scholarly journals Disinfection of drinking water with ozone by the method of electrodispersion

2021 ◽  
Vol 939 (1) ◽  
pp. 012016
Author(s):  
Sh M Muzafarov ◽  
A G Babaev ◽  
O G Kilichov ◽  
L A Batirova
Keyword(s):  
Drinking Water ◽  
Water Disinfection ◽  
Technological Scheme ◽  
Artesian Wells

Abstract This article analyzes the existing methods for disinfecting drinking water with ozone and identifies their disadvantages. The substantiation of the method of water disinfection with ozone using electrodispersion is given. The description of the technological scheme of water disinfection using the method of electrodispersion is given. The description of the design of the electric spray is given. The results of production tests of a device for water disinfection on the water of open reservoirs and artesian wells are presented.

Pilot study of water disinfection using solar concentrators in rural communities

2004 ◽  
Vol 4 (5-6) ◽  
pp. 147-155 ◽  
Author(s):  
A. Martín-Domínguez ◽  
O. Fonseca-Moreno ◽  
A. González-Herrera ◽  
C.A. Estrada-Gasca ◽  
M.T. Alarcón-Herrera ◽  
...  
Keyword(s):  
Drinking Water ◽  
Rural Communities ◽  
Longitudinal Axis ◽  
Water Disinfection ◽  
Water Supply Systems ◽  
Solar Concentrators ◽  
Pilot Studies ◽  
Solar Disinfection ◽  
Direct Exposure ◽  
Artesian Wells

The efficiency of solar disinfection for the inactivation of Total Coliforms (TC) and Escherichia coli (EC) in drinking water was tested in two pilot studies performed in rural communities of the States of Chihuahua and Oaxaca, Mexico. The solar disinfection of drinking water (or photodisinfection) is an inexpensive alternative for easy application in rural communities. The study zones were selected mainly because they lack formal water supply systems and the population is forced to consume untreated water directly from rivers and shallow or artesian wells. The efficiency of the water disinfection process based on solar energy was determined in the dry and rainy seasons with water from the most contaminated sources in the study zones. The performed tests consisted of studying the effect of disinfecting water by direct exposure to sunlight during the whole day, with and without solar concentrators, in plastic bottles of commercial beverages. The three types of bottles used were transparent, partially painted black (one half of the bottle, along the longitudinal axis), and totally black. The study shows that, in these geographic zones, the available water must be disinfected before consumption, and disinfection efficiency can reach 100% through the use of solar radiation.

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.

Both viable and inactivated amoeba spores protect their intracellular bacteria from drinking water disinfection

2021 ◽  
Vol 417 ◽  
pp. 126006
Author(s):  
Zhenzhen He ◽  
Luting Wang ◽  
Yuexian Ge ◽  
Siyi Zhang ◽  
Yuehui Tian ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Disinfection ◽  
Intracellular Bacteria ◽  
Drinking Water Disinfection

Mammalian cell cytotoxicity and genotoxicity analysis of drinking water disinfection by-products

2002 ◽  
Vol 40 (2) ◽  
pp. 134-142 ◽  
Author(s):  
Michael J. Plewa ◽  
Yahya Kargalioglu ◽  
Danielle Vankerk ◽  
Roger A. Minear ◽  
Elizabeth D. Wagner
Keyword(s):  
Drinking Water ◽  
Mammalian Cell ◽  
Water Disinfection ◽  
Cell Cytotoxicity ◽  
Drinking Water Disinfection ◽  
By Products

Detection of genotoxic effects of drinking water disinfection by-products using Vicia faba bioassay

2016 ◽  
Vol 24 (2) ◽  
pp. 1509-1517 ◽  
Author(s):  
Yu Hu ◽  
Li Tan ◽  
Shao-Hui Zhang ◽  
Yu-Ting Zuo ◽  
Xue Han ◽  
...  
Keyword(s):  
Drinking Water ◽  
Vicia Faba ◽  
Water Disinfection ◽  
Genotoxic Effects ◽  
Drinking Water Disinfection ◽  
By Products

scholarly journals Balancing the risks and benefits of drinking water disinfection: disability adjusted life-years on the scale.

