A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions
Ascertaining peak oxygen demand is crucial for plant designers to determine blower capacities of wastewater treatment plants in planning phase. To obtain this technical information without cumbersome influent sampling and analysis, a set of field-test activated sludge reac...
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| Format: | Article |
| Language: | English |
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Japan Society on Water Environment
2021-01-01
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| Series: | Journal of Water and Environment Technology |
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| Online Access: |
https://www.jstage.jst.go.jp/article/jwet/19/4/19_20-138/_pdf
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| _version_ | 1818692766396317696 |
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| author | Viet Hoang Nguyen Van Tuan Le Thi Ha Nguyen Xuan Hai Nguyen Viet Anh Nguyen Hidenori Harada Mitsuharu Terashima Hidenari Yasui |
| author_facet | Viet Hoang Nguyen Van Tuan Le Thi Ha Nguyen Xuan Hai Nguyen Viet Anh Nguyen Hidenori Harada Mitsuharu Terashima Hidenari Yasui |
| author_sort | Viet Hoang Nguyen |
| collection | DOAJ |
| description | Ascertaining peak oxygen demand is crucial for plant designers to determine blower capacities of wastewater treatment plants in planning phase. To obtain this technical information without cumbersome influent sampling and analysis, a set of field-test activated sludge reactors equipped with DO and nitrate-N sensors was installed at 3 sites and continuously operated for a couple of months in each field. Under the controlled aeration and hydraulics of the reactors, the hourly influent oxygen demands were back-calculated as biodegradable constituents using the IWA-Activated Sludge Model #1. The daily maximum concentrations (rounded to last for 1-hour) of biodegradable organics and nitrogen were ranged between 45~258 mg-COD/L and 10.4~32.3 mg-N/L in Site #1; 119~244 mg-COD/L and 28.3~38.7 mg-N/L in Site #2; 194~552 mg-COD/L and 30.2~51.7 mg-N/L in Site #3 respectively. The marginal blower capacities to maintain at least 1.0 mg-O2/L of DO in the daily maximum oxygen demand were estimated based on the datasets using the statistical method, Extreme Value Distribution analysis. To maintain the DO concentration for 99 days out of 100 days of the plant operations, the blower capacity was supposed to be designed as high as 1.4~2.2 times than those of the blower calculated from the daily average concentration. |
| first_indexed | 2024-12-17T13:03:00Z |
| format | Article |
| id | doaj.art-acf649a3845c41ee8b31a0b895100276 |
| institution | Directory Open Access Journal |
| issn | 1348-2165 |
| language | English |
| last_indexed | 2024-12-17T13:03:00Z |
| publishDate | 2021-01-01 |
| publisher | Japan Society on Water Environment |
| record_format | Article |
| series | Journal of Water and Environment Technology |
| spelling | doaj.art-acf649a3845c41ee8b31a0b8951002762022-12-21T21:47:19ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21652021-01-0119421222910.2965/jwet.20-13810.2965/jwet.20-138A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather ConditionsViet Hoang Nguyen0Van Tuan Le1Thi Ha Nguyen2Xuan Hai Nguyen3Viet Anh Nguyen4Hidenori Harada5Mitsuharu Terashima6Hidenari Yasui7 Faculty of Environmental Engineering, the University of Kitakyushu, Kitakyushu, Japan Faculty of Environmental Science, University of Sciences - Hue University, Hue, Vietnam Faculty of Environmental Science, Vietnam National University - University of Science, Hanoi, Vietnam Department of Environment Impact Assessment Appraisal, Vietnam Environment Administration, Hanoi, Vietnam Institute of Environmental Science and Engineering, Hanoi University of Civil Engineering, Hanoi, Vietnam Graduate School of Asian and African Area Studies, Kyoto University, Kyoto, Japan Faculty of Environmental Engineering, the University of Kitakyushu, Kitakyushu, Japan Faculty of Environmental Engineering, the University of Kitakyushu, Kitakyushu, Japan Ascertaining peak oxygen demand is crucial for plant designers to determine blower capacities of wastewater treatment plants in planning phase. To obtain this technical information without cumbersome influent sampling and analysis, a set of field-test activated sludge reactors equipped with DO and nitrate-N sensors was installed at 3 sites and continuously operated for a couple of months in each field. Under the controlled aeration and hydraulics of the reactors, the hourly influent oxygen demands were back-calculated as biodegradable constituents using the IWA-Activated Sludge Model #1. The daily maximum concentrations (rounded to last for 1-hour) of biodegradable organics and nitrogen were ranged between 45~258 mg-COD/L and 10.4~32.3 mg-N/L in Site #1; 119~244 mg-COD/L and 28.3~38.7 mg-N/L in Site #2; 194~552 mg-COD/L and 30.2~51.7 mg-N/L in Site #3 respectively. The marginal blower capacities to maintain at least 1.0 mg-O2/L of DO in the daily maximum oxygen demand were estimated based on the datasets using the statistical method, Extreme Value Distribution analysis. To maintain the DO concentration for 99 days out of 100 days of the plant operations, the blower capacity was supposed to be designed as high as 1.4~2.2 times than those of the blower calculated from the daily average concentration. https://www.jstage.jst.go.jp/article/jwet/19/4/19_20-138/_pdf activated sludge modelblower capacitydynamic parameter estimationextreme value distributionstatistical analysis |
| spellingShingle | Viet Hoang Nguyen Van Tuan Le Thi Ha Nguyen Xuan Hai Nguyen Viet Anh Nguyen Hidenori Harada Mitsuharu Terashima Hidenari Yasui A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions Journal of Water and Environment Technology activated sludge model blower capacity dynamic parameter estimation extreme value distribution statistical analysis |
| title | A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions |
| title_full | A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions |
| title_fullStr | A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions |
| title_full_unstemmed | A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions |
| title_short | A Novel Method to Determine Blower Capacity of Wastewater Treatment Plants for Dry and Wet Weather Conditions |
| title_sort | novel method to determine blower capacity of wastewater treatment plants for dry and wet weather conditions |
| topic | activated sludge model blower capacity dynamic parameter estimation extreme value distribution statistical analysis |
| url |
https://www.jstage.jst.go.jp/article/jwet/19/4/19_20-138/_pdf
|
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