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Evaluation of structural properties of cylindrical packed beds using numerical simulations and tomographic experiments
(De Gruyter, 2009-12-01)
This contribution is focused on the analysis of the structure of packed beds of spherical particles at relatively low aspect ratios (i.e., particle to tube diameter ratio) as those arising in multitubular fixed bed reactors. ...
An algorithm to simulate packing structure in cylindrical containers
(Elsevier Science, 2005-10)
The aim of this work is to propose an algorithm to simulate the packed bed structure of mono-sized spheres in cylindrical containers. The approach employed is called soft spheres algorithm, because it allows some degree ...
Characterization of packed-bed in the downcomer of a concentric internal-loop airlift bioreactor
(2022-04-01)
A packed-bed basket containing corn cob powder was used for the adaptation of a concentric-tube airlift reactor for enzymatic reactions. The bed was inserted in the downcomer region of the bioreactor generating a decrease ...
Improving enzyme production by solid-state cultivation in packed-bed bioreactors by changing bed porosity and airflow distribution
(2021-03-01)
Enzymes production by solid-state cultivation in packed-bed bioreactor needs to be improved by mathematical modeling and also by experimentation. In this work, a mixture of sugarcane bagasse and wheat bran was used for the ...
Heat transfer in packed-beds of agricultural waste with low rates of air flow applicable to solid-state fermentation
(2018-10-12)
Heat transfer studies were carried out in packed-beds (PBs) heated by the wall and percolated by low air flow rates. Porous media were composed by particles of sugarcane bagasse (SCB) and by a mixture of particles of SCB, ...
Estimation of the radial distribution of axial velocities in fixed beds of spherical packing
(Institution of Chemical Engineers, 2019-07-24)
The vessel wall of densely packed beds exert a strong influence on particle distribution that generates a radial porosity profile and, in turn, a radial profile of axial velocity. A direct consequence is the appearance of ...
The effect of biomass immobilization support material and bed porosity on hydrogen production in an upflow anaerobic packed-bed bioreactor
(2013)
The aim of this study was to investigate the effect of the support material used for biomass attachment and bed porosity on the potential generation of hydrogen gas in an anaerobic bioreactor treating low-strength wastewater. ...
Hydrogen production from soft-drink wastewater in an upflow anaerobic packed-bed reactor
(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
The production of hydrogen from soft-drink wastewater in two upflow anaerobic packed-bed reactors was evaluated. The results show that soft-drink wastewater is a good source for hydrogen generation. Data from both reactors ...
Optimization of inulinase production by solid-state fermentation in a packed-bed bioreactor
(John Wiley & Sons LtdChichesterInglaterra, 2010)
Solid-liquid extraction of cellulases from fungal solid-state cultivation in a packed bed bioreactor
(2020-09-01)
Cellulases are enzymes required for the production of second-generation ethanol (E2G) via biochemical route. The current paper reports the development of an apparatus for solid-liquid extraction of cellulases from solid-state ...