- 學位論文
以280波長深紫外光發光二極體應用於流動式水殺菌反應器
Application of 280nm Deep Ultraviolet LEDs for Water Flow Disinfection Reactor
摘要
本研究主旨在於探討輻射通量、入口流量、外管半徑(RO)與光源均勻性的變化對於UVC水殺菌器之殺菌效果的變化影響。光源選擇為LG Innotek公司的280nm深紫外光發光二極體；菌種選擇為生物資源保存及研究中心的大腸桿菌(Escherichia coli K12 IFO 3301)，結合Ansys的流場分析與TracePro的輻照度模擬並製作實際樣品驗證理論值，並使用塗盤法檢測殺菌前與後菌落數的差異。 輻射通量為LED每單位時間的輻射能量。輻射通量的增加其結果為可預測的增長。而入口流量的增加可從固定RO的實驗來觀測，根據本研究由於水流平均停留於反應器內部的時間隨著流量增加而減少，故其殺菌滅活效率將下降，且有逐漸趨緩的趨勢。 當縮小RO有兩項變因影響殺菌效果，第一項為殺菌器內部光源至外管的距離，因外管壁內縮使得光衰退的效果降低，進而提升殺菌器內部平均輻照度上升；第二項為在固定流量下，外管壁的內縮導致截面積縮小，相對提升水在反應器內部的平均流速，導致大腸桿菌與紫外光反應時間降低，進而影響殺菌滅活數下降。
並列摘要
The purpose of this study is to investigate the effects of radiant flux, inlet flow, outer tube radius (RO) and light source uniformity on the bactericidal effect of the UVC water disinfection. The 280nm deep ultraviolet light-emitting diode was from LG Innotek's；the bacteria was selected from Escherichia coli K12 IFO 3301.Combined with Ansys flow field analysis and TracePro irradiance simulation. Make the actual sample verification theoretical value, and use the spread -plate method to detect the difference between the number of colonies before and after disinfection. The radiant flux is the radiant energy of the LED per unit time. The increase in radiant flux is a predictable increase. The increase of the inlet flow rate can be observed from the experiment of fixed RO. According to the study, the average time of the water flow staying inside the reactor decreases with the increase of the flow rate, so the sterilization and inactivation efficiency will decrease, and there is a tendency to gradually slow down. . When the reduction of RO has two causes that affect the bactericidal effect, the first item is the distance from the internal light source of the sterilizer to the outer tube, and the effect of light decay is reduced due to the shrinkage of the outer tube wall, thereby increasing the average irradiance inside the sterilizer; The second item is that under the fixed flow rate, the shrinkage of the outer tube wall leads to a reduction in the cross-sectional area, and the relative flow rate of the water in the reactor is relatively increased, resulting in a decrease in the reaction time of E. coli and ultraviolet light, thereby affecting the decrease in the number of sterilization inactivation.
參考文獻
延伸閱讀
- 葉宗儒（2019）。深紫外發光二極體陣列排列對水殺菌反應器之研究〔碩士論文，中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu201900699
- 洪典裕（2009）。垂直方向二氧化鈦微米柱陣列電極應用於染料敏化太陽能電池之研究〔碩士論文，國立虎尾科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0028-1307200917370200
- Tu, P. M. (2012). 高效率近紫外光發光二極體元件製作 [doctoral dissertation, National Chiao Tung University]. Airiti Library. https://doi.org/10.6842/NCTU.2012.00328
- 李政霖（2019）。可溼製高效率深藍光有機發光二極體〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-0206202016160997
- 陳羣文（2012）。Integration of LED Illumination System with Dielectric Liquid Lens〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-2002201315123719