Shrimp Shells Turned into Carbon-Negative Hydrogen, Food, and Cement

Engineer Li Hong at Singapore's Nanyang Technological University has developed a process that transforms organic waste like shrimp shells into hydrogen gas, cultured protein, and calcium carbonate. The system uses electrolysis adapted for organic materials, powered by solar panels, and produces carbon-negative hydrogen. The protein can feed farmed shrimp, and the calcium carbonate can replace quarried limestone in cement. Two companies, including London-based Ki Hydrogen, are licensing the technology. The process is half as efficient as commercial green hydrogen but offers multiple revenue streams. Challenges include scaling up and economic viability.