scholarly journals Optical and Fluidic Co-Design of a UV-LED Water Disinfection Chamber

2012 ◽  
Keyword(s):  
Water Disinfection ◽  
Uv Led ◽  
Disinfection Chamber

Optical and Fluidic Co-Design of a UV-LED Water Disinfection Chamber

2013 ◽  
Vol 45 (17) ◽  
pp. 11-18 ◽  
Author(s):  
T. R. Harris ◽  
J. G. Pagan ◽  
P. Batoni
Keyword(s):  
Water Disinfection ◽  
Uv Led ◽  
Disinfection Chamber

Enhanced inactivation of E. coli by pulsed UV-LED irradiation during water disinfection

2019 ◽  
Vol 650 ◽  
pp. 210-215 ◽  
Author(s):  
Xiang-Yun Zou ◽  
Yi-Li Lin ◽  
Bin Xu ◽  
Tong-Cheng Cao ◽  
Yu-Lin Tang ◽  
...  
Keyword(s):  
Water Disinfection ◽  
E Coli ◽  
Uv Led ◽  
Led Irradiation

scholarly journals Application of Ultraviolet Light-Emitting Diodes (UV-LED) to Full-Scale Drinking-Water Disinfection

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1894 ◽  
Author(s):  
Jarvis ◽  
Autin ◽  
Goslan ◽  
Hassard
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Full Scale ◽  
Water Disinfection ◽  
Light Emitting ◽  
Uv Led ◽  
Drinking Water Disinfection ◽  
Inactivation Efficiency ◽  
Ultraviolet Light Emitting Diodes ◽  
Scale Reactor

Ultraviolet light-emitting diodes (UV-LEDs) have recently emerged as a viable technology for water disinfection. However, the performance of the technology in full-scale drinking-water treatment systems remains poorly characterised. Furthermore, current UV disinfection standards and protocols have been developed specifically for conventional mercury UV systems and so do not necessarily provide an accurate indication of UV-LED disinfection performance. Hence, this study aimed to test the hypothesis that a full-scale UV-LED reactor can match the Cryptosporidium inactivation efficiency of conventional mercury UV reactors. Male-specific bacteriophage (MS2) was used as the Cryptosporidium spp. surrogate microorganism. The time-based inactivation efficiency of the full-scale reactor was firstly compared to that of a bench-scale (batch-type) UV-LED reactor. This was then related to mercury UV reactors by comparing the fluence-based efficiency of the bench-scale reactor to the USEPA 90% prediction interval range of expected MS2 inactivation using mercury UV lamps. The results showed that the full-scale UV-LED reactor was at least as effective as conventional mercury UV reactors at the water-quality and drive-current conditions considered. Nevertheless, comparisons between the bench- and full-scale UV-LED reactors indicated that improvements in the hydraulic flow profile and power output of the full-scale reactor could help to further improve the efficiency of UV-LED reactors for municipal drinking water disinfection. This represents the world’s first full-scale UV-LED reactor that can be applied at municipal water treatment works for disinfection of pathogenic microorganisms from drinking water.

UV LED water disinfection: Validation and small system demonstration study

2019 ◽  
Vol 1 (4) ◽  
Author(s):  
Natalie M. Hull ◽  
William H. Herold ◽  
Karl G. Linden
Keyword(s):  
Water Disinfection ◽  
Small System ◽  
Uv Led

Comparison of UV-LED and low pressure UV for water disinfection: Photoreactivation and dark repair of Escherichia coli

2017 ◽  
Vol 126 ◽  
pp. 134-143 ◽  
Author(s):  
Guo-Qiang Li ◽  
Wen-Long Wang ◽  
Zheng-Yang Huo ◽  
Yun Lu ◽  
Hong-Ying Hu
Keyword(s):  
Escherichia Coli ◽  
Low Pressure ◽  
Water Disinfection ◽  
Dark Repair ◽  
Uv Led

Development of Silicon Wafer Packaging Technology for Deep UV LED

2020 ◽  
Vol 140 (7) ◽  
pp. 152-157
Author(s):  
Hirofumi Chiba ◽  
Yukio Suzuki ◽  
Yoshiaki Yasuda ◽  
Mitsuyasu Kumagai ◽  
Takaaki Koyama ◽  
...  
Keyword(s):  
Silicon Wafer ◽  
Packaging Technology ◽  
Uv Led ◽  
Deep Uv

REFERENCE UV LED SOURCES

2018 ◽  
Author(s):  
Siarhey Nikanenka ◽  
Evgenii Lutsenko ◽  
D.V. Scums ◽  
Mikalai Rzheutski ◽  
Aliaksandr Kreidzich ◽  
...  
Keyword(s):  
Uv Led

DISINFEKSI UNTUK PROSES PENGOLAHAN AIR MINUM

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Nusa Idaman Said
Keyword(s):  
Drinking Water ◽  
Water Purification ◽  
Distribution System ◽  
Residual Effect ◽  
Drinking Water Treatment ◽  
Disinfection Byproducts ◽  
Water Disinfection ◽  
Pathogenic Microorganisms ◽  
Microbiological Contamination ◽  
Disinfection Process

Water disinfection means the removal, deactivation or killing of pathogenic microorganisms. Microorganisms are destroyed or deactivated, resulting in termination of growth and reproduction. When microorganisms are not removed from drinking water, drinking water usage will cause people to fall ill. Chemical inactivation of microbiological contamination in natural or untreated water is usually one of the final steps to reduce pathogenic microorganisms in drinking water. Combinations of water purification steps (oxidation, coagulation, settling, disinfection, and filtration) cause (drinking) water to be safe after production. As an extra measure many countries apply a second disinfection step at the end of the water purification process, in order to protect the water from microbiological contamination in the water distribution system. Usually one uses a different kind of disinfectant from the one earlier in the process, during this disinfection process. The secondary disinfection makes sure that bacteria will not multiply in the water during distribution. This paper describes several technique of disinfection process for drinking water treatment. Disinfection can be attained by means of physical or chemical disinfectants. The agents also remove organic contaminants from water, which serve as nutrients or shelters for microorganisms. Disinfectants should not only kill microorganisms. Disinfectants must also have a residual effect, which means that they remain active in the water after disinfection. For chemical disinfection of water the following disinfectants can be used such as Chlorine (Cl2),  Hypo chlorite (OCl-), Chloramines, Chlorine dioxide (ClO2), Ozone (O3), Hydrogen peroxide etch. For physical disinfection of water the following disinfectants can be used is Ultraviolet light (UV). Every technique has its specific advantages and and disadvantages its own application area sucs as environmentally friendly, disinfection byproducts, effectivity, investment, operational costs etc. Kata Kunci : Disinfeksi, bakteria, virus, air minum, khlor, hip khlorit, khloramine, khlor dioksida, ozon, UV.

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