2000 ◽  
Vol 108 (4) ◽  
pp. 315-321 ◽  
Author(s):  
A H Havelaar ◽  
A E De Hollander ◽  
P F Teunis ◽  
E G Evers ◽  
H J Van Kranen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Disinfection ◽  
Disability Adjusted Life Years ◽  
Risks And Benefits ◽  
Disability Adjusted Life ◽  
Life Years ◽  
Drinking Water Disinfection

scholarly journals KUALITAS BAKTERIOLOGI AIR MINUM ISI ULANG DITINJAU DARI METODE DISINFEKSI YANG DIGUNAKAN DI KABUPATEN NGAWI

2017 ◽  
Vol 13 (3) ◽  
Author(s):  
Suhadi Prayitno
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
Total Coliform ◽  
Water Disinfection ◽  
Cluster Sampling ◽  
Bacteriological Quality ◽  
Consumer Protection Act ◽  
Key Word ◽  
Reduction Percentage

Cases, concerns and complaints in public about refill drinking water,  low businessmen DAMIU are checked routinely product processed as well as the mandate of the Consumer Protection Act, Kepmerindag RI and Permenkes RI on monitoring refill drinking water background for the author to conduct research. Purpose to describe the bacteriological quality of refill drinking water in terms of disinfection method used in District Ngawi. This method is descriptive study and cluster sampling to 49 samples DAMIU in District Ngawi with the results of the method used, namely ultraviolet disinfection, ozonation and reverse  osmosis. The results bacteriological quality (total coliforms) of any disinfection method shows a different picture, which shows the method of disinfection reverse osmosis bacteriological quality with the percentage of 50.00%, followed by ozonation method of 46.15% and the latter by the ultraviolet method percentage value 44.12 %. The ability of any reduction in total coliform disinfection method shows a different picture, in which the reverse osmosis method of disinfection showed total coliform reduction percentage of 94.08%, followed by ozonation method of 91.46% and the latter by the ultraviolet method percentage value 86.09%. The conclusion willingness, support and cooperation of all stakeholders is needed to improve the supervision, guidance and inspection of the quality of refill drinking water in Ngawi. Key word : water, disinfection, coliform

scholarly journals Assessing efficiency of pre-ammonization aimed at reducing carcinogenic risks caused by trihalomethanes in drinking water

2020 ◽  
pp. 70-77
Author(s):  
L.A. Deryabkina ◽  
◽  
B.I. Marchenko ◽  
N.K. Plugotarenko ◽  
A.I. Yukhno ◽  
...  
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Natural Water ◽  
Water Source ◽  
Water Disinfection ◽  
Residual Chlorine ◽  
Gas Liquid Chromatography ◽  
Initial Water ◽  
Organic Chlorine ◽  
Deep Purification

In most Russian regions there is still a pressing issue related to providing population with high quality and safe drinking water. Up to now, chlorination has been the primary technique applied to disinfect drinking water as it is highly efficient, reliable, and relatively cheap. However, when chlorine is used to disinfect natural water that contains organic pollutants, it results in risks of by-products occurrence. These products are trihalomethanes, epigenetic carcinogenesis promoters that cause elevated carcinogenic risks under oral, inhalation, and subcutaneous exposure. Our research goal was to hygienically assess efficiency of pre-ammonization applied in water treatment procedures in order to prevent occurrence of carcinogenic organic chlorine compounds during chlorination and to minimize carcinogenic risks. We determined trihalomethanes and residual chlorine contents in model samples of natural water taken from a surface water source after chlorination with different doses of chlorine. We examined 52 pair parallel samples that had undergone pre-ammonization with ammonia sulfate and control ones. Trihalomethanes concentrations were determined in model water samples with gas-liquid chromatography. Basing on the results obtained via experiments on laboratory chlorination of river water, we determined quantitative characteristics and built regression models showing dependence between concentrations of organic chlorine compounds occurring due to chlorination (chloroform, dichlorobrommethane, dibromchloromethane) and chlorine doses and preammonization parameters. It was established that pre-ammonization was the most efficient in terms of preventing trihalomethanes occurrence under such disinfection modes when contents of residual active chlorine didn’t exceed recommended levels (0.8–1.2 mg/L). Basic ways to minimize carcinogenic risks caused by trihalomethanes are systemic control over their contents in drinking water during social and hygienic monitoring procedures; preliminary ammonization of water taken from surface water sources; prevention of unjustified hyper-chlorination; preliminary deep purification of initial water; disinfection with ultrasound radiation instead of preliminary chlorination; etc.

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