Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater
An unique up-flow anaerobic stage reactor (UASR) treating pharmaceutical wastewater at various organic loading rate (OLR) was investigated and showed efficient substrate removal at low OLRs (0.43–1.86 kg COD m-3 d-1) by promoting efficient chemical oxygen demand (COD) reduction (70–75%). However, in...
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| Format: | Article |
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Elsevier BV
2011
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| _version_ | 1796858661791858688 |
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| author | Chelliapan, Shreeshivadasan Wilby, Thomas Yuzir, Ali Sallis, Paul J. |
| author_facet | Chelliapan, Shreeshivadasan Wilby, Thomas Yuzir, Ali Sallis, Paul J. |
| author_sort | Chelliapan, Shreeshivadasan |
| collection | ePrints |
| description | An unique up-flow anaerobic stage reactor (UASR) treating pharmaceutical wastewater at various organic loading rate (OLR) was investigated and showed efficient substrate removal at low OLRs (0.43–1.86 kg COD m-3 d-1) by promoting efficient chemical oxygen demand (COD) reduction (70–75%). However, increasing the OLRs to 3.73 kg COD m-3 d-1 by reducing the hydraulic retention time (HRT) (4–2 d) reduced the COD removal efficiency (45%). Fluorescent in situ hybridisation (FISH) analysis showed that the microbial community of the reactor stages was dominated by methanogenic archaea (56–79% of 4', 6 diamidino-2-phenylindole (DAPI)-stained cells in all stages) when the reactor was fed at OLR 0.86–2.98 kg COD m-3 d-1 but decreased in Stage 1 (30% of DAPI-stained cells) when the OLR was at 3.73 kg COD m-3 d-1. The two methanogenic genera detected were Methanosarcina and Methanosaeta. Generally, Methanosaeta dominated the reactor stages when the OLR was 0.86–1.86 kg COD m-3 d-1, while Methanosarcina dominated during the period of high OLR (2.98–3.73 kg COD m-3 d-1). Based on the number of Desulfovibrio cells detected (8–36% of the total eubacteria) in all stages during the entire operation of the reactor, it appears that sulfidogenic bacteria contributed to the overall degradation of organic substances in the pharmaceutical wastewater. |
| first_indexed | 2024-03-05T19:15:44Z |
| format | Article |
| id | utm.eprints-44984 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T19:15:44Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | utm.eprints-449842017-09-20T03:29:23Z http://eprints.utm.my/44984/ Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater Chelliapan, Shreeshivadasan Wilby, Thomas Yuzir, Ali Sallis, Paul J. TD Environmental technology. Sanitary engineering An unique up-flow anaerobic stage reactor (UASR) treating pharmaceutical wastewater at various organic loading rate (OLR) was investigated and showed efficient substrate removal at low OLRs (0.43–1.86 kg COD m-3 d-1) by promoting efficient chemical oxygen demand (COD) reduction (70–75%). However, increasing the OLRs to 3.73 kg COD m-3 d-1 by reducing the hydraulic retention time (HRT) (4–2 d) reduced the COD removal efficiency (45%). Fluorescent in situ hybridisation (FISH) analysis showed that the microbial community of the reactor stages was dominated by methanogenic archaea (56–79% of 4', 6 diamidino-2-phenylindole (DAPI)-stained cells in all stages) when the reactor was fed at OLR 0.86–2.98 kg COD m-3 d-1 but decreased in Stage 1 (30% of DAPI-stained cells) when the OLR was at 3.73 kg COD m-3 d-1. The two methanogenic genera detected were Methanosarcina and Methanosaeta. Generally, Methanosaeta dominated the reactor stages when the OLR was 0.86–1.86 kg COD m-3 d-1, while Methanosarcina dominated during the period of high OLR (2.98–3.73 kg COD m-3 d-1). Based on the number of Desulfovibrio cells detected (8–36% of the total eubacteria) in all stages during the entire operation of the reactor, it appears that sulfidogenic bacteria contributed to the overall degradation of organic substances in the pharmaceutical wastewater. Elsevier BV 2011 Article PeerReviewed Chelliapan, Shreeshivadasan and Wilby, Thomas and Yuzir, Ali and Sallis, Paul J. (2011) Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater. Desalination, 271 . pp. 257-264. ISSN 0011-9164 |
| spellingShingle | TD Environmental technology. Sanitary engineering Chelliapan, Shreeshivadasan Wilby, Thomas Yuzir, Ali Sallis, Paul J. Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title | Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title_full | Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title_fullStr | Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title_full_unstemmed | Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title_short | Influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| title_sort | influence of organic loading on the performance and microbial community structure of an aerobic stage reactor treating pharmaceutical wastewater |
| topic | TD Environmental technology. Sanitary engineering |
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