The Role of Humic Acid, PP Beads, and pH with Water Backwashing in a Hybrid Water Treatment of Multichannel Alumina Microfiltration and PP Beads

Photooxidation oxidizes most organic compounds by mineralizing them to small inorganic molecules. In this study, the effects of dissolved organic matter (DOM), pH, and polypropylene (PP) beads concentration on membrane fouling were investigated in a hybrid water treatment process consisting of seven...

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Bibliographic Details
Published in:Membranes (Basel) 2019-12, Vol.10 (1), p.3
Main Authors: Hwang, Sungju, Lee, Yooju, Park, Jin Yong
Format: Article
Language:English
Subjects:
Acids
Adsorption
Alumina
Aluminum oxide
Backwash
Beads
Carbon fibers
Desalination
Dissolved organic matter
Efficiency
Energy consumption
Fluidizing
Fouling
Humic acids
hybrid treatment
Irradiation
Kaolin
Membrane processes
Membrane separation
Membranes
Microfiltration
Organic compounds
pH effects
Photooxidation
Pollutants
Polypropylene
polypropylene bead
Pore size
Synthetic feeds
Ultraviolet radiation
Water treatment
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Summary:Photooxidation oxidizes most organic compounds by mineralizing them to small inorganic molecules. In this study, the effects of dissolved organic matter (DOM), pH, and polypropylene (PP) beads concentration on membrane fouling were investigated in a hybrid water treatment process consisting of seven-channel alumina microfiltration (pore size 1.0 μm) and pure PP beads water backwashing with UV irradiation for photooxidation. The synthetic feed was prepared with humic acid and kaolin and flowed inside the microfiltration (MF) membrane. The permeate contacted the PP beads fluidized in the gap of the membrane and module with outside UV irradiation. Membrane fouling resistance ( ) increased dramatically with an increase in the concentration of humic acid (HA) from 6 mg/L to 8 mg/L. The treatment efficiency of DOM increased dramatically, from 14.3% to 49.7%, with an increase in the concentration of HA. The decreased with an increase of PP beads concentration. However, maximum permeate volume ( ) was acquired at 5 g/L of PP beads. The maximal treatment efficiency of DOM was 51.3% at 40 g/L of PP beads. The increased with an increase in the pH of feed, and the maximum was acquired at a pH of 5. The maximal treatment efficiency of DOM was 52.5% at pH 9.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes10010003