Ionian Department of Law, Economics and Environment, University of Bari Aldo Moro, Taranto, Italy.
Ionian Department of Law, Economics and Environment, University of Bari Aldo Moro, Taranto, Italy.
Sci Total Environ. 2023 Jan 20;857(Pt 2):159309. doi: 10.1016/j.scitotenv.2022.159309. Epub 2022 Oct 7.
In the last decades particular attention is being paid to the efficient and effective removal of compounds of emerging concern (CECs) present in wastewater before their eventual reuse or disposal. Several technologies have been developed for the degradation of CECs in aqueous matrix, in this regard advanced oxidation processes (AOPs) represent a nascent technological solution developed on a laboratory scale with applications on a prototype scale. The experimental evidences have shown that AOPs processes can oxidize numerous organic compounds in a much faster and more efficient way than that of the most common disinfection processes. The most common AOPs processes are those that involve the use of HO/UV, O/UV, HO/O, HO/O/UV, Fenton and photo-Fenton. The aim of this work is to illustrate the results of a comparative LCA study of a laboratory scale UV-C photoreactor for the tertiary treatment of urban wastewater of three treatment systems (UV-C, UV-C + HO e UV-C + TiO). In particular, the specific objective is to evaluate, from an environmental point of view, an innovative advanced oxidation system based on nanostructures TiO immobilized on a stainless steel mesh. Compared to the UV-C photolysis reference system, the addition of hydrogen peroxide reduces the total environmental impact of the system by almost 75 %, while the use of the stainless-steel mesh coated by the nanostructures titanium dioxide reduces the UV-C environmental impact by 30 %. These results are due to the lower energy consumption of these last treatments compared to photolysis alone. The main impacts of the three systems are related to the electric power consumption of the centrifugal pump (63-64 %) and of the UV-C lamp (32-33 %). The LCA applied to these systems has shown that TiO assisted photocatalysis is not yet advantageous from an environmental point of view and that, therefore, the efficiency of the system needs to be improved.
在过去的几十年中，人们特别关注在将废水进行再利用或处理之前，有效去除废水中新兴关注化合物（CECs）。已经开发出几种用于降解水基中 CECs 的技术，在这方面，高级氧化工艺（AOPs）代表了一种新兴的技术解决方案，该方案是在实验室规模上开发的，并在原型规模上得到应用。实验证据表明，AOPs 工艺可以比最常见的消毒工艺更快、更有效地氧化许多有机化合物。最常见的 AOPs 工艺是那些涉及使用 HO/UV、O/UV、HO/O、HO/O/UV、Fenton 和光 Fenton 的工艺。本工作的目的是说明对三种处理系统（UV-C、UV-C+HO 和 UV-C+TiO）的城市废水三级处理用实验室规模 UV-C 光反应器的比较生命周期评估研究结果。具体而言，其特定目标是从环境角度评估基于固定在不锈钢网上的纳米结构 TiO 的新型先进氧化系统。与 UV-C 光解参考系统相比，添加过氧化氢将系统的总环境影响降低了近 75%，而使用涂覆有纳米结构二氧化钛的不锈钢网则将 UV-C 的环境影响降低了 30%。这些结果是由于与单独光解相比，这些后处理的能耗更低。这三个系统的主要影响与离心泵（63-64%）和 UV-C 灯（32-33%）的电力消耗有关。对这些系统进行的生命周期评估表明，从环境角度来看，TiO 辅助光催化还没有优势，因此，需要提高系统的效率。
