Mechanistic Description of Convective Gas–Liquid Mass Transfer in Biotrickling Filters Using CFD Modeling

Abstract

The gas-liquid mass transfer coefficient is a key parameter to the design and operation of biotrickling filters that governs the transport rate of contaminants and oxygen from the gas phase to the liquid phase where pollutant biodegradation occurs. Mass transfer coefficients are typically estimated via experimental procedures to produce empirical correlations, which are only valid for the bioreactor configuration and range of operational conditions under investigation. In this work, a new method for the estimation of the gas-liquid mass transfer coefficient in biotrickling filters is presented. This novel

Mathematical Modelling and CFD Simulation for Oxygen Removal in a Multi-Function Gas-Liquid Contactor

“…Many researchers studied the mathematical and CFD modelling of different masstransfer systems [14,31]. To our best knowledge, however, there is no research on the modelling of the HYSPEC degasser [32], which is crucial equipment in the sulfur production industry, in the literature.…”

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

“…Traditional VOC treatment methods mainly include physicochemical treatments (photocatalytic oxidation, low-temperature plasma, incineration, adsorption, etc.) and biological treatments. , However, the disadvantages on energy consumption, cost-effectiveness, and eco-friendliness may limit the application of physicochemical methods. ,, Biological treatments, including biofilters, , biotrickling filters, and bioscrubbers, have attracted much attention due to their low cost and environmental friendliness. ,, In particular, biotrickling filters (BTFs) have been widely used in the purification of odor gases such as VOCs, NO X , ammonia, and hydrogen sulfide. ,, …”

“…6,9,10 Biological treatments, including biofilters, 10,11 biotrickling filters, 7 and bioscrubbers, 12 have attracted much attention due to their low cost and environmental friendliness. 6,13,14 In particular, biotrickling filters (BTFs) have been widely used in the purification of odor gases such as VOCs, NO X , ammonia, and hydrogen sulfide. 7,15,16 However, the removal performance of hydrophobic VOCs by BTF is limited by the large mass transfer resistance and the low bioavailability and low biodegradability of hydrophobic VOCs.…”