Enhanced biological phosphorus removal from wastewater in the tropics
Enhanced Biological Phosphorus Removal (EBPR) is a phosphors (P) removal method that utilizes the capacity of Polyphosphate Accumulating Organisms (PAOs) to store P more than what is needed for growth. Conventionally, warm temperatures are thought to adversely affect EBPR, while presence of anaerobi...
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| Format: | Thesis |
| Language: | English |
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2018
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| Online Access: | http://hdl.handle.net/10356/75924 |
| _version_ | 1826122971660419072 |
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| author | Cokro, Angel Anisa |
| author2 | Stefan Wuertz |
| author_facet | Stefan Wuertz Cokro, Angel Anisa |
| author_sort | Cokro, Angel Anisa |
| collection | NTU |
| description | Enhanced Biological Phosphorus Removal (EBPR) is a phosphors (P) removal method that utilizes the capacity of Polyphosphate Accumulating Organisms (PAOs) to store P more than what is needed for growth. Conventionally, warm temperatures are thought to adversely affect EBPR, while presence of anaerobic stage with distinct separation of carbon and electron acceptors is considered fundamental for successful EBPR. However, recent findings have challenged these paradigms. This dissertation investigated EBPR at warm temperatures when carbon like volatile fatty acids (VFAs) and electron acceptors (e.g. nitrate and/or nitrite) were concomitantly present. Additionally, this thesis also explored a potential strategy to resuscitate failing EBPR systems at warm temperature via addition of wasted activated sludge (WAS).
This dissertation showed that non-denitrifying PAOs (non-DPAOs), a group of PAOs that cannot use nitrate and/or nitrite as electron acceptors could carry out EBPR despite the simultaneous presence of carbon and nitrate/nitrite, potentially eliminated the needs for anaerobic stage. However, long term stability of anoxic/aerobic EBPR at warm temperature was influenced by proliferation of non-PAO organisms like certain types of Glycogen Accumulating Organisms (GAOs) or heterotrophic denitrifiers that could compete for carbon. Additionally, WAS addition showed promising potential to be developed as cheap alternative to resuscitate deteriorating EBPR systems. |
| first_indexed | 2024-10-01T05:56:58Z |
| format | Thesis |
| id | ntu-10356/75924 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:56:58Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/759242023-03-03T19:23:40Z Enhanced biological phosphorus removal from wastewater in the tropics Cokro, Angel Anisa Stefan Wuertz School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering::Water treatment Enhanced Biological Phosphorus Removal (EBPR) is a phosphors (P) removal method that utilizes the capacity of Polyphosphate Accumulating Organisms (PAOs) to store P more than what is needed for growth. Conventionally, warm temperatures are thought to adversely affect EBPR, while presence of anaerobic stage with distinct separation of carbon and electron acceptors is considered fundamental for successful EBPR. However, recent findings have challenged these paradigms. This dissertation investigated EBPR at warm temperatures when carbon like volatile fatty acids (VFAs) and electron acceptors (e.g. nitrate and/or nitrite) were concomitantly present. Additionally, this thesis also explored a potential strategy to resuscitate failing EBPR systems at warm temperature via addition of wasted activated sludge (WAS). This dissertation showed that non-denitrifying PAOs (non-DPAOs), a group of PAOs that cannot use nitrate and/or nitrite as electron acceptors could carry out EBPR despite the simultaneous presence of carbon and nitrate/nitrite, potentially eliminated the needs for anaerobic stage. However, long term stability of anoxic/aerobic EBPR at warm temperature was influenced by proliferation of non-PAO organisms like certain types of Glycogen Accumulating Organisms (GAOs) or heterotrophic denitrifiers that could compete for carbon. Additionally, WAS addition showed promising potential to be developed as cheap alternative to resuscitate deteriorating EBPR systems. Doctor of Philosophy (CEE) 2018-08-03T05:16:01Z 2018-08-03T05:16:01Z 2018 Thesis Cokro, A. A. (2018). Enhanced biological phosphorus removal from wastewater in the tropics. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/75924 10.32657/10356/75924 en 199 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Water treatment Cokro, Angel Anisa Enhanced biological phosphorus removal from wastewater in the tropics |
| title | Enhanced biological phosphorus removal from wastewater in the tropics |
| title_full | Enhanced biological phosphorus removal from wastewater in the tropics |
| title_fullStr | Enhanced biological phosphorus removal from wastewater in the tropics |
| title_full_unstemmed | Enhanced biological phosphorus removal from wastewater in the tropics |
| title_short | Enhanced biological phosphorus removal from wastewater in the tropics |
| title_sort | enhanced biological phosphorus removal from wastewater in the tropics |
| topic | DRNTU::Engineering::Environmental engineering::Water treatment |
| url | http://hdl.handle.net/10356/75924 |
| work_keys_str_mv | AT cokroangelanisa enhancedbiologicalphosphorusremovalfromwastewaterinthetropics |