Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems
Includes bibliography.
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Civil Engineering
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613154041659392 |
|---|---|
| access_status_str | Open Access |
| author | Casey, Timothy Gervase |
| author_browse | Casey, Timothy Gervase |
| author_facet | Casey, Timothy Gervase |
| author_sort | Casey, Timothy Gervase |
| collection | Thesis |
| description | Includes bibliography. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/8305 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:35.974Z |
| 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 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:11427/8305 Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems Casey, Timothy Gervase Civil Engineering Includes bibliography. A problem plaguing the greater proportion of nutrient removal activated sludge systems treating municipal sewage, is the prolific growth of :filamentous organisms (bulking), which inhibits the rate of sludge settling in the clarifier (secondary settling) stage of treatment and reduces plant throughput. To find the causes of :filament proliferation, a four-stage investigation was conducted: (1) A review of literature indicated that the promoted method for control of bulking in carbonaceous removal systems (the selector reactor) does not control bulking in nutrient removal systems. (2) From a laboratory-scale experimental programme it was concluded that low F /M filaments proliferate when sludge is subjected to alternating anoxic-aerobic conditions with nitrite present. (3) A review of the biochemistry of respiration led to the formulation of a biochemical model for facultative organism respiration, an important aspect of which is a series of mechanisms that give rise to inhibition of aerobic respiration following anoxic conditions. Inhibition of respiration was measured in activated sludge with aerobic batch test procedures. ( 4) Application of the biochemical model to filaments and floe-formers allowed the formulation of a biochemical/microbiological (bulking) model to describe the prolific growth of filamentous organisms. The model was tested and verified at laboratory-scale. 2014-10-11T11:57:41Z 2014-10-11T11:57:41Z 1993 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/8305 eng application/pdf Department of Civil Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Civil Engineering Casey, Timothy Gervase Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| thesis_degree_str | Doctoral |
| title | Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| title_full | Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| title_fullStr | Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| title_full_unstemmed | Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| title_short | Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems |
| title_sort | causes and control of low f m bulking in long sludge age nutrient removal activated sludge systems |
| topic | Civil Engineering |
| url | http://hdl.handle.net/11427/8305 |
| work_keys_str_mv | AT caseytimothygervase causesandcontroloflowfmbulkinginlongsludgeagenutrientremovalactivatedsludgesystems |