IMPACT ASSESSMENT OF THE POWER AND SIZE PARAMETERS OF ULTRAVIOLET REACTORS ON THE PERFORMANCE OF BALLAST WATER TREATMENT SYSTEMS

Abstract

Introduction. The transfer of alien organisms and pathogenic microorganisms through ballast water during ballast intake and discharge operations on ships has a negative impact on the marine environment and human health. International standards established by the International Convention for the Control and Management of Ship’s Ballast Water and Sediments regulate the maximum amount of live organisms in ballast water, creating a need for the analysis and comparison of ballast water treatment system designs. Purpose. This article describes a study on the influence of the power and size parameters of ultraviolet reactors on the performance of ballast water treatment systems. Results. In the article analyzes the energy characteristics of existing ballast water treatment systems with ultraviolet disinfection stages from companies such as Alfa Laval, Desmi Ocean Guard, Hyundai Heavy Industries, Wartsila, Trojan Marinex, Optimarin, Norwegian Greentech are presented. Based on the obtained data, an evaluation of the impact of the power and size parameters of the ultraviolet reactor on the nominal performance of ballast water treatment systems was performed, and dependencies of power, weight, and capacity of the ultraviolet reactor on the maximum ballast flow rate were obtained. Conclusions. The results of this study will simplify the process of selecting ultraviolet reactors during the design of ballast water treatment systems, enable a comparison of the efficiency of the existing ultraviolet treatment stage relative to others, and the obtained dependencies can be useful in the design and modernization of ballast water treatment systems. They will allow for a more accurate calculation of the required power and size characteristics of the ultraviolet reactor depending on the expected system performance.