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Biodesulfurization of Light Fuel Oil

, M.Sc. Thesis Sharif University of Technology Najafi, Helya (Author) ; Farhadi, Fatollah (Supervisor) ; Molaei, Asghar (Supervisor) ; Arabeyan, Daruosh (Co-Advisor)

Abstract

Biological removal of sulfur compounds from petroleum is one of the major attractions of environmental technologies in the oil industry. Inefficient sulfur removal in refining processes causes sulfur oxides (SOx) production after combustion, which has adverse effects on the environment.Today the most common way to remove sulfur from crude oil is Hydrodesulfurization which has poor performance in removing some heterocyclic compounds such as thiophenes. Increase the amount of sulfur in the remaining oil reserves and the other hand, more stringent environmental regulations, has led researchers to development and invent new methods for desulfurization. Biological desulfurization is one of these...

Optimization of Membrane Structure in Membrane Bio-Reactor Application

, M.Sc. Thesis Sharif University of Technology Khosravizade, Rouhollah (Author) ; Mousavi, Abbas (Supervisor) ; Bastani, Daruosh (Co-Advisor)

Abstract

Reusing valuable materials such as water is one of the ways to achieve sustainable development. Membrane bioreactor technology (MBR) is one of the ways to reuse water and this is an alternative to another way to upgrade existing refinery.Structure and porosity of the membranes used in MBR Systems, porosity distribution, Hydrophilic or hydrophobicity of the membrane and surface roughness are very important Parameters that impact the ultimate performance of membrane bioreactor. Hence, this project focuses on optimization membrane structure to purification a specific type of wastewater. So amount of polymer and nanoparticle membrane for MBR systems should determined by experiment design.In this...

Drug Delivery into the Anterior Segment of the Eye

, M.Sc. Thesis Sharif University of Technology Alavi Shoushtari, Navid (Author) ; Abdekhodaie, Mohammad Jafar (Supervisor) ; Bastani, Daruosh (Supervisor)

Abstract

Transport phenomena i.e. momentum, heat and mass transfer are occurring inside the eye constantly. Any disturbance in each of these could lead to diseases or ocular problems. Konwledge of transport phenomena can help surgeons and specialists to identify problems more easily and cure the problems effectively. Further more, these phenomena have a great impact on drug delivery inside the eye. Therefore deep understanding of them makes investigation of different therapies easy and convenient. Consequently this understanding could lead to choose the best method and route of administration available. A precise model which is in consistence with the real human eye has been developed and the ocular...