Feasibility Study of Fluid Driven Application in Ultraviolet Sterilisation

流體驅動紫外光殺菌可行性研究

張文鏵(WEN-HUA ZHANG) ； 林唯耕(WEI-KENG LIN) ； 陳建佑(CHIEN-YU CHEN) ； 江松柏(SONG-BOR CHIANG) ； 吳世國(SHIH-KUO WU)

《台灣水利》 68卷2期 (2020/06) Pp. 20-27

https://doi.org/10.6937/TWC.202006/PP_68(2).0002

摘要

This paper proposed a fluid-driven sterilisation equipment with a hydroelectric generator. The equipment consists of three components: (1) a fluid-driven power generator, (2) a sterilisation light source, and (3) a spiral flow channel. The potential energy of water is transformed into electric energy through the hydroelectric generator, and the generated electric energy is used to drive the ultraviolet (UV) light source. UV light can physically destroy pathogenic organisms such as viruses and bacteria in the water flowing through the device, so as to achieve water sterilisation. A UV light-emitting diodes (LED), as the light source of sterilisation, can miniaturize the volume of the sterilisation device and improve the utilisation efficiency of light energy. This research conducted the simulation on the characteristics of UV LED light source, thus evaluated the feasibility of its application in fluid-driven sterilisation. According to the test results, the potential energy of tap water can generate electricity greater than 30 W. The tap water flow was set at the entrance of the device, and the time of exposure to UV light was adjusted by the spiral channel. The sterilisation efficiency of different UV wavelengths was tested. In the experiment, the sterilisation efficacy of an Escherichia coli culture medium was tested. The results showed that UV C (200-280 nm) was the best light source for sterilisation. With an exposure time of 20 s, the sterilisation rate for E. coli could reach 92% through the spiral channel. As the feasibility of fluid-driven sterilisation is evaluated, there is a potential that this technology can be further applied to water purification in remote and underdeveloped areas or in portable water purification devices.

關鍵字

Sterilisation ； Potential Energy ； Ultraviolet Light ； Wavelength

並列摘要

這項研究提出了一種帶有水力發電機的流體驅動殺菌設備，本設備包含三種元件整合，1. 流體驅動發電裝置；2. 滅菌光源；3. 螺旋流道。主要是利用擁有位能的水源經過水力發電裝置，將位能轉換成電能，產生的電能供應紫外光源驅動，紫外線可以對流經該裝置水中所含的病毒、細菌等致病體進行物理破壞，達到對水殺菌的目的。UV LED應用於殺菌光源，可以縮小殺菌裝置之體積、提升光能利用效率。本文模擬UV LED光源特性，評估其應用在流體驅動滅菌的可行性。經過測試，一般的水龍頭的所含的位能，可產生大於30W的電能。在裝置的入口端設定水龍頭流量，使用螺旋通道調整水暴露於紫外光的時間，並測試不同紫外線波長的殺菌效率。實際以大腸桿菌培養液測試殺菌效果。結果顯示，光源選用UV C波段（200-280 nm）的殺菌效果最好，經過螺旋式流道，延長曝光時間至20秒，大腸桿菌滅菌率可達92%。本評估了流體驅動滅菌的可行性，該技術預計可延伸應用在偏遠落後地區的水質淨化或旅行隨身攜帶淨水裝置。

並列關鍵字

殺菌 ； 位能 ； 紫外光 ； 波長

參考文獻

Aihara, M.,Lian, X.,Shimohata, T.,Uebanso, T.,Mawatari, K.,Harada, Y.,Takahashi, A.(2014).Vegetable surface sterilization system using UVA light-emitting diodes.The Journal of Medical Investigation.61(3.4),285-290.

Schmalwieser, Alois W.,Hirschmann, Georg,Cabaj, Alexander,Sommer, Regina(2016).Method to determine the power efficiency of UV disinfection plants and its application to low pressure plants for drinking water.Water Supply.17(4),947-957.

Bohrerova, Zuzana(2008).Comparative disinfection efficiency of pulsed and continuous-wave UV irradiation technologies.Water research.42(12),2975-2982.

Chen, C.-Y.,Nace, G. W.,Irwin, P. L.(2003).A 6×6 drop plate method for simultaneous colony counting and MPN enumeration of Campylobacter jejuni, Listeria monocytogenes, and Escherichia coli.Journal of Microbiological Methods.55(2),475-479.

Ding, W.,Jin, W.,Cao, S.,Zhou, X.,Wang, C.,Jiang, Q.,Wang, Q.(2019).Ozone disinfection of chlorine-resistant bacteria in drinking water.Water research.160,339-349.