chlorine dioxide disinfection Articles
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Change in genotoxicity of wastewater during chlorine dioxide and chlorine disinfections and the influence of ammonia nitrogen
The effects of chlorine dioxide and chlorine disinfections on the genotoxicity of different biologically treated sewage wastewater samples were studied by umu-test. The experiment results showed that when chlorine dioxide dosage was increased from 0 to 30 mg/L, the genotoxicity of wastewater first decreased rapidly and then tended to be stable, while when the chlorine dosage was increased from 0 ...
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Chlorine dioxide disinfectant benefits
What is chlorine dioxide? Chlorine dioxide (ClO2) is a highly effective, eco-friendly micro biocide that carries the US EPA, FDA and UK Government approvals for many of its uses. It is a selective oxidant that eliminates many pathogenic organisms including Legionella, Listeria, Salmonella, amoeba cysts, Giardia cysts, E. Coli, and Cryptosporidium. Importantly, CIO2 also destroys biofilms so ...
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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 ...
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Zetor - Protecting hot water from bacteria - Case Study
Bacteriological contamination was detected in the Zetor company during a regular analysis of warm non-potable water, used for sanitary facilities. How we solved the bacteria The sanitary facilities in Zetor use three junction exchange stations, each with a volume of 32 m3. As the first step, we conducted a brief study into sanitation of hot water mains and explored the possibilities of ...
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Human infective potential of Cryptosporidium spp., Giardia duodenalis and Enterocytozoon bieneusi in urban wastewater treatment plant effluents
Cryptosporidiosis, giardiasis, and microsporidiosis are important waterborne diseases. In the standard for wastewater treatment plant (WWTP) effluents in China and other countries, the fecal coliform count is the only microbial indicator, raising concerns about the potential for pathogen transmission through WWTP effluent reuse. In this study, we collected 50 effluent samples (30 L/sample) ...
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Hospital Wastewater Treatment Process
1. The characteristics of hospital sewage Hospital waste water contains some special pollutants, such as drugs, disinfectants, diagnostic agents, detergents, and a large number of pathogenic microorganisms, parasite eggs and various viruses (such as roundworm eggs, hepatitis virus, tuberculosis and dysentery) . In addition, there are radioactive substances such as radium 226, phosphorus, gold ...
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Water treatment at a greenhouse - Ethiopia, 1.000 m3/d - Case Study
Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly for a brackish water reverse osmosis system, including chlorine dioxide and UV disinfection for a grower in the Democratic Republic of Ethiopia. The treated water is used as process water for the horticultural applications on the farm. The water treatment system is equipped with top brand ...
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Students tackle disinfection issues using drinking water treatment simulator
In a recent innovative assignment, Civil Engineering students at the University of Toronto pooled their talents to address a growing drinking water issue. Teams of students in the graduate course taught by Dr. Robert Andrews used computer simulation to determine how best to optimize a water treatment plant to meet tough new standards for disinfectant residual and disinfectant by-product (DBP) ...
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Persistent Drought Challenges Fracking
Feature Article CleantechIQ.com - Executive Commentary Freshwater has historically been the base fluid essential for fracking, sweeping, and oil sands recovery because it has been abundant and readily available, and because of its low cost. Unfortunately, all of that is now changing due to a longer than expected global drought, and the industry is examining new options and technologies to find ...
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Survival of pathogens in drinking water plumbing systems: impact factors and sanitation options
The objective was to determine impact factors that would allow Pseudomonas aeruginosa and Legionella pneumophila to survive sanitation measures of household drinking water systems. Therefore, different disinfectant concentrations were tested under different operating conditions in close-to-practice experiments. Particular attention was paid to the viable but non-culturable (VBNC) state of the ...
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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, ...
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Using RuO2 anode for chlorine dioxide production in an un-divided electrochemical cell
Chlorine dioxide is a well known powerful disinfectant. Although there are several chemical and electrochemical methods developed for on-line chlorine dioxide generation, the details are mostly confined as patents. We studied in this work the electrochemical generation of dissolved chlorine dioxide from an un-buffered solution of sodium chlorite and sodium chloride mixture in an un-divided ...
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MYTH vs TRUTH: “If my disinfectant residual is always high enough, I don’t have to worry about microbes”
Monitoring disinfectant residuals (i.e. Free and Total Chlorine and/or Chloramine concentration) is one of the most essential practices in drinking water management programs. This ensures that sufficient protection is maintained at all points in the distribution system. The absence of a disinfectant residual means that suppression of microbiological growth is much more difficult and the rate of ...
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Leaching of bisphenol A and F from new and old epoxy coatings: laboratory and field studies
Laboratory tests were carried out with three types of new epoxy resins to assess the release of bisphenol A and F (BPA and BPF) and potential halogenated phenolic by-products. Tests were carried out over a duration of 6 months in the presence and absence of disinfectants (chlorine and chlorine dioxide) at realistic doses and contact times. None of the three systems exhibited Fickian-type ...
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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. ...
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Use of a Magnetic Ion Exchange Resin to Improve DBP Precursor Removal and Reduce Coagulant Usage at Lee County`s OLGA WTP
The 5 MGD Olga WTP in Lee County, Ft Myers, treats water from the Caloosahatchee River where TOC and color levels range from 15-25mg/L and 80-350 Pt Co Units respectively. This surface water presents many treatment challenges and treatment costs are high with alum doses in excess of 200mg/L required during times of the year to provide an adequate treated water quality. As part of Lee County’s ...
By Ixom
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How to care for your water tank
Caring for your water tank not only makes it last longer, it keeps the water safe for you and your family. Follow our care tips and you will always be able to rely on your tank. Inspect the tank every 3 months Inspecting your tank helps you identify leaks and damage. Repairing these early goes a long way to keeping your water tank safe. Other things you should look for include: Guttering ...
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Efficacy of chlorine, chlorine dioxide and ultraviolet radiation as disinfectants against plant pathogens in irrigation water
Abstract A number of disinfection treatments are available to treat irrigation water to reduce the risk of plant disease. However, limited published studies had compared the efficacy of disinfection treatments on a range of plant pathogen species, on their various life stages and in different water qualities. In this study, propagules (spores, mycelium, cells) of eight plant pathogens including ...
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What methods of disinfecting water are there?
The aim behind disinfecting water is to make it safe to drink. As the water experts, NW Solutions will look at some of the different methods to disinfect water and their advantages and disadvantages. To be considered for this list, the disinfectant must: Destroy all types of pathogens, regardless of volume, present in the water Not make the water toxic or render it unpalatable Function ...
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Characteristics and Classification of Buried Domestic Sewage Treatment Technology
The buried sewage treatment equipment is a modular high-efficiency biological sewage treatment equipment. It is a sewage biological treatment system with biofilm as the main body of purification. It makes full use of biofilm reactors such as anaerobic biofilter and contact oxidation bed. The characteristics of high biological density, strong pollution resistance, low power consumption, stable ...
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