Startup and initial operation of an MLE-MABR treating municipal wastewater
A 630 m3/d pilot plant was installed at Subiaco WRRF to determine design and operational parameters of a hybrid Modified Ludzack-Ettinger – Membrane Aerated Biofilm Reactor (MLE-MABR) configuration. Two commercial ZeeLung MABR cassettes were installed in series in the anoxic zone and the pilot was f...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-02-01
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| Series: | Water Science and Technology |
| Subjects: | |
| Online Access: | http://wst.iwaponline.com/content/85/4/1155 |
| _version_ | 1819018276194222080 |
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| author | Isabel Telles Silveira Keith Cadee Wayne Bagg |
| author_facet | Isabel Telles Silveira Keith Cadee Wayne Bagg |
| author_sort | Isabel Telles Silveira |
| collection | DOAJ |
| description | A 630 m3/d pilot plant was installed at Subiaco WRRF to determine design and operational parameters of a hybrid Modified Ludzack-Ettinger – Membrane Aerated Biofilm Reactor (MLE-MABR) configuration. Two commercial ZeeLung MABR cassettes were installed in series in the anoxic zone and the pilot was fed with primary effluent (averaging COD 601 mg/L, TKN 68.5 mg/L and 17–29 °C). A nitrifying biofilm was developed within 3 weeks and the nitrous oxide (N2O) gas emissions from the MABR exhaust gas proved to be a reliable parameter to assess biofilm development. Both MABRs achieved the average nitrification rate (NR) of 3.7 gNH4-N/m2.d when air flow was 8.6 and 11.2 Nm3/h to MABR1 and MABR2 respectively, which reached a maximum oxygen transfer rate of 17.4 gO2/m2.d. Biofilm thickness was controlled via air scouring and intermittent coarse bubble mixing (90 s on/90 s off). This paper discusses the startup strategy, minimum requirements for process monitoring, impact of different air flow conditions, ORP and mixing patterns on performance efficiency over a 22-week period. HIGHLIGHTS
Nitrifying biofilm is developed in 3 weeks in an MABR.;
N2O emissions from MABR exhaust gas is a reliable parameter for start-up monitoring.;
Monitoring of O2% in the MABR exhaust gas coupled with ammonia concentration in the wastewater are satisfactory parameters for process performance evaluation.;
It appears possible to install MABR technology in the anoxic zone of an MLE process with no major process changes.; |
| first_indexed | 2024-12-21T03:16:51Z |
| format | Article |
| id | doaj.art-13c32491c2e643e0baad22519bc83b69 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-21T03:16:51Z |
| publishDate | 2022-02-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-13c32491c2e643e0baad22519bc83b692022-12-21T19:17:49ZengIWA PublishingWater Science and Technology0273-12231996-97322022-02-018541155116610.2166/wst.2022.045045Startup and initial operation of an MLE-MABR treating municipal wastewaterIsabel Telles Silveira0Keith Cadee1Wayne Bagg2 Water Corporation, 629 Newcastle St, Leederville, WA 6007, Australia Faculty of Science and Engineering, Curtin University, Kent St, Bentley, WA 6102, Australia Water Corporation, 629 Newcastle St, Leederville, WA 6007, Australia A 630 m3/d pilot plant was installed at Subiaco WRRF to determine design and operational parameters of a hybrid Modified Ludzack-Ettinger – Membrane Aerated Biofilm Reactor (MLE-MABR) configuration. Two commercial ZeeLung MABR cassettes were installed in series in the anoxic zone and the pilot was fed with primary effluent (averaging COD 601 mg/L, TKN 68.5 mg/L and 17–29 °C). A nitrifying biofilm was developed within 3 weeks and the nitrous oxide (N2O) gas emissions from the MABR exhaust gas proved to be a reliable parameter to assess biofilm development. Both MABRs achieved the average nitrification rate (NR) of 3.7 gNH4-N/m2.d when air flow was 8.6 and 11.2 Nm3/h to MABR1 and MABR2 respectively, which reached a maximum oxygen transfer rate of 17.4 gO2/m2.d. Biofilm thickness was controlled via air scouring and intermittent coarse bubble mixing (90 s on/90 s off). This paper discusses the startup strategy, minimum requirements for process monitoring, impact of different air flow conditions, ORP and mixing patterns on performance efficiency over a 22-week period. HIGHLIGHTS Nitrifying biofilm is developed in 3 weeks in an MABR.; N2O emissions from MABR exhaust gas is a reliable parameter for start-up monitoring.; Monitoring of O2% in the MABR exhaust gas coupled with ammonia concentration in the wastewater are satisfactory parameters for process performance evaluation.; It appears possible to install MABR technology in the anoxic zone of an MLE process with no major process changes.;http://wst.iwaponline.com/content/85/4/1155mabrn2o emissionnitrification ratestartup |
| spellingShingle | Isabel Telles Silveira Keith Cadee Wayne Bagg Startup and initial operation of an MLE-MABR treating municipal wastewater Water Science and Technology mabr n2o emission nitrification rate startup |
| title | Startup and initial operation of an MLE-MABR treating municipal wastewater |
| title_full | Startup and initial operation of an MLE-MABR treating municipal wastewater |
| title_fullStr | Startup and initial operation of an MLE-MABR treating municipal wastewater |
| title_full_unstemmed | Startup and initial operation of an MLE-MABR treating municipal wastewater |
| title_short | Startup and initial operation of an MLE-MABR treating municipal wastewater |
| title_sort | startup and initial operation of an mle mabr treating municipal wastewater |
| topic | mabr n2o emission nitrification rate startup |
| url | http://wst.iwaponline.com/content/85/4/1155 |
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