TY - JOUR
T1 - Distribution and deposition of organic fouling on the microfiltration membrane evaluated by high-frequency ultrasound
AU - Lin, Yi Hsun
AU - Tung, Kuo Lun
AU - Wang, Shyh Hau
AU - Zhou, Qifa
AU - Shung, K. Kirk
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan , with grant numbers: NSC 98-2221-E-006-263-MY3 and NSC 101-2221-E-006-065-MY2 . Special thanks to Mr. Hso-Chuan Pai for the preparation and assistance of experimental arrangement.
PY - 2013/4/5
Y1 - 2013/4/5
N2 - A 50MHz high-frequency ultrasound and analysis method were developed to further improve the in situ assessment of deposition and distribution of organic fouling on the polyvinylidene fluoride (PVDF) membranes. Measurements of fouling depositions were performed from PVDF membranes filtrated with aqueous humic acid solutions (HAS) of 2 and 4ppm concentrations in a flat-sheet module. Ultrasound signals reflected from the PVDF membranes, following filtrations at various durations including 0, 5, 15, 30, 60, and 100min, were acquired. The thickness and distribution of fouling estimated and assessed by peak-to-peak echo voltage (Vpp) and C-mode images were found to be non-homogeneously deposited on the membranes. Following the filtrations with 2 and 4ppm HAS for 100min, the corresponding thickness of fouling deposition increased from 1.81±0.9 to 2.45±1.57μm, respectively; those average Vpp decreased from 2.05±0.07 to 1.13±0.16V and from 2.11±0.08 to 0.94±0.15V. These results demonstrated that the deposition and distribution of organic fouling could be sensitively and rapidly evaluated by high-frequency ultrasound image incorporated with the analysis method.
AB - A 50MHz high-frequency ultrasound and analysis method were developed to further improve the in situ assessment of deposition and distribution of organic fouling on the polyvinylidene fluoride (PVDF) membranes. Measurements of fouling depositions were performed from PVDF membranes filtrated with aqueous humic acid solutions (HAS) of 2 and 4ppm concentrations in a flat-sheet module. Ultrasound signals reflected from the PVDF membranes, following filtrations at various durations including 0, 5, 15, 30, 60, and 100min, were acquired. The thickness and distribution of fouling estimated and assessed by peak-to-peak echo voltage (Vpp) and C-mode images were found to be non-homogeneously deposited on the membranes. Following the filtrations with 2 and 4ppm HAS for 100min, the corresponding thickness of fouling deposition increased from 1.81±0.9 to 2.45±1.57μm, respectively; those average Vpp decreased from 2.05±0.07 to 1.13±0.16V and from 2.11±0.08 to 0.94±0.15V. These results demonstrated that the deposition and distribution of organic fouling could be sensitively and rapidly evaluated by high-frequency ultrasound image incorporated with the analysis method.
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U2 - 10.1016/j.memsci.2013.01.020
DO - 10.1016/j.memsci.2013.01.020
M3 - Article
AN - SCOPUS:84874411264
SN - 0376-7388
VL - 433
SP - 100
EP - 111
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -