Chan, Tik-yuen creator Yamamoto, K. Chairperson Ahn, Kyu-Hong Examination Committee Tran, Francis T. Examination Committee The Government of Japan Scholarship Donor text th Bangkok Asian Institute of Technology 1989 monographic eng 85 p. Ethylene 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. A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1989 Sewage Purification Phenol removal Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B17981 http://203.159.5.9/ait-thesis/detail.php?q=B17981 120399 20260817162918.0