02502nam a2200265   450000500170000000800410001703500150005810000190007324500850009226000520017730000100022949000220023950001580026150200570041952013180047665000370179465000470183165000510187870000330192970000420196270000480200471000650205281000540211785600650217120260817173429.0110398         th                  eng    a.b101518011 aFai, Kong Ming10aComparison of activated sludge, trickling filter and anaerobic contact processes  aBangkok :bAsian Institute of Technology,c1976  a66 p.1 aThesis ;vno. 971  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of the Asian Institute of Technology, Bangkok, Thailand  aThesis (M.Sc.) - Asian Institute of Technology, 1976  aThe concept of solid retention time was applied in the activated sludge, trickling filter and anaerobic contact processes. A comparison  has been made based on the process performances such as COD removal efficiency, sludge production and SVI in the treatment of synthetic sucrose wastewater by the laboratory pilot plant. The SRT of the trickling filter has been evaluated and the design of  trickling filter based on bacterial performance was formulated. Several phenomena such as the variation of SRT by hydraulic loading at constant organic loading and the variation of observed half velocity coefficient, Ks by hydraulic loading were observed, With the foundation for trickling  filter based on bacterial performance, it was shown that an unifying formulation for the activated sludge, trickling filter and anaerobic contact  processes could be established,  Based on the results of this study, a selection of process for different types of treatment was made. As a partial treatment process, both trickling filter and anaerobic contact processes could possibly be used.  While high effluent quality was required, activated sludge process was shown to be pertinent to single secondary treatment. As a tertiary treatment process trickling filter process was found to be technically and  economically suitable. 0aSewagexPurificationxFiltration 0aSewagexPurificationxBiological treatment 0aSewagexPurificationxActivated sludge process1 aYang, Yi Ping, eChairperson1 aPescod, M.B., eExamination Committee1 aNguyen, Cong Thanh, eExamination Committee2 aThe Monsanto-HKSBP Education Foundation, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. 971  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B23823