Okui, Hiroyuki creator Chongrak Polprasert Chairperson Mino, Takashi Examination Committee Zhuang, Ya-Hui Examination Committee Tokyu Co nstruct ion Company Ltd Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1991 continuing eng 86 p. Chemically enhanced primary treatment using ferric chloride in conjunction with cationic polymer (CAT-FLOC-CL) and anionic polymer (R-300) was tested for the treatment of AIT wastewater based on pilot-plant experiments. The appropriate dosages (ferric chloride = 40 mg/l, CAT-FLOC CL = 10 mg/l, R-300 = 1 mg/l) was determined by jar tests, considering the effect of each chemical on the charge neutralization. In pilot-plant experiments, maximum removal efficiencies of 71%, 57%, 65%, 78% for total COD, soluble COD, SS and total phosphate, respectively, were observed for the AIT wastewater. However, these removal efficiencies were affected by flowrate and influent characteristics. The dewater-ability of sludge produced was examined by the measurement of sludge resistance and capillary suction time. The better dewater-ability was obtainable by the chemical addition when compared to the conventional primary sludge. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1991 Sewage Purification Polymers and polymerization Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B17404 http://203.159.5.9/ait-thesis/detail.php?q=B17404 170399 20260817161632.0