Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed
Over recent decades, the rural areas of Korea, including containing source waters, have become extensively developed. Combined sewer systems (CSSs) have been constructed to collect the sewage generated from these areas. Presently, it is common to experience localized heavy rain events, likely due to...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-12-01
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| Series: | Water-Energy Nexus |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2588912523000206 |
| _version_ | 1827581105516052480 |
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| author | Ingyu Lee Minsoo Kim Antukh Tatsiana Jung-joon Hwang Yongjun Yoon Hyunook Kim |
| author_facet | Ingyu Lee Minsoo Kim Antukh Tatsiana Jung-joon Hwang Yongjun Yoon Hyunook Kim |
| author_sort | Ingyu Lee |
| collection | DOAJ |
| description | Over recent decades, the rural areas of Korea, including containing source waters, have become extensively developed. Combined sewer systems (CSSs) have been constructed to collect the sewage generated from these areas. Presently, it is common to experience localized heavy rain events, likely due to climate change, and sometimes, the volume of rainfall can become too high for a CSS to handle. In these cases, combined sewer overflow (CSOs) occurs, contaminating surface water, which may have been used as source water. Therefore, the Korean government will begin regulating the biochemical oxygen demand (BOD) of CSOs occurring during first flushes of less than 40 mg/L from 2024 onwards. In this study, a biofiltration-based technology was proposed to treat CSOs. Thus, this study aimed to remove BOD from CSO using this biofiltration system to contain cube-type media. For this, two different loading rates were tested on a pilot scale. Although the proposed system resulted in a footprint of only 10 % of that of a conventional activated sludge system, it was still capable of achieving efficient BOD removal. At a high loading rate, BOD removal efficiency was observed at approximately 53 %, and when this loading rate was reduced by 50 %, the removal efficiency was slightly improved to about 58 %. In both cases, the BODs of treated CSOs could be maintained below the proposed future standard: 31 mg/L and 28 mg/L for high and low loading rates, respectively. Therefore, the proposed system could potentially be preventing environmental contamination from COSs. |
| first_indexed | 2024-03-08T22:31:39Z |
| format | Article |
| id | doaj.art-ba55d0f6531744f58dbdf8fd101748b9 |
| institution | Directory Open Access Journal |
| issn | 2588-9125 |
| language | English |
| last_indexed | 2024-03-08T22:31:39Z |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water-Energy Nexus |
| spelling | doaj.art-ba55d0f6531744f58dbdf8fd101748b92023-12-18T04:24:52ZengKeAi Communications Co., Ltd.Water-Energy Nexus2588-91252023-12-016151159Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershedIngyu Lee0Minsoo Kim1Antukh Tatsiana2Jung-joon Hwang3Yongjun Yoon4Hyunook Kim5Department of Environmental Engineering, University of Seoul, Seoul 02504, Republic of KoreaDepartment of Environmental Engineering, University of Seoul, Seoul 02504, Republic of KoreaDepartment of Environmental Engineering, University of Seoul, Seoul 02504, Republic of KoreaWastewater Treatment Business Team of Downstream Division, BKT Co., Ltd., Daejeon 34109, Republic of KoreaWastewater Treatment Business Team of Downstream Division, BKT Co., Ltd., Daejeon 34109, Republic of KoreaDepartment of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea; Corresponding author.Over recent decades, the rural areas of Korea, including containing source waters, have become extensively developed. Combined sewer systems (CSSs) have been constructed to collect the sewage generated from these areas. Presently, it is common to experience localized heavy rain events, likely due to climate change, and sometimes, the volume of rainfall can become too high for a CSS to handle. In these cases, combined sewer overflow (CSOs) occurs, contaminating surface water, which may have been used as source water. Therefore, the Korean government will begin regulating the biochemical oxygen demand (BOD) of CSOs occurring during first flushes of less than 40 mg/L from 2024 onwards. In this study, a biofiltration-based technology was proposed to treat CSOs. Thus, this study aimed to remove BOD from CSO using this biofiltration system to contain cube-type media. For this, two different loading rates were tested on a pilot scale. Although the proposed system resulted in a footprint of only 10 % of that of a conventional activated sludge system, it was still capable of achieving efficient BOD removal. At a high loading rate, BOD removal efficiency was observed at approximately 53 %, and when this loading rate was reduced by 50 %, the removal efficiency was slightly improved to about 58 %. In both cases, the BODs of treated CSOs could be maintained below the proposed future standard: 31 mg/L and 28 mg/L for high and low loading rates, respectively. Therefore, the proposed system could potentially be preventing environmental contamination from COSs.http://www.sciencedirect.com/science/article/pii/S2588912523000206Combined sewer overflowBiofiltrationBiochemical Oxygen Demand (BOD)Environmental contaminationRemoval efficiency |
| spellingShingle | Ingyu Lee Minsoo Kim Antukh Tatsiana Jung-joon Hwang Yongjun Yoon Hyunook Kim Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed Water-Energy Nexus Combined sewer overflow Biofiltration Biochemical Oxygen Demand (BOD) Environmental contamination Removal efficiency |
| title | Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed |
| title_full | Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed |
| title_fullStr | Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed |
| title_full_unstemmed | Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed |
| title_short | Prevention of water pollution through combined sewer overflow using high-speed biofiltration in urban watershed |
| title_sort | prevention of water pollution through combined sewer overflow using high speed biofiltration in urban watershed |
| topic | Combined sewer overflow Biofiltration Biochemical Oxygen Demand (BOD) Environmental contamination Removal efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S2588912523000206 |
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