Microalgae-based application

Algae-based carbon capture is a technological option for CO2 conversion offered by Danieli.

 

Through this chemical process that biomimics the natural process of photosynthesis, microalgae convert light energy and carbon dioxide into natural molecules.

 

One such solution is in operation at Acciaierie Bertoli Safau (ABS), Italy, our steelmaking division.
The chemical treatment system installed at ABS allows both thermal-waste recovery from steelmaking processes and the use of the CO2 byproducts for chlorophyll photosynthesis.

It consists of a series of high-productivity photobioreactors that yield the high-quality product, which is expected to supply a growing market demand. These reactors take advantage of sunlight during the day and LEDs that emit radiation of the desired wavelength at night.

 

Thanks to the high level of industrial automation only a minimal number of personnel is required to operate the system.

Countries with the most sunshine, and where the air temperature remains above zero (°C) are ideal for growing and using algae, to avoid building a greenhouse to cover the bioreactors.

Danieli offers full support to its customers from assistance in plant size and reactor-type selection, microalgae species, commissioning and training to commercial support for the sale of finished products.

 

We turn carbon dioxide into a valuable resource.

 Benefits:

• CO2 biological sequestration (microalgae are 30 times more efficient than trees)
• Energy recovery from thermal losses
• Modular technology
• Easy and simple installation
• Production of high economic-value microalgae;
• Return of investment (ROI) < 5 years

For a 1000 m² microalgae plant and a reheating furnace of 500 kton/y:

•  Biological sequestration of more than 30 tons of CO2 p.a.
• Waste heat recovery
• Energy recovery from furnace thermal losses of about 5 kWh/ton of steel with consequent CO2 reduction of 450 t/y