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Journal of Chemistry
Volume 2014, Article ID 765971, 7 pages
http://dx.doi.org/10.1155/2014/765971
Research Article

The Effect of Salinity on Membrane Fouling Characteristics in an Intermittently Aerated Membrane Bioreactor

1School of Civil Engineering and Architecture, University of Jinan, Jinan, Shandong 250022, China
2State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
3Shandong Province Environmental Protection Technology Service Center, Jinan, Shandong 250102, China
4Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China

Received 24 April 2014; Revised 13 July 2014; Accepted 16 July 2014; Published 5 August 2014

Academic Editor: Chaomeng Dai

Copyright © 2014 Kang Xie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of salinity on the membrane fouling characteristics was investigated in the intermittently aerated membrane bioreactor (IAMBR). Five different salinity loadings were set from 0 to 35 g·L−1 (referring to NaCl), respectively. The removal of total organic carbon (TOC) and ammonia-nitrogen (-N) was gradually decreased with increasing salinity. The variation of membrane filtration resistance, particle size distribution (PSD), extracellular polymeric substances (EPS), soluble microbial products (SMP), and relative hydrophobicity (RH) analysis revealed that salinity has a significant effect on sludge characteristics in IAMBR. The results also indicated that the membrane fouling is often caused by the integration of sludge characteristics in saline wastewater.