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Integration of gas enhanced oil recovery in multiphase fermentations for the microbial production of fuels and chemicals

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Show simple item record Pedraza-de la Cuesta, Susana Keijzers, Lore van der Wielen, Luuk A.M. Cuellar, Maria C. 2018-03-08T16:25:06Z 2018-03-08T16:25:06Z 2018
dc.description peer-reviewed en_US
dc.description.abstract In multiphase fermentations where the product forms a second liquid phase or where solvents are added for product extraction, turbulent conditions disperse the oil phase as droplets. Surface-active components (SACs) present in the fermentation broth can stabilize the product droplets thus forming an emulsion. Breaking this emulsion increases process complexity and consequently the production cost. In previous works, it has been proposed to promote demulsification of oil/supernatant emulsions in an off-line batch bubble column operating at low gas flow rate. The aim of this study is to test the performance of this recovery method integrated to a fermentation, allowing for continuous removal of the oil phase. A 500mL bubble column is successfully integrated with a 2 L reactor during 24 h without affecting cell growth or cell viability. However, higher levels of surfactants and emulsion stability are measured in the integrated system compared to a base case, reducing its capacity for oil recovery. This is related to release of SACs due to cellular stress when circulating through the recovery column. Therefore, it is concluded that the gas bubble-induced oil recovery method allows for oil separation and cell recycling without compromising fermentation performance; however, tuning of the column parameters considering increased levels of SACs due to cellular stress is required for improving oil recovery. en_US
dc.language.iso eng en_US
dc.publisher Wiley and Sons Ltd en_US
dc.relation.ispartofseries Biotechnology Journal;1700478
dc.subject emulsion en_US
dc.subject fermentation en_US
dc.subject integration en_US
dc.subject microbial biofuels en_US
dc.subject product recovery en_US
dc.title Integration of gas enhanced oil recovery in multiphase fermentations for the microbial production of fuels and chemicals en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1002/biot.201700478
dc.contributor.sponsor Dutch Ministry of Economic Affairs en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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