電容去離子技術去除水中氨氮之基礎研究

The Characteristics of Capacitive Deionization Technology Using for Ammonia Removal

林潮宗(Chao-Tsung Lin)

指導教授 ： 莊順興

朝陽科技大學/理工學院/環境工程與管理系/碩士(2013年)

摘要

中文摘要
本研究分別以套裝式CDI設備與自組CDI模型廠進行NH4+-N去除之研究，套裝式CDI設備分別探討HRT、濃度、及離子干擾等因子之影響，而自組CDI模型廠探討因子包括HRT、濃度、電壓等因子。研究結果顯示，套裝式CDI設備去除NH4+-N在NH4+-N濃度為100 mg/L之條件下，其去除率可達53%，不同HRT對氨氮之去除率約為44~53%，顯示溶液與活性碳電極接觸時間也是重要參數之一。而不同NH4+-N濃度之實驗結果發現，高濃度條件下有較佳之去除率。此外不同價數陽離子之干擾，實驗結果顯示，三價離子比一價離子之干擾現象明顯，導致NH4+-N吸附效率降低。
此外研究結果顯示，自組CDI模型廠去除NH4+-N，以不同HRT做為參數，結果顯示HRT較長，增長極板與溶液接觸時間，使去除率有增加之情況， NH4+-N去除率約從59 %升高至78 %，以不同NH4+-N濃度20、40、60、80、100 mg/L實驗結果顯示，低濃度20 mg/L去除率可達87 %，高濃度100 mg/L，NH4+-N去除率則僅有20%，此外以電壓1V~1.8 V做為參數，結果顯示較高電壓有較佳之氨氮去除率，去除率從32%升高至68%，綜合上述之結果顯示在高濃度下NH4+-N去除率則不佳，電壓則以1.8 V做為最佳參數。計算其能源消耗，結果顯示不同HRT以0.89 min為最高，該設備操作1小時用電量為0.027 kW-h，不同濃度則以NH4+-N 100 mg/L為最高，其該設備操作1小時用電量為0.00047 kW-h，不同電壓則以1.8 V用電量最高，該設備操作1小時用電量為0.00085 kW-h。

關鍵字

氨氮 ； 電容去離子技術 ； 離子干擾 ； 水力停留時間

並列摘要

Abstract
In this research, Ammonia Nitrogen (NH4+ -N) removal was carried out in the package type of Capacitive Deionization (CDI) equipment and the self-assembly CDI model factory respectively. The influence of the factors including Hydraulic Retention Time (HRT), concentration and ion interference have been investigated separately in the package type of CDI equipment. And the investigating factors were HRT, concentration and voltage in the self-assembly CDI model factory.
The research result showed, under the condition of 100 mg/L of NH4+ -N concentration, the removal efficiency could reach 53% in the package type of CDI equipment; and the removal efficiency from different HRT on ammonia nitrogen was about 44~53%; it also showed the contact time between solution and active carbon electrode was one of the important parameters. But, the experimental result of different NH4+ -N concentrations revealed that the removal efficiency was better
under the condition of high concentration, in addition, the interference from different cationic valence, the result revealed that the interference phenomenon of trivalent ion was more significant than monatomic ion, causing NH4+ -N electrosorption efficiency was decreased.

Moreover, the result of the research showed, the self-assembly CDI model factory removed NH4+-N with different HRT parameters, the result revealed that HRT was longer and the contact time between pole plate and solution was extended in order to increase the removal efficiency; hence, the removal efficiency was increased approximately from 59% to 78%. Based on the results of experiment, with different concentration of NH4+-N, which were 20, 40, 60, 80, and 100 mg/L, the removal efficiency of low concentration (20 mg/L) could reach 87 %; however, the removal efficiency of high concentration (100 mg/L) was only 20%. Besides, the voltages from 1V to 1.8 V were as the parameters and the result showed that the removal efficiency of Ammonia Nitrogen was better with higher voltage; its removal efficiency was increased from 32% to 68%. In conclusion, the removal efficiency of NH4+-N was no good under high concentration, and the voltage of 1.8V was the best parameter. Further, calculating its energy consumption, the result showed 0.89 min was the highest one from different HRT; The device is one hour power consumption was 0.027 kW-h. The highest concentration was NH4+- N 100 mg/L under different concentrations, The device is operating one hours of its power consumption was 0.00047 kW-h; the highest power consumption was 1.8V with different voltages, The device is operating one hours of its power consumption was 0.00085 kW-h.

並列關鍵字

Hydraulic Retention Time (HRT) ； Ion Interference ； Capacitive Deionization (CDI) ； Keywords: Ammonia Nitrogen (NH4+ -N)

參考文獻

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