Chowdhury, A. K. M. Moniruzzaman creator Tran, Francis T. Chairperson Chongrak Polprasert Examination Committee Harada, Hideki Examination Committee Canadian International Development Agency (CIDA) Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1990 continuing eng 96 p. A 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. 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, 1990 Sewage Purification Biological treatment Factory and trade waste Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B18343 http://203.159.5.9/ait-thesis/detail.php?q=B18343 150399 20260818171746.0