Scientists at Nanyang Technological University, Singapore (NTU Singapore), have developed an innovative solar-powered method to transform sewage sludge into green hydrogen for clean energy and single-cell protein for animal feed. This addresses the challenges of managing waste and generating sustainable resources. The process involves three steps: mechanical breakdown of sludge, chemical treatment to remove heavy metals, and a solar-powered electrochemical process to convert organic materials into valuable products like acetic acid and hydrogen gas. Additionally, light-activated bacteria are used to convert nutrients into single-cell protein for animal feed. The method is highly efficient, recovering a high percentage of organic carbon and converting it into protein without harmful by-products. It achieves significant energy efficiency, producing hydrogen using sunlight more efficiently than traditional methods. The process also reduces carbon emissions and energy use drastically, while eliminating heavy metals from sludge. Although the method shows promise, further studies are required for scalability and addressing cost challenges associated with the electrochemical process and system design for wastewater treatment facilities.