Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter
Biological activated carbon (BAC) filters that have been in service for an extended period (over 7 years) may encounter a decline or even a complete loss in the removal efficiency of organic compounds. To investigate the removal efficiency of organic compounds in long-serving BAC filters and propose...
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Editorial Office of Journal of Changjiang River Scientific Research Institute
2025-04-01
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| Series: | 长江科学院院报 |
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| Online Access: | http://ckyyb.crsri.cn/fileup/1001-5485/PDF/1735210291012-449742204.pdf |
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| author | ZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue |
| author_facet | ZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue |
| author_sort | ZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue |
| collection | DOAJ |
| description | Biological activated carbon (BAC) filters that have been in service for an extended period (over 7 years) may encounter a decline or even a complete loss in the removal efficiency of organic compounds. To investigate the removal efficiency of organic compounds in long-serving BAC filters and propose targeted operational optimization strategies, we selected a 12-year-old BAC filter at the LC water treatment plant (WTP) in City Z as our research subject. We analyzed its operational performance by evaluating the total organic carbon (TOC) removal efficiency and explored optimization strategies from the aspects of ozone (O3) dosage and backwashing methods. The results revealed that the LC WTP experienced significant fluctuations in the organic compound removal efficiency, with a high risk of ineffectiveness. Biodegradation is the primary mechanism for organic compound removal in long-serving BAC filters, accounting for approximately 67%, while adsorption only contributes 33%. When the specific O3 dosage ranged from 0.36 to 0.52 mg O3/mg TOC, the BAC filter at the LC WTP performed relatively well. Either too low or too high O3 dosage was unfavorable for enhancing the performance of long-serving BAC filters. At the LC WTP, the TOC levels in the effluent from both the surface and upper layers of the BAC filter increased before backwashing. Backwashing with water containing 0.5 mg/L of effective chlorine can improve the performance of long-serving BAC filters. |
| format | Article |
| id | doaj-art-951524fde2b541869e9a0e5fc42c2cba |
| institution | DOAJ |
| issn | 1001-5485 |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | Editorial Office of Journal of Changjiang River Scientific Research Institute |
| record_format | Article |
| series | 长江科学院院报 |
| spelling | doaj-art-951524fde2b541869e9a0e5fc42c2cba2025-08-20T03:10:49ZzhoEditorial Office of Journal of Changjiang River Scientific Research Institute长江科学院院报1001-54852025-04-01424879610.11988/ckyyb.20240044Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC FilterZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue01 College of Civil Engineering and Architecture, Zhejiang University,Hangzhou 310058,China;2 Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou 310058, China;3 Innovation Center of Yangtze River Delta, Zhejiang University, Jiashan 314100, China;4 Zhoushan Water Supply Co., Ltd., Zhoushan 316021, ChinaBiological activated carbon (BAC) filters that have been in service for an extended period (over 7 years) may encounter a decline or even a complete loss in the removal efficiency of organic compounds. To investigate the removal efficiency of organic compounds in long-serving BAC filters and propose targeted operational optimization strategies, we selected a 12-year-old BAC filter at the LC water treatment plant (WTP) in City Z as our research subject. We analyzed its operational performance by evaluating the total organic carbon (TOC) removal efficiency and explored optimization strategies from the aspects of ozone (O3) dosage and backwashing methods. The results revealed that the LC WTP experienced significant fluctuations in the organic compound removal efficiency, with a high risk of ineffectiveness. Biodegradation is the primary mechanism for organic compound removal in long-serving BAC filters, accounting for approximately 67%, while adsorption only contributes 33%. When the specific O3 dosage ranged from 0.36 to 0.52 mg O3/mg TOC, the BAC filter at the LC WTP performed relatively well. Either too low or too high O3 dosage was unfavorable for enhancing the performance of long-serving BAC filters. At the LC WTP, the TOC levels in the effluent from both the surface and upper layers of the BAC filter increased before backwashing. Backwashing with water containing 0.5 mg/L of effective chlorine can improve the performance of long-serving BAC filters.http://ckyyb.crsri.cn/fileup/1001-5485/PDF/1735210291012-449742204.pdfbac filter|long-term in-service|organic compounds|removal efficiency|total organic carbon|o3 dosage|backwashing methods|operational performance|optimization scheme |
| spellingShingle | ZHANG Ke-jia, LAI Hao-lin, CEN Cheng, ZHOU Pei-xuan, ZHANG Xiao-hong, FU Zhou-yue Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter 长江科学院院报 bac filter|long-term in-service|organic compounds|removal efficiency|total organic carbon|o3 dosage|backwashing methods|operational performance|optimization scheme |
| title | Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter |
| title_full | Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter |
| title_fullStr | Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter |
| title_full_unstemmed | Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter |
| title_short | Organic Compounds Removal Efficiency and Operational Performance Optimization of Long-Term In-Service BAC Filter |
| title_sort | organic compounds removal efficiency and operational performance optimization of long term in service bac filter |
| topic | bac filter|long-term in-service|organic compounds|removal efficiency|total organic carbon|o3 dosage|backwashing methods|operational performance|optimization scheme |
| url | http://ckyyb.crsri.cn/fileup/1001-5485/PDF/1735210291012-449742204.pdf |
| work_keys_str_mv | AT zhangkejialaihaolincenchengzhoupeixuanzhangxiaohongfuzhouyue organiccompoundsremovalefficiencyandoperationalperformanceoptimizationoflongterminservicebacfilter |