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http://dx.doi.org/10.5762/KAIS.2021.22.6.11

A Study of the Salt Rejection from the Surface of Marine Waste using Ultra Fine Bubble  

Kim, Bo-Min (Division of Environmental Technology, Korea Testing Laboratory)
Kim, Kwang-Koo (Division of Environmental Technology, Korea Testing Laboratory)
Park, Chan-Gyu (Division of Environmental Technology, Korea Testing Laboratory)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.6, 2021 , pp. 11-18 More about this Journal
Abstract
Nano bubble water is used in various washing processes, including cleaning of solar panels, salt rejection of roads, and cleaning precision parts of machines. High cleaning efficiency and water conservation are obtained by applying nano bubbles during pretreatment of the marine waste cleaning system. This study compared the salt rejection of nano bubble water, and it was revealed that marine waste was produced by wood immersed in 200,000 mg/L NaCl solution. Using tap water and nano bubble water for washing, comparisons of the surface salt concentrations of wood were determined according to the nozzle, orifice diameter, pump speed and washing time. Decreased surface salt concentration was observed on the wood surface with increasing washing time. Water consumption was optimal between 5- and 10-seconds washing time. Increasing orifice diameter of the nozzle reduced the spraying pressure, with consequent increase in the wood surface salt concentration, thereby establishing the importance of orifice diameter of the nozzle. Compared to levels obtained with tap water, salt concentration of the wood surface after washing with nano bubble water was 2.2% lower with sector nozzle, and 30.9% lower with circular nozzle. In the washing experiment using nano bubble water, the salt concentration on the wood surface was about 9.5 mg/L lower when washed with sector nozzle than the circular nozzle.
Keywords
Nano Bubble; Marine Waste; NaCl; Sector Nozzle; Circular Nozzle;
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