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DC FieldValueLanguage
dc.contributorInstitute of Textiles and Clothingen_US
dc.contributor.advisorKan, C. W. (ITC)-
dc.creatorPan, Yueling-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/8414-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleDisinfection for water system using new electrolytic systemen_US
dcterms.abstractThe land area of Hong Kong is 1104 km² and the population reaches nearly 7 million. Severe environmental problems raised up because of concentrated economic activities, population growth, and lack of pollution control. In this paper, a theoretical basis and practical evidence for the application of new electrolytic system on the water treatment are provided. These experimental results are expected to be helpful for the process design of water treatment system and reduction of the water pollution. This thesis compiles the works carried out to develop a RuO₂ electrolytic and TiO₂ photocatalytic system for water disinfection system. A RuO₂ electrolytic and TiO₂ photocatalytic integrated water disinfection system was developed to disinfect swimming pool water, fountain water and flashing water. This relatively compact system enables water disinfection without having to resort to conventional chlorine dosing, which is costly and poses potential health hazards to the public. The electrolytically generated free chlorine could achieve a stable 1-3 mg/L residual level that could effectively produce a bacterial reduction which was equivalent to more than 99 % bacterial removal as required by local legislation. These results, when translated into absolute figures for specific pathogenic bacteria, represented an extremely promising 99.9 % of Escherichia coli and a 100 % Cholera vibrio removal. Furthermore, a stable 100 % pathogenic destruction was achieved at a relatively short treatment time of 60 minutes and relatively low operational electro-potential of 30 volts. The pilot-scale system was installed, monitored and assessed on a long-term basis at Harbour Place, Hung Hom. The technology for water treatment was tested on-site rigorously in order to demonstrate its stable treatment performances, long-term reliabilities and maintenance requirements. The Ruthenium Dioxide coated electrolytic disinfection system has been very effective in treating and disinfecting water in water features in residential estates. The effectiveness and stability of electrolytic disinfection mechanism and process have been optimized. The system will also be tested and proven in treating saline water, domestic and commercial toilet flushing water to remove the pathogens.en_US
dcterms.extent161 pages : color illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2015en_US
dcterms.educationalLevelAll Doctorateen_US
dcterms.educationalLevelPh.D.en_US
dcterms.LCSHWater -- Purification.en_US
dcterms.LCSHWater -- Purification -- Disinfection.en_US
dcterms.LCSHWater quality management.en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsopen accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/8414