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035 _a.b10088283
099 9 _aAIT Thesis no. EV-89-6
100 1 _aChan, Tik-yuen
245 1 0 _aApplication of membrane separation to chlorinated phenols treatment
260 _aBangkok :
_bAsian Institute of Technology,
_c1989
300 _a85 p.
490 1 _aThesis ;
_vno. EV-89-6
500 _aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1989
520 _aEthylene hollow fiber membranes of 0.2 æm 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 {u2022} 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.
650 0 _aSewage
_xPurification
_xPhenol removal
700 1 _aYamamoto, K.,
_eChairperson
700 1 _aAhn, Kyu-Hong,
_eExamination Committee
700 1 _aTran, Francis T.,
_eExamination Committee
710 2 _aThe Government of Japan,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-89-6
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B17981
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