휴믹질과 탁질혼합액처리에 따른 응집.침전이 막여과에 미치는 영향

초록

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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