Project Argonaut represents Planeteers’ next step towards industrial-scale carbon capture and storage. Planned at Hamburg’s gas processing plant, the project brings our engineered enhanced weathering technology into the city’s existing municipal and port infrastructure.

The installation is designed to use pure biogenic CO₂ separated during sewage-sludge gas processing at Hamburg Wasser, a stream that would otherwise be released into the atmosphere. Inside a controlled system, accelerated mineral weathering converts the CO₂ into dissolved bicarbonate for long-term storage in the aquatic environment. Planned on a floating pontoon on the Elbe, Project Argonaut’s initial nominal capacity will be 6,500 tons of CO₂ per year, with the option of further modular expansion.

The project is in development, with engineering, permitting, and site integration forming the next steps towards implementation.

Project Argonaut is designed to demonstrate how municipal infrastructure can become a platform for industrial-scale carbon removal. Building on Planeteers’ earlier deployments, it brings capture and storage together in one integrated system.

The project is intended to provide a reference for future installations at eligible biogenic CO₂ sources, translating controlled reactor performance into a repeatable deployment model. Measurable carbon accounting, site-specific environmental assessment, and integration into existing operations are central to this approach.

Monitoring, reporting and verification (MRV) are being developed around Isometric’s framework for biogenic carbon capture and storage and enhanced weathering in closed engineered systems.