Carbon dioxide bioconversion into single cell oils (lipids) in two reactors inoculated with Acetobacterium woodii and Rhodosporidium toruloides

Acetobacterium woodii was able to produce high concentrations of acetic acid, i.e., > 20 g/L, from CO2, in the presence H2 as an energy source, which favoured by maintaining a near-optimal pH 7.8 automated bioreactor. This allows mitigation CO2 emissions for their conversion then further used lipids (single cell oils) Rhodosporidium toruloides next assay. The yeast, grown on efficiently accumulated A. woodii’s medium, and improved bioconversion would result highly promising process. Acetic acid inhibitory studies performed with R. toruloides, at different initial using fermented broth showed that yeast maintained constant growth rate substrate consumption up 15 g/L. Both rates remained roughly higher concentrations; except more extended lag phase observed batch assays before entered its exponential phase.