scholarly journals Performance application of ultraviolet disinfection technique for raw water

2021 ◽  
Vol 1895 (1) ◽  
pp. 012036
Author(s):  
Zainab Osama Nazar ◽  
Nawar O.A. Al-Musawi
Keyword(s):  
Ultraviolet Disinfection ◽  
Raw Water

Aplikasi metode tahanan jenis dalam studi geologi karst Gua Seropan di Gunung Kidul, Yogyakarta

2017 ◽  
Vol 12 (2) ◽  
pp. 105-116
Author(s):  
Pulung A. Pranantya ◽  
Nurlia Sadikin
Keyword(s):  
Fresh Water ◽  
Ground Surface ◽  
Water Source ◽  
Raw Water ◽  
Limited Information ◽  
Resistivity Method ◽  
Central Java ◽  
Underground River ◽  
Initial Exploration

In terms of geology, most areas in south of the Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the existence of underground river in caves, however, indicate the potential amount of water within the area, especially in the eastern part of the Gunungkidul District. Although limited information available, some fishermen have discovered that Seropan cave contains fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using a multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The isopach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results, i.e. 110o2223.6388 EL 8o42.874 SL. [DY1][PP2][DY1]Perbaiki grammarIn terms of geology, most areas in south of Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the exixtence of underground river in caves, however, indicate potential amount of water within the area especially in eastern part of Gunungkidul District. Although limited information available, some fishermans has discovered that Seropan cave contain fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The iso pach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results i.e. 110o2223.6388 EL 8o42.874 SL.[PP2]Sudah diperbaiki

ORGANIZATIONAL MEASURES FOR SPECIAL TRANSPORT PROCESSING USED FOR CONVICTS AND PERSONS IN CUSTODY ESCORTING INCLUDING PATIENTS WITH INFECTIOUS DISEASES

2020 ◽  
pp. 43-47
Author(s):  
Валерий Викторович Кубанов
Keyword(s):  
Infectious Diseases ◽  
Ultraviolet Radiation ◽  
Selection Criteria ◽  
Legal Regulation ◽  
Ultraviolet Disinfection ◽  
Physical Methods ◽  
Combined Use ◽  
Coronavirus Infection ◽  
Hygienic Conditions

В статье анализируются вопросы правового регулирования и организации мероприятий по обработке специального транспорта, используемого для конвоирования осужденных и лиц, содержащихся под стражей, в целях недопущения распространения заболеваний, вызванных новой коронавирусной инфекцией (COVID-19). Охарактеризована правовая регламентация санитарно-гигиенической и противоэпидемиологической деятельности в условиях учреждений, обеспечивающих изоляцию от общества. Показан комплекс проблем, связанных с обеспечением необходимых санитарно-гигиенических условий при перевозках осужденных и лиц, содержащихся под стражей. Исследован вопрос о критериях отбора дезинфицирующего средства, применяемого для обработки специального транспорта. Сформулированы дополнительные требования, предъявляемые к дезинфицирующим средствам, в современных условиях распространения новой коронавирусной инфекции (COVID-19). Сделан вывод о целесообразности сочетания химических и физических способов проведения дезинфекции. Предложено комбинированное использование химических аэрозольных методов и физических ультрафиолетовых дезинфекционных технологий, реализуемых посредством бактерицидных облучателей-рециркуляторов воздуха, предназначенных для обеззараживания воздуха ультрафиолетовым излучением в различных закрытых пространствах, включая салоны транспортных средств. Затронуты вопросы организации дезинфекционных пунктов в учреждениях уголовно-исполнительной системы Самарской области. The article analyzes the issues of legal regulation and organization of measures for processing special transport used for convicts and persons in custody escorting in order to prevent the spread of diseases caused by a new coronavirus infection (covid-19). The article describes the legal regulation of sanitary-hygienic and antiepidemiological activities in institutions that provide isolation from society. The complex of problems related to ensuring the necessary sanitary and hygienic conditions during transportation of convicts and persons in custody is shown. The question of the selection criteria for the disinfectant used for the treatment of special transport is investigated. Additional requirements for disinfectants are formulated in the current conditions of the spread of a new coronavirus infection (COVID-19). The conclusion is made about the expediency of combining chemical and physical methods of disinfection. The combined use of chemical aerosol methods and physical ultraviolet disinfection technologies implemented by means of bactericidal irradiators-air recirculators designed for disinfection of air with ultraviolet radiation in various enclosed spaces, including vehicle interiors, is proposed The issues of organization of disinfection points in institutions of the penitentiary system of the Samara region were discussed.

