Breakthrough process converts CO2 and electricity into protein-rich food

The system employs two interconnected reactors to achieve this transformation. The first reactor uses microbial electrosynthesis (MES) to convert CO2 into acetate. The second reactor then utilizes aerobic bacteria, specifically *Alcaligenes*, to convert the acetate into SCP. Through continuous recirculation of the medium between these reactors, the researchers achieved a cell dry weight of 17.4 g/L and a protein content of 74%, exceeding the nutritional profiles of traditional protein sources like fish and soybean meal.

This process offers numerous advantages, including reduced pH adjustments, lower wastewater production, and mitigation of product inhibition. These factors contribute to a highly efficient and sustainable system. Furthermore, the SCP produced is rich in essential amino acids, making it an ideal supplement for animal feed and a promising option for human consumption.

The research highlights the potential of this technology to address global food security and climate challenges by converting greenhouse gases into valuable protein. With rising global food demands and the increasing urgency of combating climate change, this approach represents a crucial advancement toward a circular carbon economy. The system not only reduces environmental impact but also offers a scalable solution for sustainable food production.

Research Report:Single-Cell Protein Production from CO2 and Electricity with A Recirculating Anaerobic-Aerobic Bioprocess