The hydrodynamic studies of fluidized bed reactor has been reported in terms of pressure drop, minimum fluidization velocity and bed volume expansion to contribute to the optimization of the CNTs production parameters in fluidized bed reactors. Minimum fluidization velocity and pressure drop, as the most important parameters, were taken into account for the investigation of the hydrodynamic beh...

Product inhibition of cellulolytic enzymes affects the efficiency of the biocatalytic conversion of lignocellulosic biomass to ethanol and other valuable products. New strategies that focus on reactor designs encompassing product removal, notably glucose removal, during enzymatic cellulose conversion are required for alleviation of glucose product inhibition. Supported by numerous calculations ...

We describe early results from the Center for Exascale Simulation of Advanced Reactors (CESAR). These flow naturally from our project plan to evolve existing petascale codes to exascale, couple them in order to provide accurate multiphysics simulations of advanced nuclear reactor designs, and carry out code development in a codesign environment that incorporates computer vendors and system soft...

( Asymmetric cellulose acetate membranes have been prepared and characterized in the laboratory with a view to use them in membrane bio-reactors. Enzymatic hydrolysis of sucrose has been investigated in a dead-end stirred cell type membrane bio-reactor using these membranes. Effect of different operating variables such as substrate concentration, enzyme loading, flow rate and working volume hav...

In wastewater treatment plants, nitrifying systems are usually operated with elevated levels of aeration to avoid nitrification failures. This approach contributes significantly to operational costs and the carbon footprint of nitrifying wastewater treatment processes. In this study, we tested the effect of aeration rate on nitrification by correlating ammonia oxidation rates with the structure...

The use of a film-flow reactor for studying the kinetics of substrate removal is described. The reactor provides a means of maintaining a uniform layer of biologically active slime which is stationary while the feed solution is made to flow over the slime surface in a thin film. The study was designed to evaluate process limitations in the trickling filter process which is designed for the biol...