02413nas a2200253 i 450000500170000000800410001703500150005810000370007324501120011026000520022230000100027449000260028450001570031050200580046752012330052565000470175865000280180570000360183370000480186970000440191771000750196181000580203685600650209420260818171746.0150399s1990    th  u m rtt   0|  a1eng d  a.b104987221 aChowdhury, A. K. M. Moniruzzaman10aPetroleum waste biodegradation with porous biomass support system (PBSS) on a rotating biological contactor  aBangkok :bAsian Institute of Technology,c1990  a96 p.1 aThesis ;vno. EV-90-3  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, 1990  aA laboratory scale study was conducted to find the feasibility of the  n ew coupling of Rotating Biological Contactor (RBC) plus Porous Biomass Support  System (PBSS) using polyurethane foam as porous support media to biodegrade  petroleum refinery wastewater. Polyurethane foam was attached on disks of  two four-stage laboratory scale cascade connected RBC units.  The two RBC units were operated simultaneously at different but constant,  flowrates giving hydraulic loading rates of .01. .02, .03, .04 m3/m2/ d in two  runs keeping the same rotational speed throughout. Organic loading was a  less controllable factor in t his study.  For all of the hydraulic loadings, it was found that the removal efficiency  of total chemical oxygen demand (TCOD) and Oil were above 80 percent.  Ammonia nitrogen removal were above 90 percent and for Phenol it was found  above 85 percent. Two kinetics of ammonia nitrogen removal ( Monod and  Caperon- Meyer kinetics ) fit well with the experimental data . Throughout  the study, t he biomass concentration within the polyurethane foam was  investigated.  The results show that this new technology can be applied effectively  for practical purposes with moderate hydraulic loading rates. 0aSewagexPurificationxBiological treatment 0aFactory and trade waste1 aTran, Francis T., eChairperson0 aChongrak Polprasert,eExamination Committee1 aHarada, Hideki, eExamination Committee2 aCanadian International  Development Agency (CIDA), eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-90-3  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B18343