Biosink for CO2 generated in industry

 Implementation period

July 2023 – April 2024

Field of work

Digital technology

Resilient infrastructures




Project funded by the Ministry of Industry, Trade and Tourism of the Government of Spain and the European Union – Next Generation EU. Call for grants to support “Agrupaciones Empresariales Innovadoras” for the year 2023, within the framework of the Recovery, Transformation and Resilience Plan.
File number: AEI-010500-2023-184


CO2 removal is the key element to fight against the climate change. There is a global compromise to reduce these emissions, and this requires the development of new sustainable and economically viable technologies.
COZERO aims to develop a technology capable of removing CO2 from industrial emissions using a biological nitrification process. This process will use CO2 dissolved in water as a source of inorganic carbon by means of a bubble size that optimises the matter transfer from the gas into the liquid. This inorganic carbon-rich stream will be used by a bioreactor where the aerobic nitrification reaction will take place. Subsequently, a denitrification process is carried out in order to reuse most of the water required for the process. COZERO’s circular strategy close the nitrogen and water cycle, with a commitment to the development of an environmentally sustainable technology.


The main objective of the project is the removal of industrial CO2 by using a biological nitrification process, online monitored.
The development of this technology would enable companies to move towards a sustainable development model, meeting the objectives of ecological transition and decarbonisation set by the EU, as well as towards digital transformation, by offering a solution fully aligned with the principles of Industry 4.0. This technology implies a reduction in costs, which translates into an increase in competitiveness for companies, as currently, the emissions trading market is generating an increase in costs in the industry that directly affects the consumer.


Design, manufacturing, and piloting of a nitrification system with good dissolution of CO2 in water for its consumption as inorganic carbon, in order to remove this GHG pollutant from the atmosphere.