Showing results for: ultraviolet water Articles
-
Importance of measuring UV transmittance (UVT) for UV disinfection
UV disinfection systems disinfect water using UV light at the 254 nm wavelength. UV light at this wavelength actually destroys the DNA of microbiological material in the water which prevents dangerous viruses such as cryptosporidium and e-coli from reproducing and causing harm. UV Disinfection Dose and UV Transmittance (UVT) The effectiveness of a UV disinfection system is determined by the UV ...
-
Everything You Need to Know About UV Water Purification
If you draw water from a well or lake and are concerned about its quality, a UV Water purification system might give you the peace of mind your water is safe to use. Households on municipal water systems are not completely safe either, as water main breaks and broken pipes which can lead to water contamination occur frequently. The ultraviolet water purification process uses ultraviolet light or ...
By AquaBSafe
-
Fluorescence characteristics of natural organic matter in water under sequential exposure to UV irradiation/chlor(am)ination
The organic matter in International Humic Substances Society Natural Organic Matter (IHSS NOM) water exposed to ultraviolet (UV) irradiation and chlor(am)ine sequentially under practically relevant conditions was characterized based on fluorescence spectra. IHSS NOM water exposed to UV irradiation or chlor(am)ine alone was also evaluated. Both chlor(am)ine alone and UV/chlor(am)ine exposure ...
-
Experimental study of the degradation of 2,4-D induced by vacuum-UV radiation
Vacuum-UV (VUV) photoinduced degradation of the herbicide 2,4-D was studied. A flow-through VUV photoreactor was used (i) in batch mode to study the kinetics of degradation and (ii) in continuous mode under steady state to analyze the potential utilization of this process in commercial applications. In both cases, the reactants were recycled to minimize diffusive resistances. Experimental results ...
-
Determination of water supply sources in the Barcelona distribution system by UV spectrophotometry and PLS
A new method for the water source apportionment of the Barcelona (Spain) water distribution system is proposed. The method is based on the combined use of UV spectrophotometric measurements in the wavelength from 190–230 nm, and multivariate data analysis using the Partial Least Squares (PLS) chemometric method. From the differences in the organic matter content of the different water sources and ...
-
Comparison of ultraviolet light emitting diodes with traditional UV for greywater disinfection
The current technological status of ultraviolet light emitting diodes (UV-LEDs) has reached a point where small-scale ultraviolet (UV) water disinfection applications, that is, for greywater reuse appear increasingly promising. This study compares the germicidal and economical aspects of UV-LEDs with traditional UV. Pure cultures and environmental greywater samples were exposed to different ...
-
Digital UV Inkjet Printing on Metal Sheet
JSW uv flatbed printer manufacturers is dedicated to practicing the technology of digital printing on metal sheet for a long time, especially the uv printing on stainless steel and uv printing on aluminum. Our hot-sale F2513G/F3020G JSW Industrial Level UV Flatbed Printer, F2513G-Pro JSW Industrial UV Flatbed Printer and F3220G JSW Industrial Large Format Flatbed UV Printer, can be used as the ...
-
Rand water - Case Study
Client: Rand Water, South Africa Location: Zuurbekom, Gauteng, South Africa Description: Potable Drinking Water atg UV Technology, pioneers in the design and engineering of Ultraviolet treatment systems have supplied Rand Water, South Africa's largest supplier of potable water to the Gauteng area with a state-of-the-art compact, closed chamber, Ultraviolet disinfection system for the ...
-
Self-Cleaning Filters for Pretreatment of Membrane and UV Water Treatment Systems
The removal of suspended solids is necessary to protect membrane systems and prevent the “shadow effect” in ultraviolet (UV) treatment systems. Recent field data has shown the effectiveness of automatic self-cleaning filters in removing suspended solids down to less than 3 microns in size without flocculants, pre-coats or granulated media. Tests have demonstrated the complete removal of ...
-
Photocatalytic degradation of MC-LR in water by the UV/TiO2/H2O2 process
The ultraviolet (UV)/titanium dioxide (TiO2)/hydrogen peroxide (H2O2) process (UTHP) has been proven to be effective in removing organics because of its high production of free radicals. In this study, UTHP was further investigated for the photocatalytic degradation of microcystin-LR (MC-LR). Results showed that three mechanisms could realize MC-LR photocatalytic degradation using TiO2. H2O2 ...
