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http://dx.doi.org/10.7837/kosomes.2020.26.6.681

Analysis of Performance Requirements of Mechanical System for Recovery of Deposited Hazardous and Noxious Substances from Seabed around Seaport  

Hwang, Ho-Jin (Korea Research Institute of Ships and Ocean Engineering)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.26, no.6, 2020 , pp. 681-688 More about this Journal
Abstract
Approximately 6,000 chemicals are transported through the sea, including hazardous and noxious substances (HNS), which cause marine pollution and are harmful to marine life. The HNS discharged into the sea during the maritime transportation process undergoes physical and chemical changes on the sea surface and in seawater, and some types of HNS sink and are deposited on the seabed. The HNS deposited on the seabed adversely affects the benthic ecosystem, and hence, it is desirable to detect, treat, and recover the HNS on the seabed. Therefore, this study was conducted to analyze the performance requirements that should be considered as the top priority when developing a mechanical system for recovering the HNS deposited on the seabed. Various types of existing dredging devices used for collecting and recovering pollutants from river beds and seabeds were investigated, and 10 performance indices for the mechanical devices were selected. The new performance requirements for the development of the seabed-deposited HNS recovery system were proposed using performance indices. By considering the depth of water in domestic seaports, some of the performance requirements of the mechanical system for recovering deposited HNS from the seabed were obtained as follows: production rate (50-300 ㎥/hr), maximum operation depth (50 m), sediment type (most forms), percentage of solids (10 % or higher), horizontal operating accuracy (±10 cm), limiting currents (3-5 knots). These performance requirements are expected to be useful in the conceptual and basic design of mechanical systems for recovering seabed-deposited HNS.
Keywords
Hazardous and noxious substances; Mechanical recovery system; Performance indices; Performance requirements; Deposited HNS;
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Times Cited By KSCI : 11  (Citation Analysis)
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