| Author | Cheung, Chok-po |
| Call Number | AIT Thesis no. EV-80-7 |
| Subject(s) | Sewage--Purification--Activated sludge process
|
| 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 |
| Abstract | A batch feed, cyclical pressure reactor has been designed for
this study as a laboratory unit to simulate the deep shaft activated sludge process. The cyclical pressure of the system was operated from zero to its maximum of 75 psig. This generates a dissolved oxy
gen of 17.9 to 27.6 mg/t under the cycle time of two minute and eleven seconds (i.e. 38" + 76" + 17"). The system is capable of removing 87.42 to 94.6% COD, 94.6 to 97.65% BOD5 (20°C), 27.09 to 72.9% NH3-N, and 12.96 to 14.28% total filtrable orthophosphate(T-P04). The oxygen up-take rates for MLVSS
are 12.66-18.72 mg/g-h. The sludge produced from the system has a SVI of 44 to 71 mg/t and no bulking has been experienced during the
operation. The dewatering specific resistance of the sludge was found to be 1.78 x 108 to 2.47 x 108 s2/g. Eleven common bacteria genera were isolated from the slud3e of the reactor, stalk and free swimming protozoa were also observed in
the sludge. |
| Year | 1980 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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) | Lohani, Bindu N. ; Nguyen, Cong Thanh
|
| Examination Committee(s) | Chongrak Polprasert
|
| Scholarship Donor(s) | Royal Thai Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1980 |