Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
Control and operation of a hybrid granular sludge reactor are mainly related to biological behavior of the granules under different process conditions. In this study, a 1-l digester was used to examine biological activity of the granules grown in a hybrid anaerobic reactor (AHR). The biogas producti...
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| Format: | Article |
| Language: | English |
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2009
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| Online Access: | http://scholars.utp.edu.my/id/eprint/15/ http://scholars.utp.edu.my/id/eprint/15/1/paper.pdf |
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| author | Zinatizadeh, A.A.L. Younesi, H. Bonakdari, H. Pirsaheb, M. Pazouki, M. Najafpour, G.D. Mohamed Hasnain, Isa |
| author_facet | Zinatizadeh, A.A.L. Younesi, H. Bonakdari, H. Pirsaheb, M. Pazouki, M. Najafpour, G.D. Mohamed Hasnain, Isa |
| author_sort | Zinatizadeh, A.A.L. |
| building | UTP Institutional Repository |
| collection | Online Access |
| description | Control and operation of a hybrid granular sludge reactor are mainly related to biological behavior of the granules under different process conditions. In this study, a 1-l digester was used to examine biological activity of the granules grown in a hybrid anaerobic reactor (AHR). The biogas production process was modeled and analyzed with three-process variables viz., influent COD (3000, 6500 and 10,000 mg COD/l), biomass concentration (2000, 4000 and 6000 mg VSS/l) and initial alkalinity (200, 1100 and 2000 mg CaCO<sub>3</sub>/l). Experiments were conducted based on a central composite face-centered design (CCFD) and analyzed using response surface methodology (RSM). In order to carry out a comprehensive analysis of the biogas production process, the indicative parameters viz., specific methanogenic activity (SMA), bicarbonate alkalinity produced-to-COD removed ratio, and COD removal were studied as the response. The maximum SMA was modeled to be 0.99 g CH<sub>4</sub>-COD/g VSS d under COD<sub>in</sub>, initial bicarbonate alkalinity (BA) and biomass concentrations of 10,000 mg COD/l, 2000 mg CaCO<sub>3</sub>/l and 2000 mg VSS/l, respectively, while the observed value was 1.039 g CH<sub>4</sub>-COD/g VSS d. The maximum COD removal was achieved at the condition when the influent COD was within the range of 4250-5250 mg/l and initial BA was more than 1100 mg CaCO<sub>3</sub>/l. Initial BA and COD<sub>in</sub> played an important role in the production of bicarbonate alkalinity during the digestion process. © 2008 Elsevier Ltd. All rights reserved.
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| first_indexed | 2025-11-13T07:21:54Z |
| format | Article |
| id | oai:scholars.utp.edu.my:15 |
| institution | Universiti Teknologi Petronas |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-13T07:21:54Z |
| publishDate | 2009 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:scholars.utp.edu.my:152017-01-19T08:26:00Z http://scholars.utp.edu.my/id/eprint/15/ Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor Zinatizadeh, A.A.L. Younesi, H. Bonakdari, H. Pirsaheb, M. Pazouki, M. Najafpour, G.D. Mohamed Hasnain, Isa TA Engineering (General). Civil engineering (General) Control and operation of a hybrid granular sludge reactor are mainly related to biological behavior of the granules under different process conditions. In this study, a 1-l digester was used to examine biological activity of the granules grown in a hybrid anaerobic reactor (AHR). The biogas production process was modeled and analyzed with three-process variables viz., influent COD (3000, 6500 and 10,000 mg COD/l), biomass concentration (2000, 4000 and 6000 mg VSS/l) and initial alkalinity (200, 1100 and 2000 mg CaCO<sub>3</sub>/l). Experiments were conducted based on a central composite face-centered design (CCFD) and analyzed using response surface methodology (RSM). In order to carry out a comprehensive analysis of the biogas production process, the indicative parameters viz., specific methanogenic activity (SMA), bicarbonate alkalinity produced-to-COD removed ratio, and COD removal were studied as the response. The maximum SMA was modeled to be 0.99 g CH<sub>4</sub>-COD/g VSS d under COD<sub>in</sub>, initial bicarbonate alkalinity (BA) and biomass concentrations of 10,000 mg COD/l, 2000 mg CaCO<sub>3</sub>/l and 2000 mg VSS/l, respectively, while the observed value was 1.039 g CH<sub>4</sub>-COD/g VSS d. The maximum COD removal was achieved at the condition when the influent COD was within the range of 4250-5250 mg/l and initial BA was more than 1100 mg CaCO<sub>3</sub>/l. Initial BA and COD<sub>in</sub> played an important role in the production of bicarbonate alkalinity during the digestion process. © 2008 Elsevier Ltd. All rights reserved. 2009 Article NonPeerReviewed application/pdf en http://scholars.utp.edu.my/id/eprint/15/1/paper.pdf Zinatizadeh, A.A.L. and Younesi, H. and Bonakdari, H. and Pirsaheb, M. and Pazouki, M. and Najafpour, G.D. and Mohamed Hasnain, Isa (2009) Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor. Renewable Energy, 34 (5). pp. 1245-1251. ISSN 9601481 10.1016/j.renene.2008.10.013 10.1016/j.renene.2008.10.013 10.1016/j.renene.2008.10.013 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Zinatizadeh, A.A.L. Younesi, H. Bonakdari, H. Pirsaheb, M. Pazouki, M. Najafpour, G.D. Mohamed Hasnain, Isa Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor |
| title | Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
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| title_full | Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
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| title_fullStr | Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
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| title_full_unstemmed | Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
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| title_short | Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
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| title_sort | effects of process factors on biological activity of granular sludge grown in an uasff bioreactor |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://scholars.utp.edu.my/id/eprint/15/ http://scholars.utp.edu.my/id/eprint/15/ http://scholars.utp.edu.my/id/eprint/15/1/paper.pdf |