Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems
The biostability concept has been successfully used to predict the onset of nitrification in drinking water distribution systems, but in certain cases deficiencies have been observed in the predictions, indicating that modifications to parameters were needed. At the biostable disinfectant residual c...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/23452 |
| _version_ | 1848751154916229120 |
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| author | Sarker, Dipok Sathasivan, Arumugam Joll, Cynthia Heitz, Anna |
| author_facet | Sarker, Dipok Sathasivan, Arumugam Joll, Cynthia Heitz, Anna |
| author_sort | Sarker, Dipok |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The biostability concept has been successfully used to predict the onset of nitrification in drinking water distribution systems, but in certain cases deficiencies have been observed in the predictions, indicating that modifications to parameters were needed. At the biostable disinfectant residual concentration (BRC), the rate of ammonia-oxidising bacterial (AOB) growth due to the substrate (free ammonia) and the rate of inactivation due to the disinfectant are balanced. Growth and inactivation rates vary greatly with temperature, but temperature is yet to be considered in the biostability equation. In this paper, two separate novel models are proposed which take into account the temperature effects on the biostability equation. First, a novel model of specific growth rate variability with temperature was shown to be valid for different bacterial species. Then, the biostability model was modified and validated for ammonia-oxidising bacterial activity using data collected from laboratory and full-scale distribution systems. The proposed model has two important uses: while the specific growth rate model and biostability model can be widely adopted for many microbes, the biostability model for AOB also has the potential to aid water utilities in disinfectant residual management throughout yearly temperature variations. |
| first_indexed | 2025-11-14T07:48:13Z |
| format | Journal Article |
| id | curtin-20.500.11937-23452 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:48:13Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-234522017-09-13T16:00:11Z Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems Sarker, Dipok Sathasivan, Arumugam Joll, Cynthia Heitz, Anna Temperature effects Free ammonia Nitrification Biostability curve Biostability Ammonia-oxidising bacteria The biostability concept has been successfully used to predict the onset of nitrification in drinking water distribution systems, but in certain cases deficiencies have been observed in the predictions, indicating that modifications to parameters were needed. At the biostable disinfectant residual concentration (BRC), the rate of ammonia-oxidising bacterial (AOB) growth due to the substrate (free ammonia) and the rate of inactivation due to the disinfectant are balanced. Growth and inactivation rates vary greatly with temperature, but temperature is yet to be considered in the biostability equation. In this paper, two separate novel models are proposed which take into account the temperature effects on the biostability equation. First, a novel model of specific growth rate variability with temperature was shown to be valid for different bacterial species. Then, the biostability model was modified and validated for ammonia-oxidising bacterial activity using data collected from laboratory and full-scale distribution systems. The proposed model has two important uses: while the specific growth rate model and biostability model can be widely adopted for many microbes, the biostability model for AOB also has the potential to aid water utilities in disinfectant residual management throughout yearly temperature variations. 2013 Journal Article http://hdl.handle.net/20.500.11937/23452 10.1016/j.scitotenv.2013.02.045 Elsevier restricted |
| spellingShingle | Temperature effects Free ammonia Nitrification Biostability curve Biostability Ammonia-oxidising bacteria Sarker, Dipok Sathasivan, Arumugam Joll, Cynthia Heitz, Anna Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title | Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title_full | Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title_fullStr | Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title_full_unstemmed | Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title_short | Modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| title_sort | modelling temperature effects on ammonia-oxidising bacterial biostability in chloraminated systems |
| topic | Temperature effects Free ammonia Nitrification Biostability curve Biostability Ammonia-oxidising bacteria |
| url | http://hdl.handle.net/20.500.11937/23452 |