| Author | Nazareth, Brenda L. |
| Call Number | AIT Thesis no.EV-90-11 |
| Subject(s) | Sewage--Purification--Biological treatment
|
| Note | A Thesis submitted in partial fulfillment of the requirements for t he degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The potential of incorporating immobilized cell to a
sequencing batch reactor for organic and nitrogen removal was
investigate d . Laboratory experiments we re conducted on
synthetic wastewater with COD concentrations of 800 mg/l, 400
mg /l a nd 200 mg/l . The entrapment method of cell immobilization
was employed using cellulose triacetate a nd activated sludge. 9
The effect of aeration period on carbon oxidation and
nitrogen removal was studied by employing 1 h, 6 h and 2 h
aeration time. The optimum aeration period was determined to be 2
hours. The COD removal efficiencies were observed to be above
90% in the three reactors. The degree of nitrification varied
from 1096 - 7096 in the three COD concentrations a t varying
aeration time, while the percent TKN that denitrified ranged from
596 -6 0%.
The effect of varying COD concentrations on nitrogen removal
was also investigated. The low loading reactor (COD=2 00 mg/l)
yielded 70% nitrification at the optimum aeration time of 2 h,
while the high loading reactor ( COD = 800 mg/l ) gave only 24 %.
The percent denitrification was highest ( 59% ) in medium loading
reactor (COD=400 mg/l) and lowest (23 96 ) at the high loading
reactor during the optimum aeration time of 2 h.
The yields of immobilized cell in the high , medium and low
loading reactors were determined to b e 0 . 164, 0.317, and 0 .46 g
cells/g COD consumed, r respectively; while the average suspended
solid s were 57, 38 and 14 mg/l, respectively . |
| Year | 1990 |
| 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) | Mino, Takashi
|
| Examination Committee(s) | Vigneswaran, Saravanamuthu ;Tran, Francis T.
|
| Scholarship Donor(s) | Denmark Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1990 |