Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.marpolbul.2012.01.018
Title: A low-energy intensive electrochemical system for the eradication of Escherichia coli from ballast water: Process development, disinfection chemistry, and kinetics modeling
Authors: Nadeeshani Nanayakkara, K.G. 
Khorshed Alam, A.K.M.
Zheng, Y.-M. 
Paul Chen, J. 
Keywords: Ballast water
E. coli
Electrochemical disinfection
Kinetics modeling
Issue Date: Jun-2012
Citation: Nadeeshani Nanayakkara, K.G., Khorshed Alam, A.K.M., Zheng, Y.-M., Paul Chen, J. (2012-06). A low-energy intensive electrochemical system for the eradication of Escherichia coli from ballast water: Process development, disinfection chemistry, and kinetics modeling. Marine Pollution Bulletin 64 (6) : 1238-1245. ScholarBank@NUS Repository. https://doi.org/10.1016/j.marpolbul.2012.01.018
Abstract: The invasion of biological organisms via ballast water has created threats to the environment and human health. In this study, a cost-effective electrochemical disinfection reactor was developed to inactivate Escherichia coli, one of the IMO-regulated indicator microbes, in simulated ballast water. The complete inactivation of E. coli could be achieved within a very short time (150, 120, or 60s) with an energy consumption as low as 0.0090, 0.0074 or 0.0035kWh/m 3 for ballast water containing E. coli at concentrations of 10 8, 10 7 and 10 6CFU/100mL, respectively. Electrochemical chlorination was the major disinfection mechanism in chloride-abundant electrolytes, whereas oxidants such as ozone and free radicals contributed to 20% of the disinfection efficiency in chloride-free electrolytes. Moreover, a disinfection kinetics model was successfully developed to describe the inactivation of E. coli. © 2012 Elsevier Ltd.
Source Title: Marine Pollution Bulletin
URI: http://scholarbank.nus.edu.sg/handle/10635/87446
ISSN: 0025326X
DOI: 10.1016/j.marpolbul.2012.01.018
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