| Title |
Analysis of Carbon Emission from a Forward Osmosis and Reverse Osmosis Hybrid System for Water Reuse and Seawater Desalination |
| Authors |
전종민(Jeon, Jongmin) ; 김수한(Kim, Suhan) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.3.0351 |
| Keywords |
정삼투; 역삼투; 하수재이용; 해수담수화; 탄소배출량 Forward osmosis; Reverse osmosis; Water reuse; Desalination; Carbon emission |
| Abstract |
A conventional seawater reverse osmosis (SWRO) and a forward osmosis (FO) and reverse osmosis (RO) hybrid process to produce1,000 m3/d of fresh water, were designed and compared in terms of carbon emission. When FO was adapted for the osmotic dilution,the required pressure for RO decreases, and thus energy consumption decreases. The decrease in carbon emission by decreased energy consumption (up to -0.73 kgCO2/m3 using coal as the energy source) was compared with the increase in carbon emission by the FOsystem (+0.16 kgCO2/m3), which is a function of various factors such as the number of FO modules and energy consumption. The comparison revealed that the FO-RO process causes less carbon emission compared with the SWRO process when the energy sources are coal and oil. However, if energy sources with low carbon emission such as solar, wind, and nuclear energy are selected, the carbon emission of the FO-RO process becomes higher than that of the SWRO process. This implies that the type of energy source is a key factor to determine the necessity of the FO-RO process from the aspect of carbon emission. |