Publication Date:
2019
Description:
〈p〉Publication date: 1 July 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Desalination, Volume 461〈/p〉
〈p〉Author(s): H.N.P. Dayarathne, Sanghyun Jeong, Am Jang〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉One of the major problems of seawater reverse osmosis (SWRO) process is the formation of inorganic scales (calcium carbonate, CaCO〈sub〉3〈/sub〉) and calcium sulfate, CaSO〈sub〉4〈/sub〉)) on the membrane surface, which degrades the filtration performance. Antiscalants have been applied to SWRO plants to overcome the scaling problem. In this study, we used the air micro-nano bubbles (MNBs) as a chemical-free scale inhibition method to improve the overall membrane performance in the comparison with the commercially available antiscalants. During four days of continuous experiments with MNBs, the permeate fluxes declined to 86.5(0.4)% and 83.0(0.5)% with CaCO〈sub〉3〈/sub〉 and CaSO〈sub〉4〈/sub〉 containing feed solutions, respectively. These values were higher than those obtained with the use of antiscalants in the feed water (CaCO〈sub〉3〈/sub〉–63.5(0.4)% and CaSO〈sub〉4〈/sub〉–55.8(1.0)%). Membrane fouling characterization results showed that the MNBs efficiently controlled the scaling development on the membrane surface without any chemical addition.〈/p〉〈/div〉
〈/div〉
〈div xml:lang="en"〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0011916418307094-ga1.jpg" width="500" alt="Unlabelled Image" title="Unlabelled Image"〉〈/figure〉〈/p〉〈/div〉
〈/div〉
Print ISSN:
0011-9164
Electronic ISSN:
1873-4464
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Process Engineering, Biotechnology, Nutrition Technology
