Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Design for seawater reverse osmosis plant using water blending in smart water grid

스마트 워터 그리드 내에서 워터 블렌딩을 고려한 역삼투 해수담수화 플랜트 설계

  • Lee, Hongju (Department of civil engineering, Pukyong National University) ;
  • Park, Hanbai (Korea Interfacial Science Engineering Institute) ;
  • Woo, Dal-Sik (Korea Interfacial Science Engineering Institute) ;
  • Kim, Suhan (Department of civil engineering, Pukyong National University)
  • Received : 2014.01.18
  • Accepted : 2015.02.10
  • Published : 2015.02.15
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Abstract

Smart water grid is a water network with communication to save water and energy using various water resources. In smart water grid, water product from the various sources can be blended to be supplied to end-users. The product water blending was reported by literatures while feed water blending has been rarely reported so far. In this work, a commercial reverse osmosis (RO) system design software provided by a membrane manufacturer was used to elucidate the effect of feed water blending on the performance of seawater reverse osmosis (SWRO) plant. Fresh water from exisiting water resource was assumed to be blended to seawater to decrease salt concentration of the RO feed water. The feed water blending can simplify the RO system from double to single pass and decrease seawater intake amount, the unit prices of the RO system components including high pressure pump, and operation risk. Due to the increase in RO plant capacity with the feed water blending, however, the RO membrane area and total power consumption increase at higher water blending rates. Therefore, a specific benefit-cost analysis should be carried out to apply the feed water blending to SWRO plants.

Keywords

References

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