-
Method to determine the power efficiency of UV disinfection plants and its application to low pressure plants for drinking water
In this paper we present a method to determine the power efficiency of ultraviolet (UV) disinfection plants and apply this to low pressure plants for drinking water. In UV disinfection plants the water flow is regulated to ensure that microorganisms receive the necessary fluence for inactivation while passing through. The flow depends on the UV transmission (UVT) of the water. The lower the ...
-
Water Reclamation – NEWater Singapore
Hanovia Photon UV Systems Bedok NEWater Water Reclamation Plant (WRP) - Pilot Plant – 420m3/hr Bedok NEWater WRP - Full Scale Plant – 1,335m3/hr Kranji NEWater WRP - Full Scale Plant – 1,667m3/hr Bedok NEWater WRP – Pilot Plant - 3 x PMD320F2 Photon Systems (above) Bedok NEWater WRP – Full Scale Plant 3 x PMD321K6 Photon Systems Kranji NEWater WRP – 3 x PMD361K6 Photon Systems ...
-
UV Photolysis of Nitrate: Effects of Natural Organic Matter and Dissolved Inorganic Carbon and Implications for UV Water Disinfection
Nitrite (NO2-) formation during ultraviolet (UV) photolysis of nitrate was studied as a function of pH and natural organic matter (NOM) concentration to determine water-quality effects on quantum yields and overall formation potential during UV disinfection of drinking water with polychromatic, medium-pressure (MP) Hg lamps. Quantum yields measured at 228 nm are approximately 2 times higher than ...
-
A computational fluid dynamics analysis of placing UV reactors in series
Ultraviolet (UV) light water treatment reactors are commonly used in both wastewater and drinking water disinfection. UV technology can effectively inactivate a large number of pathogens at low UV doses, however adenovirus requires a substantially higher dose than most pathogens of interest. In order to meet adenovirus inactivation requirements, UV reactors are often placed in series and the ...
-
Emergency Rental Solutions for the Effective Treatment of Municipal Drinking Water. Case Study
As specialists in UV disinfection for the municipal drinking water market, atg UV Technology offer a range of mobile, containerised, turn-key UV disinfection plants and standard medium pressure systems. Designed to meet the requirements of the UK DWI (Drinking Water Inspectorate) February 2010 Guidelines on UV Disinfection for Potable Water Supplies, the atg UV Technology design provides a ...
-
Preparation of ZnO, ZnFe2O4 and ZnO-SnO2 nanocrystals and investigation of their photocatalytic activity
This paper reports the preparation and investigation of photocatalytic activity of ZnO, ZnFe2O4 and ZnO-SnO2 nano-crystals. Using precipitation and coprecipitation methods, zinc oxide nanocrystals and nano scale binary mixed oxide ZnO-SnO2 were synthesised. Brown nanoscale composite zinc ferrite with spinel structure was prepared using co-precipitation method. The products were characterised by ...
-
Degradation of a mixture of pollutants in water using the UV/H2O2 process
The degradation reaction of a simple mixture of pollutants (dichloroacetic acid + formic acid) employing H2O2 and UVC radiation (253.7 nm) has been studied in a well-mixed reactor which operates inside a recycling system. The aim of this work is to develop a systematic methodology for treating degradation of mixtures of pollutants, starting from a rather manageable system to more complex ...
-
Water matrix effect on UV photodegradation of perfluorooctanoic acid
The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high stability. Photochemical techniques using particularly ...
-
Study on synthesis and photocatalytic activity of novel visible light sensitive photocatalyst Ag
3PO4Silver orthophosphate nanoparticles have been synthesised by precipitation of AgNO3 and H3PO4 in presence of oleylamine and other solvents like toluene, and ethanol at room temperature. Particle sizes of silver orthophosphate nanocrystals can be controlled by adjusting the amount of water. The products were characterised by XRD, UV–Vis, FESEM and EDX. The characterisation results showed that the ...
-
Benefits of high energy UV185 nm light to inactivate bacteria
Inactivating and eliminating bacteria from ultra pure water (UPW) systems is always a significant problem for semiconductor and pharmaceutical industries. To alleviate the problem, ultraviolet (UV) radiation—both monochromatic UV254 light and high pressure UV185 light—is traditionally used for bacterial sterilization and in the case of the later, breakdown of trace organic molecules. The focus of ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you