Application of Medium Pressure UV Lamp for Wastewater Disinfection of Milk Production Industry

2006 ◽  
Vol 6 (4) ◽  
pp. 731-734 ◽  
Author(s):  
H. Kamani ◽  
F. Vaezi . ◽  
R. Nabizadeh . ◽  
A.R. Mesdaghinia . ◽  
M. Alimohammadi .
Keyword(s):  
Milk Production ◽  
Medium Pressure ◽  
Wastewater Disinfection ◽  
Uv Lamp ◽  
Production Industry

scholarly journals Molecular Indications of Protein Damage in Adenoviruses after UV Disinfection

2010 ◽  
Vol 77 (3) ◽  
pp. 1145-1147 ◽  
Author(s):  
Anne C. Eischeid ◽  
Karl G. Linden
Keyword(s):  
Cell Culture ◽  
Viral Proteins ◽  
Low Pressure ◽  
Protein Damage ◽  
Uv Disinfection ◽  
Medium Pressure ◽  
The Difference ◽  
Uv Lamp ◽  
Detailed Work

ABSTRACTAdenoviruses are resistant to monochromatic, low-pressure (LP) UV disinfection—but have been shown to be susceptible to inactivation by polychromatic, medium-pressure (MP) UV—when assayed using cell culture infectivity. One possible explanation for the difference between UV lamp types is that the additional UV wavelengths emitted by MP UV enable it to cause greater damage to viral proteins than LP UV. The objective of this study was to examine protein damage in adenoviruses treated with LP and MP UV. Results show that MP UV is more effective at damaging viral proteins at high UV doses, though LP UV caused some damage as well. To our knowledge, this study is the first to investigate protein damage in UV-treated adenovirus, and the overview presented here is expected to provide a basis for further, more detailed work.

Photodegradation of sulphadimethoxine in water by medium pressure UV lamp

2008 ◽  
Vol 58 (5) ◽  
pp. 1147-1154 ◽  
Author(s):  
Y. Lester ◽  
I. Gozlan ◽  
D. Avisar ◽  
H. Mamane
Keyword(s):  
Reaction Rate ◽  
Uv Light ◽  
Acid Base ◽  
Direct Photolysis ◽  
Medium Pressure ◽  
Ph Values ◽  
Photodegradation Rate ◽  
Photodegradation Products ◽  
Uv Lamp ◽  
The Impact

The photodegradation rate of sulphadimethoxine (SMT) in water was studied under polychromatic UV light, in a bench scale apparatus. SMT photolysis was carried out at pH levels of 2.5, 6.5 and 10 to study the impact of acid base properties on the degradation of SMT. The highest SMT photolysis fluence based rate was found at pH = 2.5 (k=7.22 × 10−4 cm2/mJ) and the lowest rate at pH = 10 (k=4.72 × 10−4 cm2/mJ), thus the reaction rate decreases with an increase in pH between pH values of 2.5–10. Results indicated that direct photolysis is not satisfactory for degradation of SMT by polychromatic UV lamp as a fluence of approximately 7,000 mJ/cm2 is needed to break down 99% of SMT at pH 6.5. The photodegradation products of SMT were studied at various pH values. Photodegradation of SMT results in dissimilar relative amounts of intermediates formed at different pH values which may exert a photon demand and impact on SMT photodegradation rate.

scholarly journals Effect of medium-pressure UV-lamp treatment on disinfection by-products in chlorinated seawater swimming pool waters

2017 ◽  
Vol 599-600 ◽  
pp. 910-917 ◽  
Author(s):  
Waqas A. Cheema ◽  
Tarek Manasfi ◽  
Kamilla M.S. Kaarsholm ◽  
Henrik R. Andersen ◽  
Jean-Luc Boudenne
Keyword(s):  
Swimming Pool ◽  
Medium Pressure ◽  
Uv Lamp ◽  
By Products

Re-use of wastewater: preventing the recovery of pathogens by using medium-pressure UV lamp technology

2004 ◽  
Vol 50 (6) ◽  
pp. 337-344 ◽  
Author(s):  
B.F. Kalisvaart
Keyword(s):  
Wastewater Treatment Plants ◽  
Uv Light ◽  
Low Pressure ◽  
Energy Output ◽  
Uv Spectrum ◽  
Medium Pressure ◽  
Uv Lamp ◽  
Cellular Dna ◽  
Uv Technology ◽  
Term Performance

