Analysis of Hydrophobic Membrane Fouling on the COD Loading Rates at the State of Passive Adsorption in Membrane Bioreactor

Park, Tae-Young; Choi, Changkyoo; Park, Tae-Young; Choi, Changkyoo

doi:2015.37.3.152

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 37(3); 2015 > Article

Original Paper

J Korean Soc Environ Eng 2015;37(3): 152-158. doi: https://doi.org/10.4491/KSEE.2015.37.3.152

생물학적 막분리 공정에서 수동흡착 상태에서의 유기물 유입 부하에 따른 소수성 막의 오염도 분석

박태영¹, 최창규²

¹충남대학교 환경공학과
²광주과학기술원 글로벌담수화연구센터

Analysis of Hydrophobic Membrane Fouling on the COD Loading Rates at the State of Passive Adsorption in Membrane Bioreactor

Tae-Young Park¹, Changkyoo Choi²

¹Department of Environmental Engineering, Chungnam National University
²Global Desalination Research Center, Gwangju Institute of Science and Technology

Corresponding author

Changkyoo Choi ,Tel: 062-715-2580, Fax: 062-715-2584, Email: simonchoi@gist.ac.kr

Received: November 3, 2014; Revised: March 23, 2015; Accepted: March 30, 2015. Published online: March 31, 2015.

ABSTRACT

This paper investigated the membrane fouling potential at the state of passive adsorption which is no permeation with the test modules on COD (Chemical oxygen demand) loading rates, examined the recovery rate and resistance on membrane fouling by three cleaning manners of hydrophobic membrane in a bioreactor. The results showed that high COD loading led to the increase of extra-cellular polymeric substances and filtration resistance. The permeability resistance from 1st day to 63rd day was getting increased, however, the value of permeability resistance after 63th day during the operation period was almost same level at three COD loading rates, it was due that the biomass adhesion on membrane surface at the state of passive adsorption reached to the critical state. Also, the final recovery rates after three cleaning manners were 78%, 72% and 69% at the COD loading concentrations of 250 mg/L, 500 mg/L and 750 mg/L respectively, and then recovery rate by physical cleaning at Run 2 and Run 3 was decreased after 40th day, it proved that biomass cake, which is not easily removed, was formed on the membrane surface because of high COD loading rate and EPS concentration.

Key Words: Membrane Fouling, Passive Adsorption, Extracellular Polymeric Substances, Filtration Resistance, Recovery Rate