A falling film bioreactor (FFBR) for generating effective gas-to-liquid mass transfer using wavy laminar flow for continuous microbial gas processing

•Mass transfer device evaluated with paper biocatalyst support for gas processing.•Scalable falling film bioreactor with high gas fraction and small footprint.•Bioreactor capable of high gas-liquid mass transfer without gas sparging.•Gas absorption with less power and water input compared to traditional bioreactors.