Disinfection for water system using new electrolytic system

Pao Yue-kong Library Electronic Theses Database

Disinfection for water system using new electrolytic system


Author: Pan, Yueling
Title: Disinfection for water system using new electrolytic system
Degree: Ph.D.
Year: 2015
Subject: Water -- Purification.
Water -- Purification -- Disinfection.
Water quality management.
Hong Kong Polytechnic University -- Dissertations
Department: Institute of Textiles and Clothing
Pages: 161 pages : color illustrations
Language: English
OneSearch: https://www.lib.polyu.edu.hk/bib/b2838378
URI: http://theses.lib.polyu.edu.hk/handle/200/8414
Abstract: The 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.

Files in this item

Files Size Format
b28383783.pdf 2.614Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.


Quick Search


More Information