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DOI : 10.17640/KSWST.2024.32.1.27 , Vol.32, No.1, 27 ~ 34, 2024
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| Title |
| Effects of a Granular Activated Carbon Bed Coupled with a Membrane Filtration Process on the Treatment Characteristics of Microplastics in Sewer Pipes |
| 김지연 Ji-yeon Kim , 이석주 Suk-joo Lee , 김홍찬 Hong-chen Kim , 강광원 Gwang-won Kang |
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| Abstract |
| The introduction of microplastics (MPs) into water environments can be broadly categorized into non-point sources, including tire fragments, industrial paint, and dust, where the source of pollution is unidentifiable, and point sources, occurring in identifiable locations such as homes or factories. Hazardous substances stemming from these diverse pollutants accumulate in rainwater chambers along combined sewage conduits. Public sewage treatment plants collect MPs in rainfall-runoff and domestic sewage through sewage pipes. This study analyzes the behavior and properties of MPs during the treatment of combined sewage overflow using membrane filtration (MF) coupled with granular activated carbon (GAC). The study encompassed an average total rainfall of 13.5 mm, a duration of 9.1 h, and a rainfall intensity of 3.7 mm/h. The event mean concentrations for habitation ranged from 3.8 to 22.3 mgTOC/L, 0.841 to 2.695 mgT-N/L, 0.024 to 0.157 mgTP/L, 7.037 to 19.302 mgCl/L. Under conditions of GAC bed <4.0 m/h and MF process at 0.5 ㎥/㎡d, the distribution of MPs was 403 MP/L in the influent into sewer pipes and 80 MP/L in the effluent from the GAC-MF system. This indicates that the GAC-MF system achieved an efficiency of more than 80% in removing MPs, making it a highly effective process for MP removal. The GAC-MF system demonstrated superior performance, producing high-quality finished water and positioning itself as a recommended method for MP removal. |
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| Key Words |
| Event Mean Concentration, Granular Activated Carbon Process, Membrane filtration Process, Microplastics, Sewer Pipes, 유량가중평균농도, 입상활성탄공정, 막여과공정, 미세플라스틱, 하수 분리관 |
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