HC-0B-05: Two-Phase Partitioning Bioreactors for Treatment of Volatile Hydrocarbons

Oxygen transfer in a three-phase bubble column using solid polymers as mass transfer vectors

“…Liquid solvents such as hexadecane, perfluorocarbons, polydimethylsiloxanes and silicone oil have commonly been used as mass transfer vectors (Muñoz et al, 2007;Quijano et al, 2009b;Darracq et al, 2010). These liquid vectors have been selected for their high affinity for oxygen and a variety of poorly water-soluble compounds but also for their relatively low viscosity making them relatively easy to disperse in aqueous phases and thus facilitating mass transfer (Quijano et al, 2017). More recently, solid polymers made of copolymers of polyurethane, vinyl acetate and/or ethylene, among others, have also been used in TPPBs.…”

Performance enhancement of biological methanation with trickle bed reactors by liquid flow modulation

“…They are characterized by an efficient control of pH, temperature, moisture content and pressure (Ullrich et al, 2018). In biotechnological TBR, also known as biotrickling filters, the source gases pass through a biofilm immobilized on a packed bed, which is normally continuously irrigated with a nutrient solution (Quijano, Miguel-Romera, Bonilla-Morte, & Figueroa-Gonzalez, 2017). The reaction gases are initially absorbed in the trickling aqueous solution and subsequently converted in the fixed biofilm.…”

“…However, recent studies are focusing on the periodic operation of TBRs (Liu & Mi, 2005). In general, TBRs operate under steady-state mode with constant feeding rates under a constant and often a low liquid flow rate (5-10 L m − ³ reactor volume min −1 ) (Quijano et al, 2017). Urseanu, Boelhouwer, Bosman, and Schroijen (2004) conclude that there is a poor interaction between the gas and the liquid.…”

“…This allows for independent control of the superficial gas velocity (Strübing et al., ). However, the presence of a continuous water layer over the biofilm often entails a limited abatement performance for hydrophobic gases as a result of their poor gas‐liquid mass transport (Quijano et al., ).…”