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The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance
The main objective of this investigation was to evaluate activated sludge biological nutrient removal (BNR) performance at elevated temperatures for possible application of nitrification denitrification (ND) and ND biological excess phosphorus removal (NDBEPR) systems to municipal wastewater treatme...
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| Format: | Thesis |
| Language: | English |
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Department of Civil Engineering
2016
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| _version_ | 1867613181661151232 |
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| access_status_str | Open Access |
| author | Mellin, Hannu Kaarlo Olavi |
| author2 | Ekama, George A |
| author_browse | Ekama, George A Mellin, Hannu Kaarlo Olavi |
| author_facet | Ekama, George A Mellin, Hannu Kaarlo Olavi |
| author_sort | Mellin, Hannu Kaarlo Olavi |
| collection | Thesis |
| description | The main objective of this investigation was to evaluate activated sludge biological nutrient removal (BNR) performance at elevated temperatures for possible application of nitrification denitrification (ND) and ND biological excess phosphorus removal (NDBEPR) systems to municipal wastewater treatment in the equatorial and tropical regions or to combined treatment of municipal and anaerobically (thermophilic) pretreated paper and pulp industry wastewaters in the very cold northern forested regions. To accomplish this objective, a ND Modified Ludzack Ettinger (MLE) system and a NDBEPR University of Cape Town (UCT) system were operated at 30°C and 10 days sludge age for a period of 582 days. During the investigation 41 sewage batches, each lasting about two weeks, of real sewage from the Mitchells Plain municipal wastewater treatment plant (Western Cape, South Africa) were fed to the systems. The two systems were sampled and tested ,almost daily for Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), Free and Saline Ammonia (FSA), nitrate, nitrite, Total Phosphorus, Volatile Settleable Solids (VSS), Total Settleable Solids (TSS), pH, Oxygen Utilization Rate (OUR) and diluted sludge volume index (DSVI) in the influent, anaerobic, anoxic and aerobic reactors and effluent as appropriate. Also, in order to determine the kinetic rates of nitrification, denitrification and readily biodegradable COD (RBCOD) conversion to Volatile Fatty Acids (VF A), aerobic, anoxic and anaerobic batch tests were conducted at 30°C on sludge harvested from the two systems and microscopic examination of the sludges was undertaken every four weeks to identify the filamentous organisms in the systems. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/21729 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:03.909Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Civil Engineering |
| publisherStr | Department of Civil Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/21729 The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance Mellin, Hannu Kaarlo Olavi Ekama, George A Wentzel, Mark C Civil Engineering The main objective of this investigation was to evaluate activated sludge biological nutrient removal (BNR) performance at elevated temperatures for possible application of nitrification denitrification (ND) and ND biological excess phosphorus removal (NDBEPR) systems to municipal wastewater treatment in the equatorial and tropical regions or to combined treatment of municipal and anaerobically (thermophilic) pretreated paper and pulp industry wastewaters in the very cold northern forested regions. To accomplish this objective, a ND Modified Ludzack Ettinger (MLE) system and a NDBEPR University of Cape Town (UCT) system were operated at 30°C and 10 days sludge age for a period of 582 days. During the investigation 41 sewage batches, each lasting about two weeks, of real sewage from the Mitchells Plain municipal wastewater treatment plant (Western Cape, South Africa) were fed to the systems. The two systems were sampled and tested ,almost daily for Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), Free and Saline Ammonia (FSA), nitrate, nitrite, Total Phosphorus, Volatile Settleable Solids (VSS), Total Settleable Solids (TSS), pH, Oxygen Utilization Rate (OUR) and diluted sludge volume index (DSVI) in the influent, anaerobic, anoxic and aerobic reactors and effluent as appropriate. Also, in order to determine the kinetic rates of nitrification, denitrification and readily biodegradable COD (RBCOD) conversion to Volatile Fatty Acids (VF A), aerobic, anoxic and anaerobic batch tests were conducted at 30°C on sludge harvested from the two systems and microscopic examination of the sludges was undertaken every four weeks to identify the filamentous organisms in the systems. 2016-09-12T08:32:33Z 2016-09-12T08:32:33Z 1999 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/21729 eng application/pdf Department of Civil Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Civil Engineering Mellin, Hannu Kaarlo Olavi The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| thesis_degree_str | Master's |
| title | The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| title_full | The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| title_fullStr | The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| title_full_unstemmed | The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| title_short | The effect of high temperatures (30 degrees Celsius) on biological nutrient removal performance |
| title_sort | effect of high temperatures 30 degrees celsius on biological nutrient removal performance |
| topic | Civil Engineering |
| url | http://hdl.handle.net/11427/21729 |
| work_keys_str_mv | AT mellinhannukaarloolavi theeffectofhightemperatures30degreescelsiusonbiologicalnutrientremovalperformance AT mellinhannukaarloolavi effectofhightemperatures30degreescelsiusonbiologicalnutrientremovalperformance |