A carbon-dioxide-storage system based on bacteria is the goal of CO2SolStock, a three-year project funded by the EC.
The project, which was initiated by Belgian company BIOMIM Greenloop, includes academic partners from TU Delft in
In their natural environment, certain bacteria are able to absorb CO2 from the air and bind it to calcium. This triggers precipitation consisting of lime deposits (calcium carbonates).
It is claimed that using bacteria for CO2 storage imposes fewer risks than the traditional techniques because CO2 is stored as a solid substance instead of gas. The researchers behind CO2SolStock also claim that CO2 drawn from the air can be used as a source of carbon. It is believed that this eliminates the normal energy-intensive processes required for CO2 concentration.
Beyond CO2 storage, this technique is also being considered for biocementation. The research team believes that it could be used, for example, in the consolidation of sand bodies. It is hoped that industrial processes that require CO2 and/or calcium may also be able to use the technology.