| Author | Raghunandana, H. S. |
| Call Number | AIT Thesis no.EV-82-19 |
| Subject(s) | Sewage--Purification--Activated sludge process
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The oxygen transfer rate, KIa, at three liquid depth were determined by steady state, nonsteady state and direct analysis. The results from nonsteady state indicate that the transfer rate, KIa, does not vary greatly with depth. The oxygen transfer efficiencies were about 41 per meter from 4 m to 10 m lignin depth. The direct analysis at low air flow rate showed considerable fluctuation indicating non-uniform mixing. The batch activated sludge indicated higher COD removal efficiency at increased S/X ratio. The use of dissolved gas for solid separation by means of flotation was satisfactory upto 1900 rug/l of MLSS concentration. The batch process" demonstrated higher COD removal efficiency at higher S /X ratio. The continuous operation without cellular recycle showed high COD removal efficiency at a short sludge age of between 1-2 days. The biokinetic parameters were determined by the LAWRENCE and McCARTY (1970) model using synthetic waste. |
| Year | 1982 |
| 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) | Chongrak Polprasert ; Lohani, B.N. |
| Examination Committee(s) | Nguyen, Cong Thanh |
| Scholarship Donor(s) | Australian Government |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1982 |