Succinic acid production and CO2 fixation using a metabolically engineered Escherichia coli in a bioreactor equipped with a self-inducing agitator

► A reactor equipped with a self-inducing agitator was used to recycle CO2 for succinic acid production. ► The self-inducing agitator reduced CO2 waste. ► At pH 6.3 less CO2 was required but succinate production was not affected. ► This process was coupled with ethanol fermentation to reduce CO2 emission.