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標題: | 微生物燃料電池-薄膜電容去離子整合程序應用於再生水生產和銨離子濃縮之研究 Microbial Fuel Cell and Membrane Capacitive Deionization Integrated Process for Water Reclamation and Ammonium Concentration |
作者: | 蘇強升 Chiang-Sheng Su |
指導教授: | 侯嘉洪 Chia-Hung Hou |
關鍵字: | 電化學程序,薄膜電容去離子技術,微生物燃料電池,再生水生產,銨離子濃縮, electrochemical process,membrane capacitive deionization,microbial fuel cell,water reclamation,ammonium concentration, |
出版年 : | 2024 |
學位: | 碩士 |
摘要: | 近年來,由於人口快速增加和經濟活動規模的提升,人類對淡水資源、能源和營養物質的需求逐步增長。儘管再生水技術被認為是解決水資源短缺的一個方案,卻需要面對傳統技術具有較高能源需求的限制。新興之電化學程序如薄膜電容去離子技術 (Membrane capacitive deionization, MCDI)和微生物燃料電池 (Microbial fuel cell, MFC)具有低能耗與環境友善之特點,MCDI採用了多孔性碳電極與離子交換膜,以電吸附移除溶液中離子,並藉由離子滲透選擇性而減少同離子效應, 進而達到高能源效能的脫鹽。MFC則利用電活性微生物降解有機物並轉換為電能,達成水中汙染物之移除與能源回收。本研究首次整合了MFC處理與MCDI處理,目的為評估以MFC-MCDI整合程序作為再生水技術處理汙水的效能,分析系統之能源使用表現與再生水水質,並探討在MCDI程序達成銨離子濃縮的可行性。結果顯示MFC系統能夠達到約90%之COD移除效率,同時系統產生電力之功率密度為521 mW/m2。通過MCDI系統的充電操作,在1.6 V之工作電壓充電25分鐘的操作條件下,能夠將進流溶液之導電度由約1500 µS/cm降低至250 µS/cm以下,最低降至57 µS/cm,出流溶液達到再生水的品質,並且能耗為0.593 kWh/m3。在MCDI的放電操作中,溶液之導電度被提升至10000 µS/cm以上,並且NH4+-N濃度也受到提升,由24.5 mg/L提升至最高137.9 mg/L以上。濃縮溶液被用於MCDI之二次濃縮實驗,水中之銨離子受到進一步濃縮,NH4+-N濃度由120 mg/L提升至最高450 mg/L以上。結論而言,MFC-MCDI整合程序作為再生水技術發展之潛力,在於具有低能耗優勢與良好之處理效果,並且MCDI系統在銨離子濃縮之應用值得更深入的研究。 In recent years, owing to rapid population growth and the expansion of economic activities, the demand for freshwater, energy, and nutrients has been steadily increasing. Despite water reclamation being considered an option to address water scarcity, it faces burdens associated with conventional technologies characterized by higher energy requirements. Promising electrochemical processes such as membrane capacitive deionization (MCDI) and microbial fuel cell (MFC) exhibit low energy consumption and environmental friendliness. MCDI employs a porous carbon electrode and ion exchange membrane to achieve electrosorption for ion removal, reducing the co-ion effect through permselectivity, thereby achieving energy-efficient desalination. MFC utilizes electroactive bacteria to facilitate the degradation of organics and the conversion into electricity for contaminant removal and energy recovery. This study innovatively integrates microbial fuel cell treatment with membrane capacitive deionization process. The objective is to assess the efficacy of the integrated MFC-MCDI process as a wastewater treatment technology for water reclamation. The evaluation includes the analysis of energy consumption performance and the water quality, and verifying the feasibility of NH4+-N concentration in the MCDI process. Results indicate that the MFC achieve 90% COD removal efficiency and a generation of power density of 521 mW/m2. Through the charging operation of the MCDI system, operating at a working voltage of 1.6 V for 25 minutes, the conductivity of the influent solution was effectively reduced from approximately 1500 µS/cm to below 250 µS/cm, reaching a minimum of 57 µS/cm. The effluent solution achieved the quality of reclaimed water, with an energy consumption of 0.593 kWh/m3. In the discharge state of the MCDI operation, the conductivity of the solution increased to above 10,000 µS/cm, accompanied by an elevation in NH4+-N concentration from 24.5 mg/L to a peak of 137.9 mg/L. Concentrated effluent is used for a secondary MCDI operation, the concentration of concentrated NH4+-N concentration increasing from 120 mg/L to over 450 mg/L. In conclusion, the integration of MFC-MCDI as a water reclamation technology holds significant potential due to its low energy consumption and effective treatment performance, and the application in ammonium concentration merits further research. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91605 |
DOI: | 10.6342/NTU202400202 |
全文授權: | 同意授權(限校園內公開) |
顯示於系所單位: | 環境工程學研究所 |
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