Assessment of Power Generation by Pressure Retarded Osmosis Process from Spiral-Wound Membrane Pilot-Plant

Go, Gil hyun; Park, Tae shin; Kang, Lim seok; Go, Gil hyun; Park, Tae shin; Kang, Lim seok

doi:2016.38.9.476

The Korean text of this paper can be translated into multiple languages on the website of http://jksee.or.kr through Google Translator.

J Korean Soc Environ Eng > Volume 38(9); 2016 > Article

Original Paper

J Korean Soc Environ Eng 2016;38(9): 476-481. doi: https://doi.org/10.4491/KSEE.2016.38.9.476

나권형 모듈을 이용한 압력지연삼투 공정의 에너지생산에 관한 연구

고길현¹, 박태신², 강임석¹

¹부경대학교 환경공학과
²GS건설

Assessment of Power Generation by Pressure Retarded Osmosis Process from Spiral-Wound Membrane Pilot-Plant

Gil hyun Go¹, Tae shin Park², Lim seok Kang¹

¹Department of Environmental Engineering, Pukyong National University
²GS E&C

Corresponding author

Lim seok Kang ,Tel: 051-629-6527, Fax: 051-629-6523, Email: kangls@pknu.ac.kr

Received: January 18, 2016; Revised: February 4, 2016; Accepted: August 15, 2016. Published online: September 30, 2016.

ABSTRACT

Pressure retarded osmosis (PRO) is a quite new technique for power generation using an osmotically driven membrane process. In the PRO process, water permeates through a semipermeable membrane from a low concentration feed solution to a high concentration draw solution due to osmotic pressure. This study carried out to evaluate the performance of the 8 in spiral wound membrane module using reverse osmosis concentrate for a draw solution and reverse osmosis permeate for a feed solution. Three different flowrates of draw and feed solution, such as 2.4 L/min, 5.0 L/min, and 10.0 L/min were used to estimate the power density and water flux under various range of hydraulic pressure differences between 5 bar and 30 bar. In addition, the effects of feed and draw solution concentration, flowrate, and mixing ratio on 8 in spiral wound PRO membrane module performance were investigated in this study. As major results, increases of the draw solution concentration lead to the improvement of power denstiy, and water flux. Also, increase of flowrate resulted in the improvement of power density and water flux. In addition, optimal mixing ratio of draw and feed solution inlet flowrate was found to be 1:1 to attain a maximum power denstiy.

Key Words: Pressure Retarded Osmosis, Water Flux, Power Density, Spiral Wound Module