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

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

scholarly journals IMPACT OF THE UV LAMP POWER ON THE FORMATION OF SWIMMING POOL WATER TREATMENT BY-PRODUCTS

2018 ◽  
Vol 11 (3) ◽  
pp. 131-138
Author(s):  
Edyta KUDLEK ◽  
Anna LEMPART ◽  
Mariusz DUDZIAK ◽  
Marta BUJAK
Keyword(s):  
Water Treatment ◽  
Swimming Pool ◽  
Pool Water ◽  
Swimming Pool Water ◽  
Uv Lamp ◽  
By Products

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 Colour Changes during the Carbamazepine Oxidation by Photo-Fenton

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 386
Author(s):  
Natalia Villota ◽  
Cristian Ferreiro ◽  
Hussein Ahmad Qulatein ◽  
Jose María Lomas ◽  
Luis Miguel Camarero ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Internal Structure ◽  
Fenton Reagent ◽  
Medium Pressure ◽  
Colour Changes ◽  
Uv Lamp ◽  
By Products

The oxidation of aqueous solutions of carbamazepine is conducted using the Fenton reagent, combined with the photolytic action of a 150 W medium pressure UV lamp, operating at T = 40 °C. The effect of acidity is analysed at an interval pH = 2.0–5.0, verifying that operating at pH = 5.0 promotes colour formation (Colour = 0.15 AU). The effect of iron is studied, finding that the colour of the water increases in a linear way, Colour = 0.05 + 0.0075 [Fe]0. The oxidising action of hydrogen peroxide is tested, confirming that when operating with [H2O2]0 = 2.0 mM, the maximum colour is generated (Colourmax = 0.381 AU). The tint would be generated by the degradation of by-products of carbamazepine, which have chromophoric groups in their internal structure, such as oxo and dioxocarbazepines, which would produce tint along the first minutes of oxidation, while the formation of acridones would slowly induce colour in the water.

scholarly journals Formation of DBPs in the drinking eater of Athens, Greece: a Ten-Year study

2013 ◽  
Vol 7 (1) ◽  
pp. 106-118
Keyword(s):  
European Union ◽  
Drinking Water ◽  
Water Treatment ◽  
Chloral Hydrate ◽  
Haloacetic Acids ◽  
The European Union ◽  
Water Treatment Plants ◽  
Naturally Occurring ◽  
By Products ◽  
The Eu

The formation of Disinfection By-Products (DBPs) in drinking water results from the reaction of chlorine or other disinfectants added to the water with naturally occurring organic materials, and has raised concerns during the last decades because these compounds are harmful for human health. During the present work, the formation of different categories of DBPs was investigated in four water treatment plants (WTP) using chlorine as disinfectant, and in selected points of the distribution network of Athens, Greece, which is supplied from these four WTP, during a period of ten years. The concentrations of DBPs were generally low and the annual mean concentrations always well below the regulatory limit of the European Union (EU) for the total trihalomethanes (TTHMs). The haloacetic acids (HAAs) have not been regulated in the EU, but during this investigation they often occurred in significant levels, sometimes exceeding the levels of TTHMs, which highlights the importance of their monitoring in drinking water. Apart from THMs and HAAs, several other DBPs species were detected at much lower concentrations in the chlorinated waters: chloral hydrate, haloketones and, in a limited number of cases, haloacetonitriles.

Characterization of organic matter and disinfection by-products in membrane backwash water from drinking water treatment

2009 ◽  
Vol 168 (2-3) ◽  
pp. 753-759 ◽  
Author(s):  
Lingling Zhang ◽  
Ping Gu ◽  
Zijie Zhong ◽  
Dong Yang ◽  
Wenjie He ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
By Products

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

Emerging investigators series: disinfection by-products in mixed chlorine dioxide and chlorine water treatment

2016 ◽  
Vol 2 (5) ◽  
pp. 838-847 ◽  
Author(s):  
Wenhui Gan ◽  
Huang Huang ◽  
Xin Yang ◽  
Ziru Peng ◽  
Guanghao Chen
Keyword(s):  
Water Treatment ◽  
Chlorine Dioxide ◽  
By Products ◽  
Chlorine Water

On-site generation of ClO2often involves the production of Cl2as impurity and the changes of disinfection by-products formation by mixed disinfectant (ClO2/Cl2) was presented.

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