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Cho, Jaeweon
OWIELAB(Organic-Water Interface Engineering Laboratory)
Research Interests
  • Convergence of Science and Arts, Feces Standard Money (FSM), Water & Energy

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Effect of algae on fouling and efficiency of UF membranes

Cited 43 times inthomson ciCited 49 times inthomson ci
Title
Effect of algae on fouling and efficiency of UF membranes
Author
Kwon, BoksoonPark, NoeonCho, Jaeweon
Keywords
Algae; Convection-diffusion (CD) model; Convection-diffusion-electrophoretic migration (CDE); Microcystis; Secondary membrane; UF membrane
Issue Date
2005-07
Publisher
ELSEVIER SCIENCE BV
Citation
DESALINATION, v.179, no.1-3, pp.203 - 214
Abstract
For UF/MF and NF membrane process for the drinking water treatment, algae have been known to directly or indirectly affect membrane filtration. During algae bloom, transmembrane pressure seriously increases or flux significantly decreases. Algae can also produce taste and odor causing compounds such as 2-methyl isoborneol (2-MIB) and geosmin as well as toxic materials. In this study, microcystis aeruginosa was evaluated as a representative algae with an UF membrane in terms of fouling mechanisms by algae. The size and surface charge of microcystis were 2.8 gm and -12.35 mV, respectively, as measured by electrophoresis light scattering method. 10 pm silica was used to serve as a secondary membrane which was expected to remove smaller particles (i.e., here microcystis) before they reach the membrane surface. However, silica did not effectively act as the secondary membrane for microcystis contrarily to expectation. Combination of microcystis and natural organic matter (NOM) provided higher flux decline than either of microcystis and NOM filtration with the UF (EW) membrane. Concentration polarization (CP) thickness of microcystis on the EW membrane was calculated by both convection-diffusionelectrophoretic migration (CDE) and convection-diffusion (CD) models with consideration of the negative charge of membrane and algae. The CP thickness estimated by the CDE model was higher than that by the CD model. And, microcystis fouled on the membrane surface could be more effectively cleaned by 100 ppm NaOCl solution than 0.025 N NaOH solution
URI
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DOI
10.1016/j.desal.2004.11.068
ISSN
0011-9164
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