‘Personal Carbon Sequestration’ Device Uses Algae To Remove CO2 From the Air

An anonymous reader quotes a report from Fast Company: In the future, your office might have an extra appliance next to the copy machine and the refrigerator: an algae bioreactor. Designed to fit inside offices and eventually sit on the rooftops throughout cities, it can capture as much carbon from the atmosphere as an acre of trees. And there’s an initial prototype already at work. Inside the bioreactor, algae does the work. “What’s amazing about algae is it’s really cheap and it’s easy to grow — the core things it needs are sunlight, CO2, and water,” says Ben Lamm, CEO and founder of Hypergiant Industries, an AI-focused tech company that developed a prototype of the device, called the Eos Bioreactor. Because algae grows much more quickly than trees, it can also sequester carbon more quickly; the company estimates that the device, which optimizes the algae’s ability to capture CO2, can sequester around two tons of carbon out of the air each year. The first version of the device, which is currently in operation, is three-by-three-by-seven feet. It’s a closed system that works indoors, connecting with an HVAC system to reduce CO2 levels inside and release cleaner air. The closed system also makes it possible for the team to study how algae grows — with sensors monitoring everything from light and heat and pH to the speed of growth and oxygen output — and how the system can be tweaked to work best in different conditions outside on rooftops. “With the first generation Eos, we have precise control of every aspect of the algae’s environment and life cycle,” he says. “It’s a photobioreactor, but it’s also an experimentation platform. We’ll be using this platform to better understand the environment that best suits biomass production under controlled circumstances, so that we can better understand how to design reactors for the variety of environmental conditions we’re going to encounter in the wild.” The team behind the device says they’re working on mobile apps that can monitor and run the bioreactors autonomously. It’s also “working on DIY plans that it will release next year so people can build the bioreactors at home,” the report mentions.