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- Title
Effect of humic acid, photo-oxidation, and adsorption at air back-flushing in hybrid water treatment of multi-channel alumina MF and photocatalyst-coated PP beads.
- Authors
Lee, Seung Jun; Park, Jin Yong; Kim, Ji-tae
- Abstract
The effect of humic acid (HA) on membrane fouling and treatment efficiency was observed in a hybrid process of seven channel alumina microfiltration (MF) and TiO2photocatalyst-coated polypropylene (PP) beads with air back-flushing for advanced water treatment, and compared with the previous study with water back-flushing. As a result, the organic matter could be one of the main factors affecting membrane fouling because the final membrane fouling resistance decreased significantly as reducing HA concentration. The turbidity treatment efficiencies were very high as 95.5–98.3% independent of HA, but that of dissolved organic matters (DOM) was the maximal 80.1% at HA 8 mg/L. However, in the result with water back-flushing, the DOM treatment efficiency was almost constant between 78.9 and 81.8% independent of HA. Treatment portions of MF, photocatalyst adsorption, and photo-oxidation were investigated by comparing the treatment efficiencies of (MF), (MF + TiO2), and (MF + TiO2 + UV) processes. The membrane fouling resistance was the minimum at (MF + TiO2 + UV) process. It means that the photo-oxidation and adsorption could control membrane fouling in the hybrid water treatment process. The role of adsorption was more important than that of photo-oxidation in the hybrid process with air back-flushing; but, the role of photo-oxidation was a little more important than that of adsorption in the result with water back-flushing for DOM treatment.
- Subjects
HUMIC acid; PHOTOOXIDATION; PHOTODEGRADATION; ALUMINUM oxide; MICROFILTRATION
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 16, p7456
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1025587