The Advanced Research Projects Agency - Energy (ARPA-E) is offering a funding opportunity titled "Realize Energy-rich Compound Opportunities Valorizing Extraction from Refuse waters (RECOVER)" aimed at developing technologies to recover high-value energy materials from aqueous waste streams. The program seeks to concentrate and recover materials such as ammonia and critical metals from various waste sources, including municipal wastewater and oil and gas flowback, with the goal of enhancing U.S. energy security and significantly reducing energy demand and greenhouse gas emissions. With an estimated total program funding of $36 million, ARPA-E plans to award between $1.5 million and $4 million to approximately 16 projects, and interested applicants must submit their proposals through the ARPA-E eXCHANGE platform by December 31, 2024, at 9:30 a.m. Eastern Time. For further inquiries, applicants can contact ARPA-E at arpa-e-co@hq.doe.gov.