Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control
The biodegradable dissolved organic carbon (BDOC) in micro-polluted water sources affects the drinking water quality and safety in the urban water supply. The conventional technology of “coagulation-sedimentation-filtration” in a water plant located in the lower reaches of the Yangtze River removed...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/21/4689 |
| _version_ | 1797466689004109824 |
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| author | Ming Chen Shuhuai Shen Fan Zhang Cong Zhang Jianglei Xiong |
| author_facet | Ming Chen Shuhuai Shen Fan Zhang Cong Zhang Jianglei Xiong |
| author_sort | Ming Chen |
| collection | DOAJ |
| description | The biodegradable dissolved organic carbon (BDOC) in micro-polluted water sources affects the drinking water quality and safety in the urban water supply. The conventional technology of “coagulation-sedimentation-filtration” in a water plant located in the lower reaches of the Yangtze River removed dissolved organic carbon (DOC) with a molecular weight (MW) > 30 kDa effectively, but the BDOC elimination only ranged 27.4–58.1%, due to their predominant smaller MW (<1 kDa), leading to a high residual BDOC of 0.22–0.33 mg/L. To ensure the biological stability of drinking water, i.e., the inability to support microbial growth (BDOC < 0.2 mg/L), a pilot-scale ultrafiltration process (UF, made of aromatic polyamide with MW cut-off of 1 kDa) was operated to remove BDOC as an advanced treatment after sand-filtration. Results showed the membrane flux decreased with the increase in the influent BDOC concentration and decrease in operating pressure. With an operating pressure of 0.25 MPa, the BDOC removal by UF reached 80.7%, leading to a biologically stable BDOC concentration of 0.08 mg/L. The fouling of the membrane was mainly caused by organic pollution. The H<sub>2</sub>O<sub>2</sub>–HCl immersion washing method effectively cleaned the membrane surface fouling, with a recovery of membrane flux of 98%. |
| first_indexed | 2024-03-09T18:43:18Z |
| format | Article |
| id | doaj.art-9b0d85504166421b9af32eb7f6784181 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T18:43:18Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-9b0d85504166421b9af32eb7f67841812023-11-24T06:30:17ZengMDPI AGPolymers2073-43602022-11-011421468910.3390/polym14214689Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling ControlMing Chen0Shuhuai Shen1Fan Zhang2Cong Zhang3Jianglei Xiong4School of Civil Engineering, Southeast University, Nanjing 210096, ChinaSchool of Civil Engineering, Southeast University, Nanjing 210096, ChinaHuzhou Ecological Environment Bureau, Changxing Branch, Huzhou 313100, ChinaSchool of Civil Engineering, Southeast University, Nanjing 210096, ChinaChina Electronics System Engineering No.2 Construction Co., Ltd., Wuxi 214115, ChinaThe biodegradable dissolved organic carbon (BDOC) in micro-polluted water sources affects the drinking water quality and safety in the urban water supply. The conventional technology of “coagulation-sedimentation-filtration” in a water plant located in the lower reaches of the Yangtze River removed dissolved organic carbon (DOC) with a molecular weight (MW) > 30 kDa effectively, but the BDOC elimination only ranged 27.4–58.1%, due to their predominant smaller MW (<1 kDa), leading to a high residual BDOC of 0.22–0.33 mg/L. To ensure the biological stability of drinking water, i.e., the inability to support microbial growth (BDOC < 0.2 mg/L), a pilot-scale ultrafiltration process (UF, made of aromatic polyamide with MW cut-off of 1 kDa) was operated to remove BDOC as an advanced treatment after sand-filtration. Results showed the membrane flux decreased with the increase in the influent BDOC concentration and decrease in operating pressure. With an operating pressure of 0.25 MPa, the BDOC removal by UF reached 80.7%, leading to a biologically stable BDOC concentration of 0.08 mg/L. The fouling of the membrane was mainly caused by organic pollution. The H<sub>2</sub>O<sub>2</sub>–HCl immersion washing method effectively cleaned the membrane surface fouling, with a recovery of membrane flux of 98%.https://www.mdpi.com/2073-4360/14/21/4689ultrafiltrationdrinking waterbiological stabilityBDOCmembrane fouling |
| spellingShingle | Ming Chen Shuhuai Shen Fan Zhang Cong Zhang Jianglei Xiong Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control Polymers ultrafiltration drinking water biological stability BDOC membrane fouling |
| title | Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control |
| title_full | Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control |
| title_fullStr | Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control |
| title_full_unstemmed | Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control |
| title_short | Biodegradable Dissolved Organic Carbon (BDOC) Removal from Micro-Polluted Water Source Using Ultrafiltration: Comparison with Conventional Processes, Operation Conditions and Membrane Fouling Control |
| title_sort | biodegradable dissolved organic carbon bdoc removal from micro polluted water source using ultrafiltration comparison with conventional processes operation conditions and membrane fouling control |
| topic | ultrafiltration drinking water biological stability BDOC membrane fouling |
| url | https://www.mdpi.com/2073-4360/14/21/4689 |
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