A gas-liquid-solid inverse  uidization airlift bioreactor was proposed by combining advantages of external-loop airlift reactors and inverse  uidized beds. This airlift bioreactor comprises a gas-liquid riser, a gas separator, a liquid-solid inverse  uidized downcomer and a bottom connector. The effects of the gas velocity and the particle loading on the gas holdup in the riser and the liqui...

Abstract Based on the Euler-Euler-Lagrangian framework, Euler-Euler two-fluid model coupled with population balance (PBM) and Discrete Phase Model (DPM) were used to simulate gas-liquid-solid three phase dynamic behavior in laboratory bubble column. The non-Newtonian properties of liquid was considered numerical simulation, cases different models discussed. It is found that peak value velocity ...

Generally, unit operation processes that are used in environmental engineering are in‐ volved in interfacial reaction where mass transfer is an extremely essential component for system optimization. The purposes of this chapter were intended to provide the informa‐ tion of both theoretical model development and engineering practice for mass transfer of important processes in environmental engin...

In this work, a method to estimate solid elemental sulfur solubility in pure and gas mixtures using Monte Carlo (MC) molecular simulation is proposed. This method is based on Isobaric-Isothermal (NPT) ensemble and the Widom insertion technique for the gas phase and a continuum model for the solid phase. This method avoids the difficulty of having to deal with high rejection rates that are usual...

The hetght of an ovemll transfer unat has been evaluated m a gas-solid packed column at tnckle flow by measunng column performance during steady state adsorption expertments. Results have been anterpreted wtth an extmctton model mass transfer and axial dispersaon ua both phases Usmg Bodenstem numbers for the gas and solid phases from a previous investagation the hetght of a true transfer untt h...

there are several sources for pressure oscillations in solid propellant rocket motors. oscillatory flow field is one of them. free shear layers in motor flow field cause vortex shedding. end edges of propellant grains and baffle edge in two-segmented motors are samples of such zones. these vortices move from their forming points and strike the field walls. the kinetic energy of vortices change ...

A mathematical model for thermal explosion in a combustible dusty gas containing fuel droplets with general Arrhenius reaction-rate laws, convective and radiative heat losses, and interphase heat exchange between gas and inert solid particles is investigated. The objective of the study is to examine the effects of interphase heat exchange between the gas and solid particles on i ignition of rea...

The actions of nutrients on gut transit of liquids and solids have been extensively studied, but the effects of meal ingestion on intestinal gas flow are unexplored. We hypothesized that meals of varying caloric content and consistency modulate gas transit to different degrees. Nine healthy volunteers underwent jejunal perfusion of physiological gas mixtures at 12 ml.min(-1).3 h, with ingestion...

background: bisphenol a (bpa) is one of the hazardous materials causing disruption of endocrine pathways. due to water contamination by this component from multiple sources and the associated health problems, bpa has been the focus of multiple studies. it has been proved that bpa may cause harm because of its impact on estrogenic receptors in human and other organisms. methods: in this study, t...