A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization. Issue 3 (15th March 2016)

• Record Type: Journal Article
• Authors: Lee, Eui-Jong; An, Alicia K. J.; Hadi, Pejman; Yan, Dickson Y. S.; Kim, Hyung-Sook
• Is Part Of: Biofouling. Volume 32:Issue 3(2016)
• Page Start: 301
• Page End: 312
• Publication Date: 2016-03-15
• Subjects: Bio-cake layer -- cleaning-in-place -- extracellular polymeric substances -- membrane bioreactor -- membrane fouling; Marine fouling organisms -- Periodicals; Materials -- Biodeterioration -- Periodicals; Fouling -- Periodicals; Biodegradation -- Periodicals; Environmental Microbiology -- Periodicals; Water Microbiology -- Periodicals; 576.165
• DOI: 10.1080/08927014.2016.1140746
• Languages: English
• ISSNs: 0892-7014

Abstract

Abstract: This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l −1 of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPSprotein ) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.