| Author | Fuangfa Boonyarat |
| Call Number | AIT Thesis no.EV-93-11 |
| Subject(s) | Sewage--Purification--Nitrogen removal
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This study was carried out to study the nitrogen removal efficiency of anoxic-oxic
activated sludge processes. The theoretical analysis and numerical simulation were conducted and
compared with the data from wastewater treatment plants from published papers.
The key components of influent wastewater considered in the theoretical nitrogen removal
efficiencies are ammonia nitrogen, substrate for denitrification process, and alkalinity for
nitrification process. The theoretical results show that in the sufficient conditions of these
components the nitrogen removal efficiencies of : 1) anoxic and oxic system, depend on the return
sludge ratio from the final sedimentation tank and return mixed liquor, and 2) step-feed system,
depend on the return sludge ratio from the final sedimentation tank and the portion of influent to
the second anoxic tank.
The ammonia nitrogen and substrate in the influent and effluent from published papers of
anoxic-oxic activated sludge wastewater treatment plants have been reported . From the
theoretical analysis of these components for nitrogen removal efficiencies, generally the substrates
are enough to perform denitrification process. The results from the theoretical analysis of the
nitrogen removal efficiencies compare well with the data from published papers.
A mathematical model, which is able to simulate carbon oxidation with nitrification-denitrification
process, was used to simulate the data of wastewater treatment plants from
published papers. The simulation results indicated that the removal efficiency of total nitrogen can
consist with the published papers. |
| 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) | Fujii, Shigeo; |
| Examination Committee(s) | Lee, Seong-Key;Tanaka, Shuzo; |
| Scholarship Donor(s) | Electricity Generating Authority of Thailand (EGAT), Thailand; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |