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Cho, Kyung Hwa
Water-Environmental Informatics Lab (WEIL)
Research Interests
  • Water Quality Monitoring and Modeling, Water Treatment Process Modeling

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Optimization of operating variables in a pilot-scale reverse osmosis membrane process for reclamation of tunnel construction wastewater

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Title
Optimization of operating variables in a pilot-scale reverse osmosis membrane process for reclamation of tunnel construction wastewater
Author
Cho, Hyun UkCho, Kyung HwaKang, SeokkooKim, Young Mo
Issue Date
2016-06
Publisher
DESALINATION PUBL
Citation
DESALINATION AND WATER TREATMENT, v.57, no.26, pp.12082 - 12089
Abstract
The goal of this study was to investigate the individual and combined effects of temperature, salinity, and pressure on permeate flux and salt rejection of the reverse osmosis (RO) process used for reclamation of tunnel construction wastewater. Regardless of changes in temperature, higher operating pressures enhanced both permeate flux and salt rejection, while effects of temperatures on performance varied depending on the operating pressures. Increasing temperatures to less than 35 bar did not improve the permeate flux and salt rejection, while to more than 50 bar led to higher rejection as well as more permeate flux of reclaimed wastewater. Based on analysis of model equations developed, the extent of flux and salt rejection required for reuse of the reclaimed wastewater occurred under different optimal conditions depending on variations in seasons and salinity of wastewater. In particular, it was necessary to add additional pressure exceeding 50 bar or increase the temperature to over 20°C when wastewater of more than 20‰ salinity flows into the treatment system. Adjustment of influential variables can provide an implementable approach to improve operation of the RO process as well as optimize a process for practical construction on-site applications. © 2015 Balaban Desalination Publications. All rights reserved
URI
https://scholarworks.unist.ac.kr/handle/201301/17605
URL
http://www.tandfonline.com/doi/full/10.1080/19443994.2015.1049406#.VjBOv9LhBpg
DOI
10.1080/19443994.2015.1049406
ISSN
1944-3994
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