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Evaluation of fertilizer-drawn forward osmosis for coal seam gas reverse osmosis brine treatment and sustainable agricultural reuse

Authors
Kim, YoungjinWoo, Yun ChulPhuntsho, SherubNghiem, Long D.Shon, Ho KyongHong, Seungkwan
Issue Date
1-9월-2017
Publisher
ELSEVIER SCIENCE BV
Keywords
CSG produced water; Fertilizer-drawn forward osmosis; Specific energy consumption; FDFO simulation; Membrane cleaning
Citation
JOURNAL OF MEMBRANE SCIENCE, v.537, pp.22 - 31
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MEMBRANE SCIENCE
Volume
537
Start Page
22
End Page
31
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/82280
DOI
10.1016/j.memsci.2017.05.032
ISSN
0376-7388
Abstract
The fertilizer-drawn forward osmosis (FDFO) was investigated for treating coal seam gas (CSG) produced water to generate nutrient rich solution for irrigation. Its performance was evaluated and compared with reverse osmosis (RO) in terms of specific energy consumption (SEC) and nutrient concentrations in the final product water. The RO-FDFO hybrid process was developed to further improve FDFO. The results showed that FDFO has the lowest SEC followed by the RO-FDFO and RO processes. The final nutrient concentration simulation demonstrated that the RO-FDFO hybrid process has lower final concentration, higher maximum recovery and lower nutrient loss than the stand alone FDFO process. Therefore, it was suggested that the RO-FDFO is the most effective treatment option for CSG produced water as well as favourable nutrient supply. Lastly, membrane fouling mechanism was examined in CSG RO brine treatment by FDFO, and the strategies for controlling fouling were critically evaluated. KNO3 exhibited the highest flux decline corresponding to the highest reverse salt flux, while the most severe membrane scaling was observed with calcium nitrate, primarily due to the reverse transport of calcium ions. To control membrane fouling in FDFO process, both physical flushing and chemical cleaning were examined. Membrane cleaning with citric acid of 5% resulted in a complete flux recovery.
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Hong, Seung kwan
공과대학 (건축사회환경공학부)
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