| Home | E-Submission | Sitemap | Contact Us |  
top_img
J Korean Soc Environ Eng > Volume 41(10); 2019 > Article
J Korean Soc Environ Eng 2019;41(10): 541-553. doi: https://doi.org/10.4491/KSEE.2019.41.10.541
초순수용 막탈기공정 용존산소 제거효율 평가
권병수1, 백영희1, 염충균2, 석진국2, 이경혁1
1K-water연구원
2세프라텍
The Evaluation of Dissolved Oxygen Removal Efficiency for Membrane Degassing Process in Ultrapure Water
Boung-Su Kwon1, Young-Hee Baek1, Choong-Kyun Yeom2, Jin-Gook Seok2, Kyung-Hyuk Lee1
1K-water Research Institute
2SepraTek
Corresponding author  Kyung-Hyuk Lee ,Tel: 042-870-7526, Fax: 042-870-7619, Email: kh.lee@kwater.or.kr
Received: September 26, 2019;  Revised: October 8, 2019;  Accepted: October 9, 2019.  Published online: October 31, 2019.
ABSTRACT
Objectives : In this study, the efficiency of dissolved oxygen removal was evaluated in the domestic membrane degassing (MDG) process for ultrapure water production. 3M (Liqui-celTM) is mainly used for membrane degassing (MDG) process in ultrapure water. The domestic MDG process is used in CO2 gas processes in petrochemical processes. The water quality of 3M (Liqui-celTM) process managed below 1 µg/L. The efficiency of dissolved oxygen removal for the domestic MDG process was evaluated and compared with that of external films. Methods : 3M (Liqui-celTM) and domestic membrane degassing process were evaluated by ultrapure membrane degassing process. First, the DO removal rate was evaluated for the evaluation of the hollow fiber membranes, but the operating conditions such as vacuum degree and nitrogen gas injection amount were changed. Secondly, the solubility of organics in the module was evaluate. And the efficiency of dissolved oxygen removal according to four operating criteria (inlet DO concentration, vacuum level, nitrogen gas volume, and supply pressure) was evaluated.
Results
and Discussion : First, the hollow fiber membrane of 3M (Liqui-celTM) is DO 3.8~4.9 mg/L and the domestic hollow fiber membrane is 3.4~4.8 mg/L depending on the operating conditions. As a result of evaluation of the hollow fiber membrane, the removal efficiency of the domestic hollow fiber membrane was better. Secondly, As a result of the application of domestic MDG, the dissolved oxygen (DO) concentration of the product is 0 µg/L when the incoming DO concentration is 10 µg/L or less. There was no difference compared to 3M. When the operating conditions such as incoming DO concentration, vacuum level, nitrogen gas and supply pressure were changed, the DO removal rate was lowered to 61~65%.
Conclusions
: In the evaluation of the MDG hollow fiber membrane, the removal efficiency of the domestic membrane was better. However, evaluating the module lowers the efficiency. The packing efficiency of the module is low and the resistance of the membrane is increased, resulting in low removal efficiency. Improvement of domestic MDG membrane should reduce the pore size of membrane and reduce the thickness of membrane. As a result, the dissolved oxygen removal efficiency of domestic MDG membrane can be improved.
Key Words: Ultrapure Water, Membrane Contactor, Membrane Degassing, Vacuum Pressure, Nitrogen Gas
Editorial Office
464 Cheongpa-ro, #726, Jung-gu, Seoul 04510, Republic of Korea
TEL : +82-2-383-9653   FAX : +82-2-383-9654   E-mail : ksee@kosenv.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © Korean Society of Environmental Engineers. All rights reserved.                 Developed in M2Community