Optimization of operating parameters for aggregation under magnetic field by response surface methodology
Batch tests were employed to estimate the optimal conditions for improving the settle ability of activated sludge through aggregation under magnetic field. A four - factor central composite design (CCD) was employed to find out the interaction effects of the variables while response surface methodol...
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| Format: | Article |
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Asian Research Publishing Network
2016
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| _version_ | 1796862176629096448 |
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| author | Zaidi, Nur Syamimi Muda, Khalida Sohaili, Johan Toemen, Susilawati Yusof, Nur Zulaikha |
| author_facet | Zaidi, Nur Syamimi Muda, Khalida Sohaili, Johan Toemen, Susilawati Yusof, Nur Zulaikha |
| author_sort | Zaidi, Nur Syamimi |
| collection | ePrints |
| description | Batch tests were employed to estimate the optimal conditions for improving the settle ability of activated sludge through aggregation under magnetic field. A four - factor central composite design (CCD) was employed to find out the interaction effects of the variables while response surface methodology (RSM) was utilized for process optimization. Four independent variables, viz. magnetic field (15.0 - 88.0 mT), exposure time (0.5 - 48.0 hrs), biomass concentration (2000 - 4000 mg l-1 ) and mixing intensity (200 - 400 rpm) was built to predict the responses. Analysis of variance (ANOVA) was used to evaluate the significance of the independent variables and their interactions. At the optimum conditions of 88.0 mT magnetic field, 16.5 hrs of exposure time, 2800 mg l-1 of biomass concentration and 300 rpm of mixing intensity, the aggregation achieved its maximum value by 99.0%. The element analysis showed that the applied magnetic field is potential to enhance the settling property of the activated sludge by improving its aggregation. |
| first_indexed | 2024-03-05T20:07:36Z |
| format | Article |
| id | utm.eprints-74136 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T20:07:36Z |
| publishDate | 2016 |
| publisher | Asian Research Publishing Network |
| record_format | dspace |
| spelling | utm.eprints-741362017-11-28T05:01:14Z http://eprints.utm.my/74136/ Optimization of operating parameters for aggregation under magnetic field by response surface methodology Zaidi, Nur Syamimi Muda, Khalida Sohaili, Johan Toemen, Susilawati Yusof, Nur Zulaikha TA Engineering (General). Civil engineering (General) Batch tests were employed to estimate the optimal conditions for improving the settle ability of activated sludge through aggregation under magnetic field. A four - factor central composite design (CCD) was employed to find out the interaction effects of the variables while response surface methodology (RSM) was utilized for process optimization. Four independent variables, viz. magnetic field (15.0 - 88.0 mT), exposure time (0.5 - 48.0 hrs), biomass concentration (2000 - 4000 mg l-1 ) and mixing intensity (200 - 400 rpm) was built to predict the responses. Analysis of variance (ANOVA) was used to evaluate the significance of the independent variables and their interactions. At the optimum conditions of 88.0 mT magnetic field, 16.5 hrs of exposure time, 2800 mg l-1 of biomass concentration and 300 rpm of mixing intensity, the aggregation achieved its maximum value by 99.0%. The element analysis showed that the applied magnetic field is potential to enhance the settling property of the activated sludge by improving its aggregation. Asian Research Publishing Network 2016 Article PeerReviewed Zaidi, Nur Syamimi and Muda, Khalida and Sohaili, Johan and Toemen, Susilawati and Yusof, Nur Zulaikha (2016) Optimization of operating parameters for aggregation under magnetic field by response surface methodology. ARPN Journal of Engineering and Applied Sciences, 11 (4). pp. 2419-2425. ISSN 1819-6608 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960328234&partnerID=40&md5=77d76d171a35adfce5089a64ddb09ea7 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Zaidi, Nur Syamimi Muda, Khalida Sohaili, Johan Toemen, Susilawati Yusof, Nur Zulaikha Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title | Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title_full | Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title_fullStr | Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title_full_unstemmed | Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title_short | Optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| title_sort | optimization of operating parameters for aggregation under magnetic field by response surface methodology |
| topic | TA Engineering (General). Civil engineering (General) |
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