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DOI : 10.17640/KSWST.2015.23.4.87 , Vol.23, No.4, 87 ~ 101, 2015
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| Title |
| Study on the Effects of Coagulation Pretreatment on the Fouling of Microfiltration Membrane Using an Online Charge Analyzing System Titrator (CAST) in Municipal Wastewater |
| 김원경 Wonkyong Kim , 성윤경 Yunkyong Sung , 유흥성 Hungsung Yoo , 박용진 Yongjin Park |
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| Abstract |
| A combined system of coagulation and membrane processes was investigated in this study for coagulation pretreatment on the fouling of microfiltration membrane in treating municipal wastewater. Coagulant dosing is traditionally based on jar-tests or operator experience, resulting in either overdosing or insufficient dosing. For reliable purity and accuracy, on-line coagulant control instrumentation is necessary. In this study, we assess the feasibility of a new coagulant dose control instrument, the online charge-based automatic titration system, charge analyzing system with titrator (CAST), to control membrane fouling in microfiltration (MF) process. This paper presents a 100 m3/d pilot for effect of coagulation pretreatment and organic matters (UV254, PO4-P) removal using a coagulation/MF process. To confirm the coagulation effect, the CAST unit was also compared with a control method where coagulants were applied at a constant rate using In-Line Mixer device. For the extension of filtration time required to reach TMP in MF process, the application of CAST unit by applying a CAST Factor can be more useful and effective for reducing CIP cycle time, and energy, water, and chemical consumption than a control unit due to the rapid and accuracy calculation of coagulant dosage. |
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| Key Words |
| Coagulation, Microfiltration(MF), Charge analyzing system with titrator (CAST), Fouling |
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