Chlorine Dioxide Water Articles on Environmental XPRT

Chlorine

Due to the complexity of chlorine chemistry, the activity and forms of chlorine is not well understood. Its reactions are not always 'predictable' and are somewhat unique. This memo is intended to provide some simple insight of the most common forms of chlorine that we at Osmonics® encounter. The most basic form of chlorine is Chlorine Gas (Cl2). This is usually the cheapest form of chlorination, ...

Jan. 1, 2000

By GE Water & Process Technologies

Reference: Clever water recycling with chlorine dioxide

Vapour water at the Crailsheim-Dinkelsbühl dairy is disinfected and then returned to the production process by means of a chlorine dioxide system. The great news is that this significantly reduces water consumption and operating costs. Fewer costs The 160 members of staff at the diary "Milchwerk Crailsheim-Dinkelsbühl eG" process around 130,000 tonnes of milk a year, ...

Jan. 18, 2016

By ProMinent Group - ProMinent GmbH

Inactivation of particle-associated Escherichia coli with chlorine dioxide

In this paper, the inactivation of both free Escherichia coli (FE) and particle-associated E. coli (PAE) with chlorine dioxide (ClO2) were investigated using granular activated carbon effluent water samples. The inactivation rate of FE was higher than that of PAE and the reactivation ratio of PAE was higher than that of FE, indicating the threat of ...

Jul. 26, 2016

By IWA Publishing

Simultaneous reduction of by-products of chlorine dioxide and chlorine using Fe(II)–Al(III) coagulant mixture

Ferrous iron has been considered very useful for removal of chlorite, a by-product of chlorine dioxide. However, a serious problem can occur associated with high residual iron concentrations in water after Fe(II) treatment, especially at weak acidic condition (pH 6), having a higher capacity of chlorite reduction. Simultaneous removal of chlorite, dissolved iron, and humic acids was achieved with ...

Jan. 1, 2011

By IWA Publishing

Comparison of commercial analytical techniques for measuring chlorine dioxide in urban desalinated drinking water

Most drinking water industries are closely examining options to maintain a certain level of disinfectant residual through the entire distribution system. Chlorine dioxide is one of the promising disinfectants that is usually used as a secondary disinfectant, whereas the selection of the proper monitoring analytical technique to ensure disinfection and regulatory compliance has been debated ...

Jul. 14, 2015

By IWA Publishing

Modeling and analysis of chlorine dioxide, chlorite, and chlorate propagation in a drinking water distribution system

The drinking water distribution system of Cremona, in the north of Italy, was monitored for 6 years (2006–2011) analyzing chlorine dioxide, chlorite, and chlorate concentrations. The software Epanet 2.0 (USEPA) was applied to the distribution system. The mixing zone of the water coming from the two drinking water treatment plants, respectively located to the west and east of the city, was ...

Oct. 19, 2016

By IWA Publishing

How can drinking water treatments influence chlorine dioxide consumption and by-product formation in final disinfection?

In this study water samples of different origins (subalpine lake, artificial lake and river) were treated by pre-oxidation, coagulation/flocculation, adsorption on granular activated carbon and disinfection. Different laboratory-scale tests were carried out to evaluate the treatment impact on ClO2 consumption in disinfection and on the formation of disinfection by-products (trihalomethanes, ...

Sep. 21, 2015

By IWA Publishing

Monochloramine and chlorine dioxide for controlling <italic>Legionella pneumophila</italic> contamination: biocide levels and disinfection by-product formation in hospital water networks

Monochloramine and chlorine dioxide for controlling Legionella pneumophila contamination: biocide levels and disinfection by-product formation in hospital water networks

Legionella colonization in hospital hot water distribution networks was evaluated following 36 months of continuous treatment with monochloramine and compared with chlorine dioxide. Nitrite, nitrate, chlorite, chlorate, bromide, trihalomethanes and haloacetic acids as well as the biocide concentration at sampled points were measured. Only 8/84 samples treated with monochloramine were found ...

Dec. 11, 2013

By IWA Publishing

Evaluation of Ecological Risks Associated with the use of Chlorine Dioxide for the Bleaching of Pulp: Scientific Progress Since 1993

1.1 Scope and Objectives A small number of viable options are presently available for the bleaching of wood pulp (delignification and brightening) during the manufacture of pulp and paper. The use of chlorine dioxide (ClO2) in the bleaching process has largely superceded the earlier use of Cl2, or elemental chlorine, in the majority of North American pulp mills: It was discovered over a decade ...

