持续的处理对应于以批处理模式运行标准化模块化反应器,尤其是当废水中清除剂(如其他离子、有机物或污染物)浓度较低时。然而,在所有评估的场景中,主要的环境热点归因于辅助泵消耗的电能,而不是电化学反应器本身。与其他 AOP 相比,我们的系统在全球变暖潜能值 (GWP) 类别中的影响要低得多,最低 7.6 千克 CO 最可持续的处理对应于以批处理模式运行标准化模块化反应器,尤其是当废水中清除剂(如其他离子、有机物或污染物)浓度较低时。然而,在所有评估的场景中,主要的环境热点归因于辅助泵消耗的电能,而不是电化学反应器本身。与其他 AOP 相比,我们的系统在全球变暖潜能值 (GWP) 类别中的影响要低得多,最低 7.6 千克 CO 主要的环境热点归因于辅助泵消耗的电能,而不是电化学反应器本身。与其他 AOP 相比,我们的系统在全球变暖潜能值 (GWP) 类别中的影响要低得多,最低 7.6 千克 CO 主要的环境热点归因于辅助泵消耗的电能,而不是电化学反应器本身。与其他 AOP 相比,我们的系统在全球变暖潜能值 (GWP) 类别中的影响要低得多,最低 7.6 千克 CO2个对于最有希望的情况,每克 CBZ 的当量被移除。这证明了 eAOP 的实施潜力以及扩大实验数据的重要性,其中优化应侧重于减轻能源密集型设备的影响。

更新日期:2022-12-01
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