Seminars

Resource Recovery in Seawater Desalination using the Membrane

Dr. Sanghyun JEONG

Research Professor, Graduate School of Water Resources
SungKyunKwan University (SKKU)

Dr. Sanghyun JEONG

Date: 7 May 2018 (Monday)
Time: 11:00 a.m. – 12:00 p.m.
Venue: B5-310, 5/F, Yeung Kin Man Academic Building, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong
Organizer:

School of Energy and Environment
City University of Hong Kong

Abstract

The ultimate goal of seawater reverse osmosis (SWRO) brine management is to achieve minimal liquid discharge while recovering valuable resources. The suitability of an integrated system of membrane distillation (MD) with sorption for the recovery of rubidium (Rb⁺) and simultaneous SWRO brine volume reduction has been firstly evaluated. Polymer encapsulated potassium copper hexacyanoferrate (KCuFC(PAN)) sorbent exhibited a good selectivity for Rb⁺ sorption. The integrated MD-KCuFC(PAN) system with periodic membrane cleaning, enabled 65% water recovery. A stable MD permeate flux was achieved with good quality permeate. KCuFC(PAN) showed a high regeneration and reuse capacity. Ammonium chloride air stripping followed by resorcinol formaldehyde resin filtration enabled to recover Rb⁺ from the desorbed solution.

MD with crystallization (MDC) is another attractive process for high saline SWRO brine treatment. MDC also produces additional fresh water while simultaneously recovering valuable resources. It has been developed a novel approach of fractional-submerged MDC (F-SMDC), in which MD and crystallizer are integrated in a feed tank with a submerged membrane. F-SMDC principle is based on the presence of temperature/concentration gradient (TG/CG) in the feed reactor. The operational conditions at the top portion of the feed reactor (higher temperature and lower feed concentration) was well suited for MD operation, while the bottom portion of the reactor (lower temperature and higher concentration) was favorable for crystal growth.

About the Speaker

Dr. Sanghyun Jeong (PhD in Environmental Engineering, University of Technology Sydney, Australia) is a research professor at Graduate School of Water Resources (GSWR), Sungkyunkwan University (SKKU). He has recently been appointed as a Korean President’s Postdoctoral Fellow. He has been involved in a number of projects on desalination, brine treatment, wastewater treatment, as well as water reuse as a principal researcher and a chief investigator over the last 12 years and published more than 70 peer-reviewed research papers in top journals. His main research interests include brine characterization and treatment using the membrane distillation process, reduction and analysis of organic and biological fouling, membrane-based filtration processes and environmental biotechnology for desalination and water reuse.

Enquiry: see.enquiry@cityu.edu.hk  (email), 3442 2412 (Tel.)

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