Chain elongation Anaerobic fermentation 1 Biocompatibility 1 CO2 valorization 1 Caproiciproducen 1 Caproiciproducens 1 Carboxylate platform 1 Carboxylation 1 Elongation 1 Extraction 1 Extractive chain elongation 1 Fermentation 1 Helianthus 1 Lachnospiraceae 1 Lactate 1 Lactobacillus 1 Linoleic acid 1 Liquid-liquid extraction 1 Liquid–liquid extraction 1 Medium-chain carboxylate 1 Medium-chain carboxylates 1 Microbiome 1 Microbiome engineering 1 Oleyl alcohol 1 Open culture 1 Propionic acid 1 RNA 1 Reactor microbiome 1 Reactor microbiomes 1 Solvents 1