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反渗透和 UV/HO 去除膜生物反应器出水中的雌二醇:技术和经济评估。

Ethinylestradiol removal of membrane bioreactor effluent by reverse osmosis and UV/HO: A technical and economic assessment.

机构信息

School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro (UFRJ), Brazil.

COPPE/Chemical Engineering Program, Federal University of Rio de Janeiro (UFRJ), Brazil.

出版信息

J Environ Manage. 2021 Mar 15;282:111948. doi: 10.1016/j.jenvman.2021.111948. Epub 2021 Jan 21.

Abstract

Synthetic hormone 17α-ethinylestradiol (EE2) is not completely removed by conventional wastewater treatment plants and therefore is often detected in surface and groundwater, sludge and sediments. Due to its persistence in the environment and its estrogenic potential, a high removal of EE2 from wastewaters before its disposal has become a concern from an environmental point of view, particularly when considering urban reuse applications. This work investigated the application of advanced processes to treat synthetic municipal wastewater containing EE2 after treatment in a membrane bioreactor (MBR). Two advanced processes were assessed: the first is advanced oxidation process (AOP), using hydrogen peroxide (HO) and ultraviolet (UV) light (route MBR-AOP) and the second, reverse osmosis (RO), in this case using UV/HO to treat the retentate from RO (route MBR-RO). EE2 concentration in final effluent was one order of magnitude lower in route MBR-AOP than in route MBR-RO. Implications for disposal or water reuse were discussed considering the importance of other water quality parameters as well. Economic estimates for CAPEX, OPEX and total cost were made. The introduction of the oxidative step (UV/HO) after MBR caused an increase in the total cost of US$ 0.39/m. In turn, route MBR-RO increased the total process cost by US$ 0.86/m, showing that reduction of volume to be treated by UV/HO in this route did not offset the cost associated with the acquisition and operation of RO. The total cost was estimated at US$ 2.47/m for MBR-AOP and US$ 2.94/m for MBR-RO for a design flow of 10 m³/h.

摘要

合成激素 17α-乙炔基雌二醇(EE2)不能被常规废水处理厂完全去除,因此经常在地表水和地下水、污泥和沉积物中被检出。由于其在环境中的持久性及其雌激素潜力,从废水中去除 EE2 已成为从环境角度关注的问题,尤其是在考虑城市再利用应用时。本研究考察了在膜生物反应器(MBR)处理后,采用高级工艺处理含 EE2 的合成城市废水的应用。评估了两种高级工艺:第一种是高级氧化工艺(AOP),使用过氧化氢(HO)和紫外线(UV)光(MBR-AOP 路线),第二种是反渗透(RO),在这种情况下,使用 UV/HO 处理 RO 的截留物(MBR-RO 路线)。MBR-AOP 路线中最终流出物中的 EE2 浓度比 MBR-RO 路线低一个数量级。考虑到其他水质参数的重要性,讨论了处置或水再利用的影响。对 CAPEX、OPEX 和总成本进行了经济估算。在 MBR 之后引入氧化步骤(UV/HO)会导致总成本增加 0.39 美元/m。相比之下,MBR-RO 路线增加了 0.86 美元/m 的总处理成本,表明在该路线中通过 UV/HO 减少待处理的体积并没有抵消与 RO 的购置和运行相关的成本。对于设计流量为 10m³/h 的 MBR-AOP 和 MBR-RO,总处理成本估计分别为 2.47 美元/m 和 2.94 美元/m。

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