| Abstract |
| The objective of this research is to investigate the effect of membrane configuration on filtration efficiency and resistance in treating a synthetic water containing turbid and humic substance. The experiments of coagulation-flocculation/sedimentation(CF/S) process using jar test with alum as coagulant and membrane configuration (single-layer microfiltration (SLMF) and dual-layer microfiltration (DLMF) membranes) using stirred dead-cell filter were carried out. Influent water qualities were in the range of turbidity <110 ntu and CODMn <40 mg/L, respectively. Based on the results, the increase of alum dosage in CF/S/SLMF system decreased considerably turbid matter, but not organic matter, while the build-up of transmembrane pressure (TMP) gradually raised with increase of alum dose compared to that of alum dosage < 2mg/L. Without CF/S process, direct filtration of SLMF membrane using high turbid water (<100ntu) resulted in a considerable decrease of permeate flux. The TMP and resistance build-up of DLMF membrane was approximate 40% lower than that of SLMF membrane, while the efficiencies of DLMF membrane in reducing turbidity and COD achieved slightly higher than that of SLMF membrane. |
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| Key Words |
| Alum, Coagulation, Membrane configuration, Permeate flux, Single- and dual-layer microfiltration membrane, Resistance Transmembrane pressur, Turbid and humic substance |
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