AI Article Synopsis
- The research investigates the recovery of biogas components (CO and CH) from synthetic anaerobic waste using PDMS hollow-fibre gas-liquid membrane contactors aimed at creating a more eco-friendly bioprocess.
- It examines how varying the gas-to-liquid (G/L) ratio impacts the efficiency of methane and carbon monoxide transport, finding that higher liquid flow favors methane while increased sweep gas flow enhances carbon monoxide recovery.
- The study suggests that under optimal conditions, methane recovery can reach up to 63%, and these separation trends remain consistent regardless of the size of the PDMS membrane module used.
Article Abstract
In this research, the recovery of dissolved biogas (CO/CH) from synthetic anaerobic effluents was studied using non-porous, polydimethylsiloxane (PDMS), hollow-fibre gas-liquid membrane contactors towards the design of a reduced carbon-footprint integrated bioprocess. As a key parameter, the gas-to-liquid (G/L) ratio (employing argon as sweep gas) was systematically varied in the range of 0.5-2.0. The results showed on a 1 m PDMS module that increasing the liquid (effluent) flow rate favours the CH transport, while a higher sweep gas flow rate is preferable for the CO transport over CH. Depending on the actual biogas composition and the CO content of the effluent, the methane recovery could be improved up to 63 % under steady-state conditions. In general, similar tendencies were observed when another PDMS membrane module with a smaller surface area (2 500 cm) was applied hence, in this sense, the separation behaviour seems to be independent of the membrane size.
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| http://dx.doi.org/10.1016/j.biortech.2022.128072 | DOI Listing |
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