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標題: | 太陽光電驅動之電容去離子淨水裝置應用於偏遠社區:烏干達案例研究 Off-grid Solar Powered Capacitive Deionization for Water Purification in Remote Community: A Case Study in Rural Uganda. |
作者: | Yu-Ting Hsieh 謝雨婷 |
指導教授: | 侯嘉洪(Chia-Hung Hou) 侯嘉洪(Chia-Hung Hou | chiahunghou@ntu.edu.tw | ), |
關鍵字: | 電容去離子,太陽能驅動,離網,分散型,地下水脫鹽, capacitive deionization,photovoltaic energy,off-grid,decentralized,groundwater desalination, |
出版年 : | 2022 |
學位: | 碩士 |
摘要: | 地下水提供了全球半數以上人口的飲用水源及43%的灌溉用水,為重要的淡水資源。隨著人口增長過度抽取、氣候變遷海平面上升以及既有的自然風化作用,地下水鹽化成了普遍的污染議題。全球約有11億人生活在地下水鹽化地區水中過量鹽度將對人體健康和產業使用造成負面影響。在非洲,低電網覆蓋率以及低度都市發展,使其難以拓展淨水與衛生的基礎建設。面對地區發展程度不同,水處理系統應具有靈活設計和適宜的技術配置。本篇研究以烏干達偏鄉社區做為案例研究地點,根據其家戶需求和水質條件,建立離網太陽能驅動之電容去離子淨水系統。電容去離子(Capacitive deionization, CDI)裝置由十對多孔活性碳電極組成,透過施加1.6伏特低電壓以電吸附(electrosorption)移除水中離子,達到地下水脫鹽之目的。系統結合前處理過濾程序,並以直流電可驅動之電動幫浦進水,以便攜式的單元組合透過太陽能供電,實現能源獨立的移動式脫鹽系統。研究於烏干達進行一系列現場實驗,包括:(1)地下水脫鹽表現;(2)不同目標水質的系統能耗分析;以及(3)太陽能產量紀錄,以驗證此系統的可行性。結果表明,離網太陽能驅動之電容去離子系統具有良好的脫鹽效果(移除率> 50%)、高水回收率(> 60%),可將地下水處理至符合烏干達國家飲用水標準,如導電度降至1500 μS/cm以下。整體來說,CDI系統具小規模能源優勢(< 1.3 kWh/m3),靈活的程序設計和良好水質適應性等特性,適合用於電力和安全水源缺乏的烏干達偏鄉社區。 Groundwater salinization is a worldwide issue, and approximately 1.1 billion people around the world live in saline groundwater-affected areas. The excessive amount of salt in groundwater can give rise to health problems or make the water unacceptable for use. To ensure water quality and availability, appropriate technology should be considered for areas with different development levels. This study aims to establish an off-grid solar-powered capacitive deionization (CDI) for groundwater purification in rural Uganda on an as-needed basis from field surveys, such as household size, water issues, and water quality. The system consisted of an ultrafiltration (UF) module for pretreatment, a CDI stack consisting of ten pairs of electrodes for desalination, and a solar photovoltaic system for power supply. By the application of an electrical potential of 1.6 V, ions or charged pollution in feed water are attracted to opposite-charged electrodes and adsorbed on the surface of nanostructure porous electrodes, and thus freshwater is produced. Further, a series of field tests, including groundwater desalination performance, system energy consumption at different desalination processes, and solar energy yield, were conducted to demonstrate the feasibility of the CDI system. Overall, CDI provides up to 50% removal rate, high water recovery (> 60%), and good energy performance (< 1.3 kWh/m3) for groundwater desalination. The solar-powered CDI system is a viable option in rural Uganda with electricity and water shortages due to its characteristics of small-scale, flexible design, and adaptability to water quality. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/86432 |
DOI: | 10.6342/NTU202202556 |
全文授權: | 同意授權(全球公開) |
電子全文公開日期: | 2025-08-25 |
顯示於系所單位: | 環境工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
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U0001-1808202217241400.pdf 此日期後於網路公開 2025-08-25 | 2.62 MB | Adobe PDF |
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