DOE Funds Protein Evolution for Polyester Recycling

The U.S. Department of Energy (DOE) has awarded $3 million in funding to Protein Evolution, a biotechnology company, to accelerate the development of enzymes capable of breaking down polyester textiles. This initiative aims to make the recycling of PET (polyethylene terephthalate) textiles more cost-competitive and scalable. The project involves a collaboration between Protein Evolution, the chemical manufacturing company Xytel, and a national laboratory, which will contribute its expertise and infrastructure to the research and development process. The goal is to engineer enzymes that can efficiently depolymerize polyester waste into its constituent monomers, which can then be used to create new, high-quality polyester products. This circular approach contrasts with traditional mechanical recycling methods, which often result in downcycled materials with reduced performance. Protein Evolution's proprietary enzyme engineering platform is central to this effort, enabling the design of enzymes with enhanced stability, activity, and specificity for polyester substrates. The company has previously demonstrated success in developing enzymes for other industrial applications, leveraging its deep understanding of protein science and directed evolution techniques. The partnership with Xytel is expected to provide crucial insights into the industrial-scale production and integration of these enzymes into existing chemical recycling processes. The involvement of a national laboratory, though not explicitly named in the initial announcement, suggests access to advanced analytical tools, pilot-scale facilities, and specialized scientific knowledge that can de-risk and accelerate the technology's path to commercialization. The DOE's investment underscores a growing federal commitment to supporting innovative solutions for plastic waste management and the transition to a circular economy. This funding is part of a broader DOE strategy to foster breakthroughs in materials science and sustainable manufacturing, aiming to reduce reliance on virgin fossil fuels for plastic production and mitigate the environmental impact of textile waste. The project is anticipated to contribute to the development of a more sustainable and resilient textile industry by providing a viable alternative to landfilling and incineration of polyester garments and other PET-based materials. Successful implementation could lead to significant reductions in greenhouse gas emissions associated with polyester production and waste disposal, aligning with national climate goals. The $3 million grant will support several years of research and development, including enzyme optimization, process scale-up, and techno-economic analysis to validate the commercial viability of the technology. Protein Evolution's work in this area is positioned to address a critical bottleneck in the textile supply chain, where a substantial portion of waste is currently difficult to recycle effectively.