Jan. 1, 2000

By Alliance for Environmental Technology (AET)

Grundfos Alldos Chlorine Dioxide System in Malaysia’s new Sepangar Bay submarine naval base

Background At the Malaysia’s New Sepangar Bay Submarine Naval Base, Bacfree-Trident Water is selected to provide and retreat the direct potable water from municipal treated water for marine vessel applications. The source water is from the local municipal treated water supply source and is of excellent quality for most of the time. However, the water may be undesirable for direct ...

Mar. 11, 2011

From Gas to Liquid: Large-Scale Chlorination System Conversion

Abstract A number of wastewater treatment facilities using gas disinfection have decided to convert to liquid disinfection for several reasons including safety, regulatory, security, and economic factors. An optimal technology plan should be developed to facilitate the conversion. This presentation provides a case study of a large chlorine disinfection system, and demonstrates key issues of ...

Oct. 13, 2007

By Water Environment Federation (WEF)

In Situ Chemical Oxidation Remediation Pilot Study Of A Karst Bedrock Aquifer Contaminated With Chlorinated Solvents

ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The ...

Jan. 1, 2001

By Weston Solutions, Inc

Hydrogen is a colorless, odorless, non-toxic, flammable and explosive gas, and fluorine, chlorine, oxygen, carbon monoxide and air mixture were in dan

Hydrogen is a colorless, odorless, non-toxic, flammable and explosive gas, and fluorine, chlorine, oxygen, carbon monoxide and air mixture were in danger of explosion; The mixture of hydrogen and fluorine spontaneous explosion in low temperature and dark environment; When hydrogen mixed with chlorine ratio was 1:1, under light can also be the explosion.Hydrogen is colorless and tasteless, ...

May 20, 2017

By Henan Oceanus Import & Export Co., Ltd

The importance of Water Treatment in industry

Water treatment is an important industry requirement and comes under 4 main branches which include boiler water treatment, cooling water treatment, water purification and the treatment of wastewater effluent. It is considered that these cover the majority of Water treatment processes in the UK and Internationally. Water treatment is often seen as an additional cost on top of an already very ...

Aug. 2, 2011

By Feedwater Ltd

Genotoxicity and effects of nanosilver contamination in drinking water disinfection

This study was conducted to examine the genotoxicity and the influence of silver nanoparticles (AgNPs) contamination when drinking water is exposed to five different disinfection treatments: chlorine, chlorine dioxide, ozone, ozone/chlorine and ozone/chlorine dioxide. Experiments were conducted with water samples of different chemical composition, from three water supply systems in Croatia. ...

Oct. 19, 2012

By IWA Publishing

Chlorites Control in European Drinking Water Treatment Plants

ABSTRACT The paper reports initial results for experiments carried out at Fortore drinking water treatment plant aimed at controlling chlorites. Research was performed in parallel with a full-scale drinking water plant (Fortore, Italy) and a pilot plant at Mosina water treatment plant which supplies potable water to the city of Poznań (Poland). Both plants operated with pre-disinfection ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Advanced technology for water purification by heterogeneous photocatalysis

The TiO2 photocatalytic degradation of 2,4-dichlorophenol (2,4-DCP) and pentachlorophenol (PCP) was examined using a prototype photoreactor fabricated by Nulite. The degradation of both pollutants proved very efficient as in 12 min it was possible to bring the concentration of 2,4-DCP from 10 to 0.5 p.p.m. and in a separate experiment the concentration of PCP from 100 to 0.5 p.p.b. The effect of ...

Sep. 18, 2009

By Inderscience Publishers

Supreme hotel relies on supreme water disinfection by Grundfos

Kempinski Hotel Zografski is a 5-star hotel located in Lozenets, near downtown Sofia, Bulgaria. It is one of the most luxurious hotels in the capital of Bulgaria. It has 442 guest rooms, 10 conference rooms, 5 restaurants, 3 bars and the only Japanese garden in the Balkans. The hotel was built between 1974 and 1979 to the design of leading Japanese architect Kisho Kurokawa (1934 - 2007) in the ...

Mar. 11, 2011

Reference: Outstanding technology delivers outstanding potable water

Outstanding technology delivers outstanding potable water High-tech comes to the Sauerland region: To supply potable water, Stadtwerke Sundern uses state-of-the-art technology. When the time came to modernise their three waterworks, the first-class quality of ProMinent's products and systems was the deciding factor. Key figures ...

Mar. 1, 2016

By ProMinent Group - ProMinent GmbH

Crossflow Membrane Filtration High-Purity Water Systems

INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

Apr. 1, 1991

By GE Water & Process Technologies

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