A Liu, Qishan creator Ha, Sung-Ryong Chairperson Eckhardt, Ing. Heinz Examination committee Takizawa, Satoshi Examination committee Asian Institute of Technology Scholarship donor text th Bangkok Asian Institute of Technology 1998 monographic eng 54, A15, B6, C7, D1 leaves Treatibility of phenol and 2,4-DCP by BAC-SBR and SBR system were studied in six reactors using synthetic wastewater. Phenol and 2,4-DCP were fed to the reactors as only carbon sources and the influent concentration was varied according to the experimental objectives. Totally 5 runs (3 phases) of experiments were conducted. Different reaction time and sludge retention time was used in different Run. When the influent concentration of 116 mg/L of phenol and 100 mg/L of2,4-DCP was used, both BAC-SBR and SBR systems reach 90% .of COD and 99% of total phenol removal except for SBRI with SRT of 3 days. BAC-SBR system shows lower effluent COD and phenol at beginning of the operation than SBR system and stable effluent throughout the operation. When the influent concentration of 2,4-DCP was increased to 200 mg/L, its toxic effect to reactor performance was checked. The BAC-SBR system shows high tolerance ability than SBR system. In the last Run, the influent concentration of 162 mg/L of phenol and 140 mg/L of 2,4- DCP was used. The effluent COD and phenol from BAC-SBR system is lower than from SBR system with same SRT. Short sludge retention time gives high effluent. Based on the data obtained, a mathematical model was used to simulate the reactor performance. Some empirical constants such as a, p, y were calculated as 1.031 , 2.225 and 1.1764 respectively. The model can be used to predict the performance of the BAC-SBR system. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1998 Sewage Purification Phenol removal Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B12735 http://203.159.5.9/ait-thesis/detail.php?q=B12735 301198 20260818223103.0