Prototype of Ozone Generator for Industrial Wastewater Treatment: Some Kinetics and Performance Aspects (original) (raw)
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International Journal of Environmental Studies, 2018
Volume dielectric barrier discharge (VDBD) is considered to be the most effective method for ozone generation. This paper reports a comparison between a simple 'classic' VDBD cylindrical ozone generator and a 'metallic-mesh-filled-air-gap cylindrical dielectric barrier discharge' model. The obtained results show that although the majority of ozone generators are of the volume discharge type, the novel volume discharge model has provided better results in terms of ozone generation and energy efficiency. A skid was built by using eight proposed generators and was successfully used for wastewater treatment.
Applications of ozone for modern wastewater treatment
International Journal of Environmental Engineering, 2012
Modern Wastewater Treatment Plants (WWTPs) effi ciently eliminate organic pollution down to Biological Oxygen Demand (BOD) and Suspended Solids (SS) values of less than 30 mg/l. However, these treated effl uents still contain biologically Persistent Organic Matter (POM), characterised by a Chemical Oxygen Demand (COD) of between 50 and more than 100 mg/l. Industrial WWTP effl uents have COD concentrations of several hundred mg/l. Under certain conditions of discharge imposed to the effl uent, POM abatement is necessary. Elimination of pathogenic microorganisms , i.e., disinfection and inhibition of acute toxicity, is also required. Another class of toxic compounds, Micro-Pollutants (MPs), present in WWTP effl uents in much lower concentrations, μg/l even ng/l, has become a serious matter of concern. Ozonation, as a complementary stage in the treatment sequence of a WWTP, alone or in combination with biofi ltration, has been demonstrated by multiple laboratory-pilot tests and existing operating plants to be an effi cient and economically sound technology for the abatement of and POM and MPs and for disinfection. The purpose of this essay is to present ozone with its state-of-the-art features, from a qualitative as well as a quantitative aspect, with examples of modern applications for improved wastewater treatment.
Construction of a low budget ozone generator prototype
IOSR Journal of Electrical and Electronics Engineering, 2017
Industries advance causes serious damages to environment, these impacts are mainly visibly due to pollution emitted as gases and effluents. However, most companies are looking for alternatives that are both fast and efficient in reducing environmental degradation. Regarding effluents emission, there are recent researches that seek methods to treat wastewater effectively in industrial processes and, among these methods, ozone use stands out. This paper presents the development of a low cost sustainable ozone generator prototype with the purpose of producing gas by using corona effect, formed by high voltage generators using photovoltaic panels as power supply. In its construction recycled materials were used. The project aimed to use electronic concepts as a way to increase the apparatus efficiency, looking forwards to improve the gas application in liquid effluents treatment. After the prototype construction, ozone production was certificated by bubbling out the reactor directly into a solution of soluble iodine / potassium iodide. Ozone presence was observed by the solution coloration changing from colorless to intense dark blue. At the end of the work, experiments were carried out at the treatment of water from fish farms, in which the gas performance in the regulation of quality indicators, such as salinity, pH, dissolved oxygen and Electrical conductivity.
Applications of ozone for industrial wastewater treatment—a review
Ozone: science & engineering, 1996
In 1980 the application of ozone to trihalomethane control was developed and a shift to papers on drinking water treatment occurred. Early papers also introduced the use of ozone for pulp bleaching, odor control, bottled water treatment, swimming pool treatment, cooling tower treatment, the use of UV, advanced oxidation, and ozone measurement. As the journal and ozone science matured, papers began to cover more in-depth studies on disinfection removal of specific pollutants and to focus on current environmental problems such as inactivation of Cryptosporidium. Current issues are covering new applications for ozone such as agri-food applications and emerging contaminants (endocrine disruptors).