文献类型：期刊文献

英文题名：Combining medium coalescence filtration and combined fiber coalescence: A pilot study on treating washing wastewater from shipboard EGR systems

作者：Li, Yu[1];Xue, Jinwei[1];Zhang, Guangyao[1];Liu, Yiqian[1];Liu, Haonan[1];Wang, Keyu[1];Han, Xin[1];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：14

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20261920649326);WOS:【SCI-EXPANDED(收录号:WOS:001763291900001)】；

基金：The authors gratefully acknowledge the financial support of this work by the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：EGR washing wastewater; Physical separation; Fiber coalescence; Economic cost analysis; Pilot-scale study

摘要：Exhaust gas recirculation (EGR) is a mainstream technology for controlling nitrogen oxide emissions in marine diesel engines. However, the wet washing process in EGR systems inevitably generates oily wastewater containing dispersed oil, emulsified oil, and suspended solids (SS). Conventional separation technologies, such as disk centrifuges, are energy-intensive and suffer from unstable effluent quality, limiting their applicability under increasingly stringent marine discharge regulations. In this study, a novel physical treatment process integrating multiphase extraction (MPE) and combined fiber coalescence (CFC) is proposed for the efficient removal of oil and SS from shipboard EGR washing wastewater. With a treatment capacity of 2 m3/h, a pilot test reduced the average oil, SS, and chemical oxygen demand (COD) contents of the effluent to 11.4, 14.3, and 226 mg/L, respectively, satisfying the discharge standards for oily wastewater from ships. Compared with conventional shipboard and land-based treatment technologies, the proposed process exhibits lower energy consumption, stable separation performance, and reduced operational costs, while avoiding chemical addition and secondary waste generation. These results indicate that the MPE-CFC process provides an effective and sustainable solution for treating EGR washing wastewater and mitigating its environmental impact in marine applications.