| Abstract |
| Humic and turbid substances in river water used for drinking can foul membrane filtration. This study explores the effect of coagulation-settler-membrane system on water treatment, specifically with synthetic water containing turbid and humic substances. The experiments involved C-S using a jar test with alum as a coagulant and a multi-layer membrane filtration process using a stirred dead-cell filter. Influent water qualities ranged from turbidity < 30 NTU to CODMn < 20 mg/L. Increasing the alum dose reduced turbidity but did not affect organic matter.Permeate flux decreased with alum dosage in a mixed water, while it did not decreased for settled water. The transmembrane pressure (TMP) build-up of the membrane gradually increased with the alum dose compared to that with no alum dose. The dual-layer microfiltration (DLMF) membrane demonstrated higher removal efficiencies for turbid and organic matter than the single-layer microfiltration (SLMF) membrane. The DLMF membrane slightly outperformed the SLMF membrane in removing turbid and organic matters. The relative permeate flux (J/Jo) and TMP build-up of SLMF membrane was approximate 20% lower than that of DLMF membrane. |
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| Key Words |
| Alum, Coagulation-settler-membrane system, Membrane configuration, Mixed and settled waters, Permeate flux, Transmembrane pressure, Turbid and humic substance, 알럼, 응집침전분리막시스템, 분리막 구성, 혼합 및 침전수, 투과속도, 막간차압, 탁질과 휴믹질 |
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