How Shrimp Shells Are Being Turned Into 'Carbon Negative' Fuel, Food and Construction Materials

Engineers at Singapore's Nanyang Technological University, led by electrochemical engineer Li Hong, have developed a multistep chemical process that transforms shrimp shell waste into carbon-negative hydrogen gas, cultured protein for farmed seafood, and calcium carbonate for cement production—closing a waste-to-food loop while removing net atmospheric carbon dioxide.

This is a laboratory proof-of-concept; commercial viability and scalability remain to be demonstrated.