ultraviolet water Articles
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Theoretical operation of high-efficiency ultraviolet water treatment chamber
The NeoTech Aqua ReFleX water purification chambers are the most efficient and compact units available today. They require an order of magnitude less energy and less than 25% of the system volume to achieve the same or better purification result as competing chambers. This is the first in a series of three white papers explaining the benefits of these systems. This paper explains in detail the ...
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Disinfection performance testing of high-efficiency ultraviolet water treatment chamber
When introducing a disinfection product which incorporates new technology, it is essential that the methods and testing used to quantify the performance of those systems follow protocols which are technically sound and which are accepted by the scientific and technical community within the industry. These protocols must be applied precisely and rigorously in order to ensure accurate, repeatable ...
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Unique Ozone and Ultraviolet Water Treatment System
Euroby Ltd, the sludge treatment specialists, are pleased to announce the signing of an agreement to be the sole UK and Ireland distributor for the unique UVOX range of water treatment systems.UVOX, as the name suggests, uses a combination of Ultraviolet and Ozone to treat infected and polluted water.Its uniqueness stems from its novel method of first producing ozone by irradiating air with a ...
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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
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Methodological considerations when conducting bench scale polychromatic ultraviolet irradiation of water
The use of a bench scale apparatus (often referred to as a ‘collimated beam’) to apply fluences to water samples is common practice in disinfection research and in validating the performance of full-scale UV disinfection reactors. This study investigated the sources of potential experimental variations in the calculation of fluence when conducting polychromatic collimated beam ...
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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 ...
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Degradation of 2-chloropyridine in water by ultraviolet and ultrasound irradiation
The degradation of 2-chloropyridine in synthetic aqueous solutions by means of ultraviolet and ultrasound irradiation has been investigated. The effect of varying operating conditions (initial substrate concentrations from 100–500 mg/l, temperatures from 5–50°C and liquid volumes from 50–500 ml) on degradation efficiency was evaluated. Light irradiation was generally more effective than ...
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atg UV provide solution to chemical balance in swimming pool applications - Case Study
Client: Gloucester Institute of Technology Location: Gloucester, USA Service: Swimming Pool UV Disinfection Description: atg UV provide solution to poor water quality due to high levels of chloramines. The Gloucester Institute of Technology has chosen a state-of-the-art atg UV Technology Ultraviolet water treatment system for its on campus swimming and leisure facility as a solution to its ...
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Computational modeling of ultraviolet disinfection
The efficient design of ultraviolet light (UV) systems for water and wastewater treatment requires detailed knowledge of the patterns of fluid motion that occur in the disinfection channel. This knowledge is increasingly being obtained using Computational Fluid Dynamics (CFD) software packages that solve the equations governing turbulent fluid-flow motion. In this work, we present predictions of ...
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Development of a preconcentration method for indomethacin in natural waters using dispersive liquid–liquid microextraction based on solidification of floating organic drop technique
A new dispersive liquid–liquid microextraction method based on the solidification of a floating organic drop was developed for the preconcentration of indomethacin in natural waters followed by ultraviolet-visible (UV-Vis) spectrophotometric detection. 1-undecanol and ethanol were used as the extraction solvent and the disperser solvent, respectively. An investigation of the main experimental ...
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Effects of salinity on photoreactivation of
Escherichia coli after UV disinfectionThe effects of sodium chloride on photoreactivation of Escherichia coli were examined, assuming the discharge of ultraviolet (UV)-treated wastewater to water environment at different salinities. Suspensions of E. coli were first exposed to a low-pressure UV lamp in phosphate buffer to achieve 3 log inactivation, followed by an exposure to fluorescent light in NaCl solutions at the concentration ...
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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 ...
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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 ...
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A pulsed light system for the disinfection of flow through water in the presence of inorganic contaminants
The use of ultraviolet (UV) light for water disinfection has become increasingly popular due to on-going issues with drinking water and public health. Pulsed UV light has proved to be an effective form of inactivating a range of pathogens including parasite species. However, there are limited data available on the use of pulsed UV light for the disinfection of flowing water in the absence or ...
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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 ...
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Water Treatment
Water treatment is performed in order to improve water quality. The processes employed for water treatment depend on the quality of the water supply. In all cases, water has to be disinfected in order to deactivate any existing microorganisms present in water. So far, this technique was proved to be the most important for the protection of human life. It is commonly done using chlorine or ...
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Urban wastewater reuse: a pilot plant experience
The results of a preliminary verification of domestic wastewater reusability in L'Aquila (Italy) are reported. A Tertiary Treatment Pilot Plant (TTPP), rotary filtration and Ultraviolet (UV) Radiation disinfection, was added to an Urban WasteWater Treatment Plant (UWWTP) to test the compliance with water quality indicated for reuse by the enforced Italian regulation. The TTPP was managed varying ...
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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 ...
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The influence of reaction conditions in the oxidation of organic compounds of nuclear laundry water by ozone
This paper presents a summary of degrading organic compounds of nuclear laundry water by ozonation in different conditions of pH, hydrogen peroxide and ultraviolet radiation. The degradation of organic compounds was analysed by chemical oxygen demand (COD), total organic carbon (TOC) and biochemical oxygen demand (BOD). The optimal degradation conditions were at pH 7 with ozone, UV radiation and ...
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Investigation of surface and filtration properties of TiO2 coated ultrafiltration polyacrylonitrile membranes
In the present work, the surface and filtration properties of TiO2 coated polyacrylonitrile ultrafiltration membranes were investigated. The membranes were coated using the physical deposition method. The appropriate TiO2 coverage proved to be 0.3 mg/cm2, which formed a hydrophilic cake layer on the membrane surface. The cleanability without chemicals and the retention of the coated membranes ...
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