| Summary: | 碩士 === 國立成功大學 === 環境工程學系 === 107 === Industrial wastewater reclamation is an important strategy for reducing freshwater consumption and improving water reuse. However, reuse of treated wastewater has caused serious operation problems. It was found that secondary and tertiary effluent contained high concentration of effluent organic matter (EfOM), leading to membrane fouling issue. To evaluate the properties of EfOM in different effluents, including water treated with advanced oxidation processes (AOP), biological processes (BioNET) and ultrafiltration (UF), flourescence excitation and emission spectroscopy (FEEMs) and high pressure size exclusion chromatography (HPSEC) were employed for the analysis. Water samples were taken from two wastewater treatment plants (WWTPs), Linyuan and Nanzi WWTPs, and analyzed with the two methods. Linyuan samples were found to have higher humics and more hydrophibic than those for Nanzi samples. For Nanzi samples, they were found to be dominated by aromatic protein II fraction coming from biological activity. The AOP treatment using ozone and ozone/hydrogen peroxide in this study was effective to remove large molecule EfOM (LM-EfOM) when applied in Nanzi sample with small dosage. However, it was not effective for Linyuan samples. The BioNET treatment in this study was effective to remove LM-EfOM only for Nanzi sample. Flux declination is decreased when applied ozone and decreased following with oxidant dosage in UF system. Moreover, biopolymer is the highest fraction to be removed by UF, which is the main cause for flux reduction.
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