| Author | Sakonwan Chanphaka |
| Call Number | AIT Thesis no.EV-96-32 |
| Subject(s) | Sewage--Purification--Activated sludge process
|
| Note | A thesis submitted in partial fulfillment of requirements for the degree of
Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The study of acidogenesis of waste activated sludge was carried out using 4-lab-scale
complete mixing reactors in the batch operation. The objectives was to evaluate the
performance of pretreatment by autoclave, the effects of sludge renewal ratio and batch
operation time. The reactors were fed with autoclaved sludge at 20%, 30% and 40% renewal
ratios and the control reactor was fed with raw sludge at 30% renewal ratio. The batch
operations were carried out at 2-day, I-day and 0.5-day intervals. The results showed better
degradation of autoclaved sludge and highest VF A production at 40% renewal ratio for each
reaction time and 0.5-day reaction time for each renewal ratio.
For each type of VFA produced, optimum acetic acid production was also found to be
40% renewal ratio at 0.5-day reaction time. Propionic acid production was found highest in
20% renewal for each reaction time and 2-day reaction time for each renewal ratio. But the
production of isobutyric acid and butyric acid which were of minority could not be optimized
because the concentrations produced did not differ much in each reactor. |
| Year | 1996 |
| 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 (EV) |
| Chairperson(s) | Yang, Byung-Soo; |
| Examination Committee(s) | Samorn Muttamara;Kamei, Tasuku; |
| Scholarship Donor(s) | Government of The United Kingdom; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1996 |