Researchers at the Technical University of Munich have developed a new system that produces amino acids from carbon dioxide (CO2), hydrogen, and methanol using solar energy. These amino acids, which are the building blocks of proteins, are critically important for animal feed and laboratory-grown cultured meat. According to the researchers, the developed technology could significantly reduce dependence on agricultural protein sources like soy in the future.
Solar Energy First Converted to Methanol, Then to Amino Acids
The system developed by the researchers brings together different technologies in a single production chain. The process begins with the conversion of sunlight into electricity via photovoltaic (PV) panels. The electricity obtained is used to produce hydrogen through water electrolysis. This hydrogen is then combined with captured carbon dioxide to synthesize methanol. Methanol, in this context, serves only as an intermediate product. The most crucial part of the system involves special enzymes that convert methanol into amino acids through a series of biochemical reactions. The type of amino acid produced varies according to the enzyme combination used.
The research team demonstrated that a total of seven different amino acids can be produced using this method. These include glycine, serine, L-alanine, L-aspartic acid, L-valine, L-glutamic acid, and L-proline. All of these amino acids are among the fundamental building blocks that living organisms use for protein synthesis.
Offering an Alternative Protein Production Model to Plants
Today, most amino acids are obtained indirectly from agriculture. Plants use solar energy to create biomass, which is then used as animal feed or as a protein source in various industrial processes. However, this new method has created an alternative protein source. Researchers believe that this approach could lead to more efficient use of existing agricultural land in the long term and significantly reduce the environmental impact of amino acid production.
The Study Builds Upon Previously Developed Technology
In fact, this study is not a technology developed entirely from scratch. The same research group had previously succeeded in producing only L-alanine using green methanol in 2023. With this new work, the system has evolved from producing a single amino acid to a modular platform capable of producing various amino acids. Researchers believe that by changing the enzymes used, a much wider range of amino acids could be produced in the future. This indicates that the developed method could become a general production platform for various biological building blocks, not just for a single product.
Could Make a Significant Contribution to Animal Husbandry
According to the researchers, one of the most important application areas for this technology will be the animal husbandry sector. Dairy cows, especially those with high milk yields, are fed amino acid-rich feeds to sustain their production. Currently, millions of tons of amino acids are used for this purpose each year. However, the production of these amino acids consumes significant amounts of agricultural land, water, and natural resources. Soy production, widely used in animal feed, has long been criticized for its environmental impacts due to deforestation and high land use. Researchers believe that their developed method could reduce dependence on soy-based protein sources in the future.
Although the researchers have successfully operated the entire production chain, the developed technology is currently at a laboratory scale. The current production capacity is not yet sufficient for commercial use. The research team's next goal is to increase the production quantity by improving the efficiency of the enzymes that convert methanol into amino acids.
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