| Author | Nguyen Thi Ngoc Tran |
| Call Number | AIT Thesis no.EV-04-16 |
| Subject(s) | Sewage--Purification--Nitrogen removal
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-04-16 |
| Abstract | Research on a novel process in which ammonium is converted to dinitrogen gas
under anoxic conditions with nitrite as the electron acceptor is carried out. Anaerobic
ammonium oxidation (Anammox) process is studied in the fluidized bed reactor with
NH4N and N02N as feed. The reactor was initiated with seed sludge from
nitrifying/denitrifying fluidized bed reactor. The startup process lasted for 42 days. NH4N
and N02N concentration was increased from 100 mg/I to 300 mg/I, and loading was
changed from 0.218 to 0.638 kg NH4N/m3reactor·d and from 0.22 to 0.637 kg
N02N/m3reactor·d during the startup. Upflow velocity was maintained at 3 m/h during the
startup. By the end of sta1tup, NH4N and N02N conversion of 74.77% and 77.07% were
obtained.
During process operation, influent NH4N and N02N concentration was increased in
steps from 100 mg/I to 300 mg/I. Upflow velocity was maintained at 3.17 m/h. According
loading rate was varied from 0.288 kg NH4N/m3reactor·d and 0.332 kg N02N/m3reactor·d to
0.874 kg NH4N/m3reactor·d and 0.878 kg N02N/m3reactor·d. NH4N and N02N removal was
obtained as 87% to 95%. Gas generation was observed as 3.453 lid at 0.874 kg
NH4N/m3reactor·d loading rate which was 56% of theoretical yield. N2 composition was
observed to be from 98% to 99 % of total biogas volume. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-04-16 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Annachhatre, Ajit P. |
| Examination Committee(s) | Preeda Parkpian;Satoh, Hiroyasu |
| Scholarship Donor(s) | AIT Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2004 |