Volatile and medium chain fatty acid production from cabbage residues using mixed culture fermentations and in-situ product removal by electrodialysis

Hetero‐Coupling of Bio‐Based Medium‐Chain Carboxylic Acids by Kolbe Electrolysis Enables High Fuel Yield and Efficiency

“…Specifically, the Kolbe electrolysis enables the upgrading of n ‐CA mixtures, originated from microbial conversions of a variety of substrates such as corn beer, [13] acid whey, [12] or other organic waste streams[ 30 , 31 , 32 ] to fuels or fuel additives. In general, the combination of microbial and electrochemical conversion in electrobiorefineries offers the potential to make an important contribution to a circular and bio‐based but also viable economy.…”

Model-aided targeted volatile fatty acid production from food waste using a defined co-culture microbial community

“…VFAs including caproate, valerate, butyrate, propionate and acetate were detected by Gas Chromatography and the concentrations of glucose, fructose and lactate were determined by high-performance liquid chromatography, as described previously by Selder et al (2021). The optical density (OD) was measured with a spectrophotometer (Shimadzu UV-1201 & UV-Vis, Australia) at wavelength 630 nm.…”

“…In the enzymatic hydrolysis, all parts of the cabbage were utilized. Hydrolysis was performed as previously described by Selder et al (2021). The composition for cabbage hydrolysate (Cab1 medium) is 17.6 ± 0.1 g L −1 of fructose and 27.8 ± 0.1 g L −1 of glucose with a dry matter content of 6.6 ± 0.03 %.…”

“…Instead of adding extra glucose or fructose to increase their concentration in the waste stream, the total sugar concentration was kept constant while the glucose to fructose ratio was modified. The medium was changed from Cab1 to Cab2 (Section 2.1), since in parallel with the development of the model, the production process itself was optimized by Selder et al (2021). Due to the change in glucose and fructose concentrations, the ratio between glucose and fructose initial concentration was assumed to be 1.0 in all in silico experiments.…”