The effect of the molecular mass of the organic matter in raw water on the formation of disinfection by-products

2001 ◽  
Vol 50 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Chen-Yu Chang ◽  
Yung-Hsu Hsieh ◽  
Yu-Min Lin ◽  
Po-Yu Hu ◽  
Chin-Chuan Liu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Molecular Mass ◽  
Raw Water ◽  
By Products

Leading the City of Baltimore into the 21st Century: Flexible Treatment Solutions and Integrated Raw Water Management

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
J. L. Manuszak ◽  
M. MacPhee ◽  
S. Liskovich ◽  
L. Feldsher
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Water Supply ◽  
Conceptual Design ◽  
Membrane Filtration ◽  
Treatment Plant ◽  
Low Pressure ◽  
Management Tool ◽  
Raw Water ◽  
The City

The City of Baltimore, Maryland is one of many US cities faced with challenges related to increasing potable water demands, diminishing fresh water supplies, and aging infrastructure. To address these challenges, the City recently undertook a $7M study to evaluate water supply and treatment alternatives and develop the conceptual design for a new 120 million gallon per day (MGD) water treatment plant. As part of this study, an innovative raw water management tool was constructed to help model source water availability and predicted water quality based on integration of a new and more challenging surface water supply. A rigorous decision-making approach was then used to screen and select appropriate treatment processes. Short-listed treatment strategies were demonstrated through a year-long pilot study, and process design criteria were collected in order to assess capital and operational costs for the full-scale plant. Ultimately the City chose a treatment scheme that includes low-pressure membrane filtration and post-filter GAC adsorption, allowing for consistent finished water quality irrespective of which raw water supply is being used. The conceptual design includes several progressive concepts, which will: 1) alleviate treatment limitations at the City's existing plants by providing additional pre-clarification facilities at the new plant; and 2) take advantage of site conditions to design and operate the submerged membrane system by gravity-induced siphon, saving the City significant capital and operations and maintenance (O&M) costs. Once completed, the new Fullerton Water Filtration Plant (WFP) will be the largest low-pressure membrane plant in North America, and the largest gravity-siphon design in the world.

Optimisation of coagulation and chlorination in drinking water treatment: laboratory and full-scale studies

2002 ◽  
Vol 2 (2) ◽  
pp. 131-137
Author(s):  
N.D. Basson ◽  
C.F. Schutte
Keyword(s):  
Water Quality ◽  
Large Fraction ◽  
Drinking Water Treatment ◽  
Agricultural Runoff ◽  
Treatment Costs ◽  
Full Scale ◽  
Raw Water ◽  
Activated Carbon Adsorption ◽  
Treated Effluent ◽  
Quality Optimisation

The paper deals with laboratory and full-scale studies aimed at optimising treatment processes at the Balkfontein plant of Sedibeng Water in South Africa. The raw water is highly eutrophic and contains a large fraction of treated effluent from domestic and industrial sources as well as agricultural runoff. The eutrophic nature and changing raw water quality give rise to many operational difficulties and high treatment costs as well as problems with the final water quality. Optimisation of the coagulation and chlorination processes was seen as a cheaper solution to these problems than to install advanced processes such as ozonation and activated carbon adsorption that would add greatly to treatment costs. The laboratory studies indicated that through optimisation of coagulation-flocculation and by replacement of pre-chlorination by intermediate chlorination (after primary sedimentation) most of the treatment problems could be solved and final water of the required quality produced without a large increase in treatment costs.

Enteric viruses in drinking water supplies

2002 ◽  
Vol 2 (3) ◽  
pp. 17-22
Author(s):  
A.P. Wyn-Jones ◽  
J. Watkins ◽  
C. Francis ◽  
M. Laverick ◽  
J. Sellwood
Keyword(s):  
Drinking Water ◽  
Heavy Rainfall ◽  
Liquid Culture ◽  
Plaque Assay ◽  
Enteric Viruses ◽  
Enteric Virus ◽  
The Other ◽  
Raw Water ◽  
Rt Pcr ◽  
Water Supplies

Two rural spring drinking water supplies were studied for their enteric virus levels. In one, serving about 30 dwellings, the water was chlorinated before distribution; in the other, which served a dairy and six dwellings the water was not treated. Samples of treated (40 l) and untreated (20 l) water were taken under normal and heavy rainfall conditions over a six weeks period and concentrated by adsorption/elution and organic flocculation. Infectious enterovirus in concentrates was detected in liquid culture and enumerated by plaque assay, both in BGM cells, and concentrates were also analysed by RT-PCR. Viruses were found in both raw water supplies. Rural supplies need to be analysed for viruses as well as bacterial and protozoan pathogens if the full microbial hazard is to be determined.

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