Chinese Researchers Develop Groundbreaking Method to Convert CO2 into High-Quality Protein

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A team of researchers from Xi’an Jiaotong University and the Tianjin Institute of Industrial Biotechnology in China has unveiled a revolutionary bioprocess that converts carbon dioxide (CO2) and electricity into single-cell protein (SCP). This innovative method not only addresses food security but also tackles environmental challenges related to greenhouse gas emissions.

The new process employs a dual-reactor system that combines anaerobic and aerobic stages. In the initial phase, microbial electrosynthesis converts CO2 into acetate, which is then utilized by aerobic bacteria to produce SCP in the second reactor. The results indicate a high efficiency level, yielding 17.4 g/L of biomass with an impressive protein concentration of 74%. This yield considerably surpasses traditional protein sources, such as fish meal and soybean, making it a valuable additive for both animal feed and potentially for human consumption.

This bioprocess presents significant environmental advantages over conventional protein production methods, which often involve costly pH adjustments and generate considerable wastewater. By minimizing these requirements, the new system promises a more sustainable food production model while recycling atmospheric carbon into nutritious protein.

As global demand for food rises—especially in light of climate change—this research stands to play a crucial role in promoting both food security and environmental stewardship. The findings from this study showcase how unused resources like CO2 can be transformed into essential food sources, aligning with global sustainability goals.

The study has been published in the journal Environmental Science and Ecotechnology and is seen as a potential stepping stone towards creating a circular carbon economy that can effectively reduce greenhouse gas emissions while meeting food production needs.

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