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RESEARCH ARTICLE  [Accepted]
Application of tube-type ceramic microfiltration membrane for post-treatment of effluent from biological wastewater treatment process using phase separation
Dong-Jin Son1, Woo-Yeol Kim2, Chan-Young Yun2, Dae-Gun Kim3, Duk Chang2, Young Sunwoo2, and Ki-Ho Hong4
1Department of Advanced Technology Fusion, Konkuk University, Seoul 05029, Republic of Korea
2Department of Environmental Engineering, Konkuk University, Seoul 05029, Republic of Korea
3Materials & Membranes Co., Ltd., Gwahakdanji-ro, Gangneung 210-340, Republic of Korea
4Division of Interdisciplinary Studies, Konkuk University, Seoul 05029, Republic of Korea
Corresponding Author: Ki-Ho Hong ,Tel: +82-2-450-4047, Fax: +82-2-2201-6392, Email: khhong@konkuk.ac.kr
Received: February 2, 2017;  Accepted: May 8, 2017.
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ABSTRACT
A tube-type ceramic membrane for microfiltration was developed, and the membrane module comprised of three membranes was also applied to biological carbon and nitrogen removal processes for post-treatment. Manufacturing the microfiltration membrane was successful with the structure and boundary of the coated and support layers within the membrane module clearly observable. Total kjeldahl nitrogen removal from effluent was additionally achieved through the elimination of solids containing organic nitrogen by use of the ceramic membrane module. Removal of suspended solids and colloidal substances were noticeably improved after membrane filtration, and the filtration function of the ceramic membrane could also easily be recovered by physical cleaning. By using the ceramic membrane module, the system showed average removals of organics, nitrogen, and solids up to 98%, 80% and 99.9%, respectively. Thus, this microfiltration system appears to be an alternative and flexible option for existing biological nutrient removal processes suffering from poor settling performance due to the use of a clarifier.
Keywords: Alternating flow | Ceramic membrane | Intermittent aeration | Post-treatment | Wastewater treatment
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