| Author | Ouyang Ming |
| Call Number | AIT Thesis no.EV-93-20 |
| Subject(s) | Sewage--Purification--Phosphate removal
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of
Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The effects of anaerobic conditions on biological phosphorus removal and sludge
settleability in anaerobic aerobic activated sludge process have been studied by both
continuous flow and batch experiments.
In the continuous flow experiments, ten systems with different anaerobic
configurations and various anaerobic retention time were operated. It has been observed that
the growth of some filamentous organisms was suppressed under three-compartment
anaerobic cascades as results of more soluble COD reduction and substrate gradient in
anaerobic zone. The systems with anaerobic cascades also showed good phosphorus removal.
It has been observed that anaerobic retention time should long enough to reduce soluble
COD to penetrate aerobic zone. Longer anaerobic retention time such as 3 and 5 hours
resulted in better phosphorus removal. In those systems without anaerobic cascade, severe
filamentous bulking took place, even though the anaerobic retention time were similar to
those of cascade systems.
In the batch experiment, effects of anaerobic retention time on phosphorus removal
was confirmed, suitable anaerobic retention time could achieve a better performance of
phosphorus removal. |
| Year | 1993 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Lee, Seong-Key; |
| Examination Committee(s) | Samorn Muttamara;Tanaka, Shuzo; |
| Scholarship Donor(s) | Royal Government of Denmark; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |