| Author | Chan, Tik-yuen |
| Call Number | AIT Thesis no. EV-89-6 |
| Subject(s) | Sewage--Purification--Phenol removal
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of
Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Ethylene hollow fiber membranes of 0.2 µm pore size were used as direct
solid/liquid separation device in laboratory-scale aeration tanks for the
treatment of phenol, 2-chlorophenol, 2,4,6-trichlorophenol and pentachlorophenol.
Phenol-adapted sludge was used. The biodegradability of the chlorinated phenols
was dependent on the acclimation period and the chemical properties of the
compounds. 2-chlorophenol and 2,4,6-trichlorophenol were readily degraded after
13 days acclimation, while pentachlorophenol required an acclimation period of
20 days. The removal efficiency of the chlorophenols increased with a longer
adaptation period and higher volumetric organic loading.
Removal rate of phenol and 2-chlorophenol was much faster than
2,4,6- trichlorophenol and pentachlorophenol. Utilization rates of phenol and
2-chlorophenol (kg phenols/(kg MLSS.d)) were over 0.04 and 0.004 d -t respectively,
while that of 2,4,6-trichlorophenol and pentachlorophenol wer e around the range
of 2.2 x 10 -J d - 1
•
The direct membrane separation activated sludge system was shown to be
very stable against shock loadings due to a high MLSS concentration achieved by
membrane separation. Good effluent quality was attained as well, owing to the
membranes' ability to retain macromolecules from cell lysis. |
| Year | 1989 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Yamamoto, K.
|
| Examination Committee(s) | Ahn, Kyu-Hongn ;Tran, Francis T.
|
| Scholarship Donor(s) | The Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |