Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation
Globally, sustainable water management is required to minimize water security, and soil aquifer treatments (SATs) are widely applied in wastewater reclamation. Clogging problems limit the sustainable operation of SATs (i.e., the decrease of infiltration rate), and Physical clogging has been widely s...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-01-01
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| Series: | Water Cycle |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666445322000046 |
| _version_ | 1811304230424674304 |
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| author | Vu Kiem Thuy Kai He Shinya Echigo Yasuhiro Asada Sadahiko Itoh |
| author_facet | Vu Kiem Thuy Kai He Shinya Echigo Yasuhiro Asada Sadahiko Itoh |
| author_sort | Vu Kiem Thuy |
| collection | DOAJ |
| description | Globally, sustainable water management is required to minimize water security, and soil aquifer treatments (SATs) are widely applied in wastewater reclamation. Clogging problems limit the sustainable operation of SATs (i.e., the decrease of infiltration rate), and Physical clogging has been widely studied. However, the effect of biological clogging on the operation of SATs is still unclear. Thus, this study focuses on the effects of biological clogging in an SAT system and demonstrates that the clogging process in an SAT column. In this study, the infiltration rate in the A2O + NaN3 water column decreased slightly, to 6–7 cm/h with an average rate of 0.01 cm/h per month after 240 d, compared with an average rate of 0.3 cm/h per month in the columns fed by filtered A2O water. The fastest reduction in infiltration rate, caused by biological clogging, occurred in the first 60 d and corresponded to the highest reduction in hydraulic conductivity of 0–2.5 cm layer. For alleviating clogging, this study illustrated that removing suspended solids from A2O water by filtration helped reduce approximately 25% of polysaccharides and heterotrophic bacteria. In comparison, pre-ozonation of A2O water helped to reduce approximately 70% of the biomass in the surface layer of the A2O + O3 column. Thus, ozonation of wastewater effluent helps control biological clogging in SAT. |
| first_indexed | 2024-04-13T08:02:15Z |
| format | Article |
| id | doaj.art-3a0e33bded7945a69518c853bb36a366 |
| institution | Directory Open Access Journal |
| issn | 2666-4453 |
| language | English |
| last_indexed | 2024-04-13T08:02:15Z |
| publishDate | 2022-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water Cycle |
| spelling | doaj.art-3a0e33bded7945a69518c853bb36a3662022-12-22T02:55:15ZengKeAi Communications Co., Ltd.Water Cycle2666-44532022-01-0133543Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamationVu Kiem Thuy0Kai He1Shinya Echigo2Yasuhiro Asada3Sadahiko Itoh4School of Environmental Science and Technology, Hanoi University of Science and Technology, Hai Ba Trung District, Hanoi, 11615, Viet Nam; Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto, 615-8540, JapanSchool of Civil Engineering, Sun Yat-Sen University, Guangzhou, 51000, ChinaGraduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo, Kyoto, 606-8501, Japan; Corresponding author.Department of Environmental Health, National Institute of Public Health, Wako, Saitama, 351-0197, JapanDepartment of Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto, 615-8540, JapanGlobally, sustainable water management is required to minimize water security, and soil aquifer treatments (SATs) are widely applied in wastewater reclamation. Clogging problems limit the sustainable operation of SATs (i.e., the decrease of infiltration rate), and Physical clogging has been widely studied. However, the effect of biological clogging on the operation of SATs is still unclear. Thus, this study focuses on the effects of biological clogging in an SAT system and demonstrates that the clogging process in an SAT column. In this study, the infiltration rate in the A2O + NaN3 water column decreased slightly, to 6–7 cm/h with an average rate of 0.01 cm/h per month after 240 d, compared with an average rate of 0.3 cm/h per month in the columns fed by filtered A2O water. The fastest reduction in infiltration rate, caused by biological clogging, occurred in the first 60 d and corresponded to the highest reduction in hydraulic conductivity of 0–2.5 cm layer. For alleviating clogging, this study illustrated that removing suspended solids from A2O water by filtration helped reduce approximately 25% of polysaccharides and heterotrophic bacteria. In comparison, pre-ozonation of A2O water helped to reduce approximately 70% of the biomass in the surface layer of the A2O + O3 column. Thus, ozonation of wastewater effluent helps control biological clogging in SAT.http://www.sciencedirect.com/science/article/pii/S2666445322000046Soil aquifer treatmentWastewater reclamationBiological cloggingBiomassOzonation |
| spellingShingle | Vu Kiem Thuy Kai He Shinya Echigo Yasuhiro Asada Sadahiko Itoh Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation Water Cycle Soil aquifer treatment Wastewater reclamation Biological clogging Biomass Ozonation |
| title | Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| title_full | Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| title_fullStr | Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| title_full_unstemmed | Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| title_short | Impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| title_sort | impact of biological clogging and pretreatments on the operation of soil aquifer treatments for wastewater reclamation |
| topic | Soil aquifer treatment Wastewater reclamation Biological clogging Biomass Ozonation |
| url | http://www.sciencedirect.com/science/article/pii/S2666445322000046 |
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