Soon, algae might absorb carbon dioxide emissions before they even leave the factory

[Global] Researchers are always working on developing technologies to reduce carbon emissions to deal with the climate crisis. Recently, algae bioreactor technology has been highlighted as a way to convert carbon emissions from industries into biofuel and other useful by-products. But cost-effective methods for doing just this are needed to speed up the rate at which these new technologies are adopted.

Now, researchers at Pacific Northwest National Laboratory’s (PNNL) Marine Sciences Laboratory in Sequim, Washington, aim to lower the cost of producing algae-based biofuels to $3/gasoline-gallon equivalent by 2030 by cultivating highly productive strains of algae. The PNNL’s work on algal biofuels is funded and directed by the U.S. Department on Energy as part of the Algal DISCOVR project.

The algae technology eliminates challenges associated with existing carbon capture methods. Algae in the bioreactor use minimal resources: they depend solely on carbon emissions produced by industry and light to produce biofuel. Algae is thought to be 10-100 times more productive as compared to the non-food crops, such as switchgrass, used in current biofuel production. This means algae is capable taking up more carbon dioxide and producing more biofuel per acre, than these alternatives. Since they lack the tough fibrous structures of switchgrass and other plants, algae are also easier and cheaper to process. Other benefits of using algae for biofuel are that they don’t take up agricultural land and don’t require much water input.

Ideally, algal bioreactors could be installed in factories to capture the carbon dioxide as it is emitted. The company Hypergiant has already developed this type of reactor, which uses artificial intelligence to continually monitor and adjust airflow, the amount of light and carbon dioxide, temperature, and other parameters to maintain the optimal conditions for algae growth. There is hope for our future to be green, yet.


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