The Advanced Research Projects Agency - Energy (ARPA-E) is offering a funding opportunity titled "Realize Energy-rich Compound Opportunities Valorizing Extraction from Refuse waters (SBIR/STTR)" aimed at small businesses. This initiative seeks to develop innovative technologies for concentrating and recovering high-value energy materials, such as ammonia and critical metals, from aqueous waste streams, thereby enhancing U.S. energy security and reducing greenhouse gas emissions. The program is significant as it addresses the need for sustainable recovery methods that can replace imports of these materials while also lowering energy demand. Interested applicants can apply for funding ranging from $1.5 million to $4 million, with a total estimated program funding of $36 million and an expected 16 awards. The application deadline is December 31, 2024, and further details can be found on the ARPA-E eXCHANGE website or by contacting ARPA-E CO at arpa-e-co@hq.doe.gov.