Ultraviolet (UV) light has become widely accepted as an alternative to chlorination or ozonation for wastewater disinfection. There are now over 2,000 wastewater treatment plants worldwide using either low- or medium-pressure UV technology. Recent studies investigating UV lamp technology, configuration, cleaning requirements and ageing, as well as long-term performance tests, have demonstrated beyond any doubt the effectiveness of UV in inactivating pathogens in wastewater. Research has also shown that, to ensure permanent inactivation and prevent the recovery of microorganisms following exposure to UV, a broad, “polychromatic” spectrum of UV wavelengths is necessary. These wavelengths inflict irreparable damage not only on cellular DNA, but on other molecules, such as enzymes, as well. Only medium-pressure UV lamps produce the necessary broad range of wavelengths; low-pressure lamps emit a single wavelength peak which only affects DNA. Polychromatic medium-pressure UV light is so effective because of the lampÕs exceptionally high UV energy output at specific wavelengths across the UV spectrum. It has been shown, for example, that pathogenic E. coli O175:H7 was able to repair the damage caused by low-pressure UV, but no repair was detected following exposure to UV from medium-pressure lamps.

Ultrasonic techniques for the milk production industry

Measurement ◽  
2014 ◽  
Vol 58 ◽  
pp. 93-102 ◽  
Author(s):  
Vahid Mohammadi ◽  
Mahdi Ghasemi-Varnamkhasti ◽  
Rahim Ebrahimi ◽  
Maryam Abbasvali
Keyword(s):  
Milk Production ◽  
Ultrasonic Techniques ◽  
Production Industry

scholarly journals Potential Repair of Escherichia coli DNA following Exposure to UV Radiation from Both Medium- and Low-Pressure UV Sources Used in Drinking Water Treatment

2002 ◽  
Vol 68 (7) ◽  
pp. 3293-3299 ◽  
Author(s):  
J. L. Zimmer ◽  
R. M. Slawson
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Water Treatment ◽  
Uv Radiation ◽  
Drinking Water Treatment ◽  
Low Pressure ◽  
Plate Count ◽  
Treatment Technology ◽  
Medium Pressure ◽  
Uv Lamp

ABSTRACT The increased use of UV radiation as a drinking water treatment technology has instigated studies of the repair potential of microorganisms following treatment. This study challenged the repair potential of an optimally grown nonpathogenic laboratory strain of Escherichia coli after UV radiation from low- and medium-pressure lamps. Samples were irradiated with doses of 5, 8, and 10 mJ/cm2 from a low-pressure lamp and 3, 5, 8, and 10 mJ/cm2 from a medium-pressure UV lamp housed in a bench-scale collimated beam apparatus. Following irradiation, samples were incubated at 37°C under photoreactivating light or in the dark. Sample aliquots were analyzed for up to 4 h following incubation using a standard plate count. Results of this study showed that E. coli underwent photorepair following exposure to the low-pressure UV source, but no repair was detectable following exposure to the medium-pressure UV source at the initial doses examined. Minimal repair was eventually observed upon medium-pressure UV lamp exposure when doses were lowered to 3 mJ/cm2. This study clearly indicates differences in repair potential under laboratory conditions between irradiation from low-pressure and medium-pressure UV sources of the type used in water treatment.

scholarly journals Low- or Medium-pressure UV Lamp Inactivation of Microcystis aeruginosa

2005 ◽  
Vol 3 (1) ◽  
pp. 55-61
Author(s):  
Hiroshi SAKAI ◽  
Kumiko OGUMA ◽  
Hiroyuki KATAYAMA ◽  
Shinichiro OHGAKI
Keyword(s):  
Microcystis Aeruginosa ◽  
Medium Pressure ◽  
Uv Lamp

Silver doping on TiO2 nanoparticles using a sacrificial acid and its photocatalytic performance under medium pressure mercury UV lamp

2009 ◽  
Vol 155 (3) ◽  
pp. 660-665 ◽  
Author(s):  
E. Pipelzadeh ◽  
A.A. Babaluo ◽  
M. Haghighi ◽  
A. Tavakoli ◽  
M. Valizadeh Derakhshan ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Photocatalytic Performance ◽  
Silver Doping ◽  
Medium Pressure ◽  
Uv Lamp

Influence of medium pressure UV lamp in hot tub water treatment on disinfection by-products concentration

2020 ◽  
Vol 199 ◽  
pp. 387-394
Author(s):  
Agnieszka Włodyka-Bergier ◽  
Tomasz Bergier
Keyword(s):  
Water Treatment ◽  
Medium Pressure ◽  
Uv Lamp ◽  
By Products
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