Tag: CO2

Efforts are underway to remove CO2 from seawater. Shipping is currently responsible for around 3% of greenhouse gas emissions - a figure that is on the rise. For our planet every reduction counts. Which explains why a female-led startup from London has developed a system that removes up to 95% of the carbon dioxide generated by a ship’s engine....

Sustainable food can be conjured out of thin air. Now a Hamburg-based startup has used CO2 to manufacture oil alternatives. CO2 is placed in a bioreactor with different bacteria and converted into oil. Using yeast makes the oil suitable for cosmetic or cleaning products; oxyhydrogen bacteria, meanwhile, means it can be used for sustainable aviation fuel (SAF), lubricant or...

Recycling rare earths, which are vital for electronic components, is critical. Carbon dioxide is reusable, too, and can generate sustainable electricity - just like in hydroelectric plants. In their test facility, a research team in Texas exchanged water for supercritical CO2. Above a temperature of 31℃ and pressure of 74 bar, sCO2 resembles a gas, but acts more like...

Recycled glass is saving beaches from erosion; while a remote-controlled buoy could rescue those in peril at sea. Seaweed’s high CO2 uptake means that it is contributing significantly to climate rescue. Still, Sargassum, a brown algae that spreads rapidly (see the 5,000 mile long slick in the Atlantic) has unwanted side effects. It deprives marine life of vital light...

A toilet break on Mars could be a constructive use of astronauts’ time. And it isn’t just human urine that’s suitable as building material. Algae, already used to make blue lemonade, are showing their versatility here too. The founders of a US startup licensed a proprietary process from their former University in Colorado, harnessing microalgae to develop ersatz cement....

Edible cups are great for coffee fans and help reduce waste. But what about the 10 billion kg of coffee grounds that are discarded each year? Well, Australian engineers took a shot at concrete to create a powerful mix. By heating the grounds at 350℃ in an oxygen-free room, they first produced biochar. This was used to replace 15%...

Filters can rid water of pollutants directly at the source. Now, an LA-based startup is aiming to remove CO2 from seawater. Why? The world’s oceans store around 30% of annual CO2 emissions and can absorb 150 times more of the gas than air. But as coral death shows, the situation is far from ideal. The new process sees carbon...

A natural film keeps food fresh for longer and reduces waste. Now, a startup from San Francisco has developed a private home service-system which converts food waste into nutrient-rich chicken feed. Using an electrically-operated steel container with a charcoal odour filter, kitchen scraps are dried overnight. Once the bin is full after a few weeks, users decant it into...