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External nitrification in biological nutrient removal activated sludge systems
Includes bibliography.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Mechanical Engineering
2014
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| _version_ | 1867613209421152256 |
|---|---|
| access_status_str | Open Access |
| author | Moodley, Rajan |
| author2 | Ekama, George A |
| author_browse | Ekama, George A Moodley, Rajan |
| author_facet | Ekama, George A Moodley, Rajan |
| author_sort | Moodley, Rajan |
| collection | Thesis |
| description | Includes bibliography. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9945 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:29.432Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9945 External nitrification in biological nutrient removal activated sludge systems Moodley, Rajan Ekama, George A Wentzel, Mark C Engineering Includes bibliography. In conventional nitrification-denitrification biological excess phosphorous removal (NDBEPR) activated sludge systems, such as the UCT system for example, both nitrification and phosphorous uptake (P uptake) occur simultaneously in the, usually large, aerobic reactor. In the UCT system the nitrate load to the anoxic reactor is limited by the a-recycle (i.e. system constraint recycle from the aerobic to the anoxic reactor) and the internal aerobic nitrification performance. The latter process, is mediated by the nitrifiers having a slow growth rate of 0.45/d, governs the sludge age of the biological nutrient removal activated sludge (BNRAS) system and thus results in long (20 - 25 day) sludge ages and large aerobic mass fraction requirements to nitrify completely. However, if stable nitrification could be achieved outside the BNRAS external nitrification (EN) system then nitrification and the suspended solids sludge age become uncoupled allowing greater flexibility into the BNRAS system. 2014-12-10T08:13:10Z 2014-12-10T08:13:10Z 1999 Master Thesis Masters MSc http://hdl.handle.net/11427/9945 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Engineering Moodley, Rajan External nitrification in biological nutrient removal activated sludge systems |
| thesis_degree_str | Master's |
| title | External nitrification in biological nutrient removal activated sludge systems |
| title_full | External nitrification in biological nutrient removal activated sludge systems |
| title_fullStr | External nitrification in biological nutrient removal activated sludge systems |
| title_full_unstemmed | External nitrification in biological nutrient removal activated sludge systems |
| title_short | External nitrification in biological nutrient removal activated sludge systems |
| title_sort | external nitrification in biological nutrient removal activated sludge systems |
| topic | Engineering |
| url | http://hdl.handle.net/11427/9945 |
| work_keys_str_mv | AT moodleyrajan externalnitrificationinbiologicalnutrientremovalactivatedsludgesystems |