Air stripping process for ammonia recovery from source-separated urine : modeling and optimization
BACKGROUND: The air stripping process has been widely used to treat wastewater to prevent undesirable substances from impairing the quality of water sources. This study aimed to investigate the operational and economic aspects of air stripping for ammonia recovery from source separated human urine....
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sg-ntu-dr.10356-1017292020-03-07T11:45:53Z Air stripping process for ammonia recovery from source-separated urine : modeling and optimization Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor W.-C. Wang, Jing-Yuan School of Civil and Environmental Engineering Residues and Resource Reclamation Centre Nanyang Environment and Water Research Institute DRNTU::Engineering::Civil engineering::Water resources DRNTU::Engineering::Environmental engineering::Waste management BACKGROUND: The air stripping process has been widely used to treat wastewater to prevent undesirable substances from impairing the quality of water sources. This study aimed to investigate the operational and economic aspects of air stripping for ammonia recovery from source separated human urine. RESULTS: The typical two-film model fails to explain the influence of pH on ammonia recovery. For that reason, modifications to the two-film model were applied to involve ammonia dissociation during mass transfer. It was found that increasing pH enhanced ammonia removal efficiency by promoting the free ammonia fraction in the solution. In addition, high air flow rate and temperature accelerated the stripping process due to the increase in mass transfer coefficient. From the economic point of view, unit operating cost was determined for 80% ammonia recovery. Results indicated that increasing air flow rate and temperature could reduce unit operating cost, whereas high pH could induce high unit operating cost due to the increase in chemical input. CONCLUSION: The modified two-film model can precisely estimate the critical values for an economic, efficient stripping process. However, a test-bedding study is required to validate the experimental findings. 2014-11-10T07:27:35Z 2019-12-06T20:43:28Z 2014-11-10T07:27:35Z 2019-12-06T20:43:28Z 2014 2014 Journal Article Liu, B., Giannis, A., Zhang, J., Chang, V. W. C., & Wang, J. Y. (2014). Air stripping process for ammonia recovery from source-separated urine : modeling and optimization. Journal of chemical technology & biotechnology, 90(12), 2208-2217. 0268-2575 https://hdl.handle.net/10356/101729 http://hdl.handle.net/10220/24208 10.1002/jctb.4535 173884 en Journal of chemical technology & biotechnology © 2014 Society of Chemical Industry. |
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DRNTU::Engineering::Civil engineering::Water resources DRNTU::Engineering::Environmental engineering::Waste management Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor W.-C. Wang, Jing-Yuan Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
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BACKGROUND: The air stripping process has been widely used to treat wastewater to prevent undesirable substances from impairing the quality of water sources. This study aimed to investigate the operational and economic aspects of air stripping for ammonia recovery from source separated human urine. RESULTS: The typical two-film model fails to explain the influence of pH on ammonia recovery. For that reason, modifications to the two-film model were applied to involve ammonia dissociation during mass transfer. It was found that increasing pH enhanced ammonia removal efficiency by promoting the free ammonia fraction in the solution. In addition, high air flow rate and temperature accelerated the stripping process due to the increase in mass transfer coefficient. From the economic point of view, unit operating cost was determined for 80% ammonia recovery. Results indicated that increasing air flow rate and temperature could reduce unit operating cost, whereas high pH could induce high unit operating cost due to the increase in chemical input. CONCLUSION: The modified two-film model can precisely estimate the critical values for an economic, efficient stripping process. However, a test-bedding study is required to validate the experimental findings. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor W.-C. Wang, Jing-Yuan |
format |
Article |
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Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor W.-C. Wang, Jing-Yuan |
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Liu, Bianxia |
title |
Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
title_short |
Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
title_full |
Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
title_fullStr |
Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
title_full_unstemmed |
Air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
title_sort |
air stripping process for ammonia recovery from source-separated urine : modeling and optimization |
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2014 |
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https://hdl.handle.net/10356/101729 http://hdl.handle.net/10220/24208 |
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1681036480621838336 |