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On-line biofilm strength detection in cross-flow membrane filtration systems |
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| Authors: | Stanislaus Raditya Suwarno Wenhai Huang Y. M. John Chew Sio Hoong Henrich Tan Augustinus Elmer Trisno |
| Affiliation: | 1. Singapore Membrane Technology Centre, Nanyang Environment &2. Water Research Institute, Nanyang Technological University, Singapore;3. Advanced Environmental Biotechnology Centre, Nanyang Environment &4. Centre for Advanced Separations Engineering and Department of Chemical Engineering, University of Bath, Bath, UK;5. School of Civil &6. Environmental Engineering, Nanyang Technological University, Singapore |
| Abstract: | A fluid dynamic gauging (FDG) technique was used for on-line and in situ measurements of Pseudomonas aeruginosa PAO1 biofilm thickness and strength on flat sheet polyethersulphone membranes. The measurements are the first to be successfully conducted in a membrane cross-flow filtration system under constant permeation. In addition, FDG was used to demonstrate the removal behaviour of biofilms through local biofilm strength and removal energy estimation, which other conventional measurements such as flux and TMP cannot provide. The findings suggest that FDG can provide valuable additional information related to biofilm properties that have not been measured by other monitoring methods. |
| Keywords: | Fluid dynamic gauging (FDG) biofilm strength biofilm thickness membrane biofouling |