02015nas a2200253   450000500170000000800410001703500150005810000310007324500830010426000520018730000220023949000260026150001560028750200580044352008780050165000360137965000270141570000370144270000410147970000480152071000700156881000580163885600650169620260818095202.0271098s1981    th      r     000|  eng d  a.b102295901 aTanumiharja, Yani Indriani10aEffectiveness of plastic media in removing turbidity in horizontal flow filter  aBangkok :bAsian Institute of Technology,c1981  a35 leaves :bill.1 aThesis ;vno. EV-81-8  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1981  aA bench-scale horizontal filter was used to study the effectiveness of the plastic media as a filter media. The various parameters affecting  the filter performances were studied and the transport mechanism was investigated. Experiments were conducted by varying raw water turbidities  and flow rates. It was found that the plastic balls were efficient in removing suspended solids only in the range of 30 to 60%. The optimum flow rate for this removal of small particle of suspended solids was 1.5 m3/m2 h for the different levels of influent turbidities. For bigger particle size, the optimum flow rates were 0.5 m3/m2 h, 1.0 m3/m2 h and 1.5 m3/m2 h for  influent turbidity levels of 150 FTU, 100 FTU and 50 FTU, respectively. The predominant transport mechanisms in this study were hydrodynamic  action and gravity. The others mechanisms were not found to be significant 0aWaterxPurificationxFiltration 0aFilters and filtration1 aNguyen, Cong Thanh,eChairperson1 aWatanabe, Yoshimasa,eCo-Chairperson0 aChongrak Polprasert,eExamination Committee2 aGovernment of the Federal Republic of Germany,eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-81-8  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B21598