ozone treatment Articles
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“Ozone” and “GAC filtration” synergy for removal of emerging micropollutants in a drinking water treatment plant?
Ozonation plays an essential role in water disinfection to inactivate viruses, bacteria and some parasites (Giardia). Ozone treatment rates to attain disinfection goals also result in oxidation reactions of emerging pollutants. Pharmaceuticals–except Ciprofloxacin–are very reactive to ozone: they are removed as early as the transfer compartment outlet even at an ozone treatment rate ...
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Treatment of waste thermal waters by ozonation and nanofiltraton
After their use for heating, e.g. in greenhouses, waste thermal waters may cause environmental problems due to their high contents of ions, and in some cases organic matter (associated with an oxygen demand) or toxic compounds. The aims of this work were to decrease the high organic content of waste thermal water by a combination of ozone treatment and membrane separation, and to investigate ...
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Degradation of chlorpyriphos in water by advanced oxidation processes
The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was ...
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Decolorization of azo dye C.I. Reactive Black 5 by ozonation in aqueous solution: influencing factors, degradation products, reaction pathway and toxicity assessment
In this study, ozonation treatment of C.I. Reactive Black 5 (RB5) was investigated at various operating parameters. The results showed that the aqueous solution initially containing 200 mg/L RB5 was quickly decolorized at pH 8.0 with an ozone dose of 3.2 g/h. Reaction intermediates with m/z 281, 546, 201, 350, 286 and 222 were elucidated using liquid chromatography-mass spectrometry, while ...
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Ozone treatment for cooling towers
Abstract The use of ozone as a maintenance treatment for cooling towers has good potential for operation and maintenance savings in the Federal secior. A small amount of ozone acts as a powerful biocide thai decreases or nearly eliminates the need to remove quantities of water from the cooling tower in order to decrease the concentration of organic and mineral solids in the system. Ozone ...
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Combination of microwave demulsification, ozone oxidation and biological aerated filter for advanced treatment of oilfield wastewater with low biodegradability
In this study, a combination process was developed in laboratory-scale including microwave demulsification, ozonation, and biological aerated filter (BAF) in series for the purpose of removing pollutants in oilfield wastewater with high microtoxicity. The microwave demulsification treatment removed 63.4% of oil. The ozonation treatment removed 79.3% of petroleum sulfonate, resulting in a ...
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Vehicle assembly building, Kennedy space center
Situation: In January of 2000, Zentox Corporation replaced the existing ozone treatment system on the Vehicle Assembly Building (VAB) and Launch Control Center (LCC) cooling towers with a state-of-the-art ozone water treatment system that is centered on the Clean Streams™ Ozone Transfer Process. The cooling towers, a launch critical system located adjacent to the VAB, had been on ozone ...
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Control of Microthrix parvicella and sludge bulking by ozone in a full-scale WWTP
Bulking and rising sludge are common problems in wastewater treatment plants (WWTPs) and are primarily caused by increased growth of filamentous bacteria such as Microthrix parvicella. It has a negative impact on sludge settling properties in activated sludge (AS) process, in addition to being responsible for foam formation. Different methods can be used to control sludge bulking. The aim of ...
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Biological activity of bleached kraft pulp mill effluents before and after activated sludge and ozone treatments
Eucalyptus bleached kraft pulp production, an important sector of the Brazilian national economy, is responsible for generating large volume, high pollutant load effluents, containing a considerable fraction of recalcitrant organic matter. The objectives of this study were to quantify the biological activity of the effluent from a eucalyptus bleached kraft pulp mill, characterize the nature of ...
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Ozone dosage calculation for water treatment
Water treatment is a critical process that safeguards the safety and quality of our water supply. One of the most effective methods for water treatment is ozone treatment, known for its remarkable ability to disinfect and purify water efficiently. However, harnessing the full potential of ozone in water treatment requires precise ...
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Application of an environmentally optimum cooling water system design in water and energy conservation
Recirculating cooling water systems are consist of a cooling tower and heat-exchanger network which conventionally have a parallel configuration. However, reuse of water between different cooling duties enables cooling water networks to be designed with series arrangements. This will results in performance improvement and increased cooling tower capacity. Research on recirculating cooling water ...
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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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Ozone water treatment FAQs
1. What is ozone water treatment, and how does it work? Ozone water treatment purifies and disinfects water using ozone gas (O3) generated on-site using specialized ozone generators. Ozone consists of three oxygen atoms and acts as a powerful oxidizing agent. When Ozone is injected into the water, it reacts with contaminants through chemical oxidation. This reaction effectively neutralizes ...
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Ethylene removal vs Ozone treatment
Discussion based on published article by UC Davis: Ozone Applications for Post-harvest Disinfection of Edible Horticultural Crops. Trevor V Suslow. Extension of Vegetable Crops, University of California, Davis The ozone treatment is not very effective in ethylene removal at the allowed ozone concentrations and under the current application mode (without forced air). "Injection of gaseous ...
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Oxidized fulvic acid adsorption on activated carbon
This study evaluates and compares the parameters of equilibrium adsorption from aqueous solutions of river fulvic acids (FA) and peat fulvic acids. Compared to peat FA, the river FA had lower biodegradable dissolved organic carbon (BDOC). We observed a tendency for correlation between change of Gibbs free energy of adsorption and BDOC value. A chlorination dose of 1.4 mg L−1 did not ...
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Is your ozone generator up to the job?
After over a decade of building and supplying many ozone generators for water treatment all over the world, I had noticed that we hardly sell anything locally. It seemed strange to me, so I decided to call several different local water treatment professionals to find out what was the reason behind this. I asked them if they had ever used an ozone generator for water treatment. To my surprise, ...
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Introduction to Ozone for Water Treatment
An ozone water treatment system reduces contaminants using the oxidative power of ozone. Ozone is created in ozone generators and is used to treat water. The ozone is then injected into the water and immediately eliminates contaminants, such as bacteria, viruses, and metals. This article is an introduction to ozone water treatment. ...
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Effect of ozone on secondary effluent treatment for reuse in agriculture
The results of secondary effluents ozonation from domestic sewages treatment plants in Havana, Cuba are presented. The ozone effect on some physico-chemical parameters was determined. The ozone gas concentration is the parameter, which exerts the greatest influence on the ozone transferred. The results indicated that ozonation of secondary effluents is a safe disinfection alternative for ...
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Ozone for cooling tower systems – an update and lessons learned at the kennedy space center
KEYWORDS: Ozone, Cooling Water, Stand-Alone Treatment, and Large Capacity Cooling Tower SUMMARY: The operational experience and performance of the successful use of ozone as a stand-alone cooling water treatment method are discussed. Several guidelines for design parameters and operational controls are presented. From a wide field of application experience, the author offers several ...
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Use of ozone in the treatment of cyanide containing effluents
The treatment of effluents of the gold and silver cyanidation process is one of the main problems that the precious metals industry faces. These effluents contain variable quantities of free cyanide, weak complexed cyanide, strong complexed cyanide and thiocyanate. Different methods are used for the removal of cyanide but most of the times the consumption of reagents raises the operation cost to ...
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