Wastewater degradation driven by the membrane voltage in a closed-loop reverse electrodialysis system integrated with air-gap diffusion distillation technology

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2025-02-24 DOI:10.1016/j.desal.2025.118743

Qiang Leng , Feilong Li , Yihao Ma , Chunxiao Zhang , Lin Wang , Zhanwei Wang , Xi Wu

{"title":"Wastewater degradation driven by the membrane voltage in a closed-loop reverse electrodialysis system integrated with air-gap diffusion distillation technology","authors":"Qiang Leng , Feilong Li , Yihao Ma , Chunxiao Zhang , Lin Wang , Zhanwei Wang , Xi Wu","doi":"10.1016/j.desal.2025.118743","DOIUrl":null,"url":null,"abstract":"<div><div>Air-gap diffusion distillation (AGDD) has been frequently integrated with reverse electrodialysis (RED) to form a chemical heat engine for the utilization of low-grade thermal energy (LGH). This chemical heat engine can convert LGH into salinity gradient energy (SGE), which is then transformed into electrical energy. Due to the compatibility of the RED system, the AGDD-RED heat engine can also be employed for the degradation of organic wastewater. This paper presents the development of a mathematical simulation model for an AGDD-RED system designed specifically for wastewater treatment. The theoretical impact of various parameters, including feed solution concentration, flow rate, and changes in heat source temperature on system performance, are simulated and discussed. The heat engine for wastewater treatment achieves a conversion efficiency of 4.57 % in transforming LGH into SGE, resulting in a final electricity conversion efficiency of 0.84 %. The heat engine utilized for wastewater treatment attains a chemical oxygen demand (COD) removal rate of 63.33 % after 4 h. Additionally, in optimal conditions, the energy conversion efficiency elevates to 0.90 %, while the energy consumption for per unit COD degradation is optimized to 9.81 × 10<sup>3</sup> kWh∙kgCOD<sup>−1</sup>. This research provides a novel approach for utilizing low-grade thermal energy in the field of wastewater degradation.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"605 ","pages":"Article 118743"},"PeriodicalIF":8.3000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Desalination","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0011916425002188","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Air-gap diffusion distillation (AGDD) has been frequently integrated with reverse electrodialysis (RED) to form a chemical heat engine for the utilization of low-grade thermal energy (LGH). This chemical heat engine can convert LGH into salinity gradient energy (SGE), which is then transformed into electrical energy. Due to the compatibility of the RED system, the AGDD-RED heat engine can also be employed for the degradation of organic wastewater. This paper presents the development of a mathematical simulation model for an AGDD-RED system designed specifically for wastewater treatment. The theoretical impact of various parameters, including feed solution concentration, flow rate, and changes in heat source temperature on system performance, are simulated and discussed. The heat engine for wastewater treatment achieves a conversion efficiency of 4.57 % in transforming LGH into SGE, resulting in a final electricity conversion efficiency of 0.84 %. The heat engine utilized for wastewater treatment attains a chemical oxygen demand (COD) removal rate of 63.33 % after 4 h. Additionally, in optimal conditions, the energy conversion efficiency elevates to 0.90 %, while the energy consumption for per unit COD degradation is optimized to 9.81 × 10³ kWh∙kgCOD⁻¹. This research provides a novel approach for utilizing low-grade thermal energy in the field of wastewater degradation.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.