When fish farms kill their fish for food some of that food is ground up and fed to other fish as nutrient pellets. It’s well known that current fishing practices are really bad for the environment and that fish farms aren’t good for their local environment. Anything we can do to help reduce the damage done by fish (and eating fish) will make this world a little better.
A new company, NovoNutrients, has created a solution to the fish feed problem by addressing another global issue: too much carbon. The company has a process which takes carbon from factories and feeds it to microbes, which in turn grow to become fish food.
The startup’s process uses carbon dioxide, along with other emissions, to feed microbes that can then become protein for companies that make pellets of food for fish. Those microbes are similar to ones that evolved to live near gas vents in the ocean; the startup arranges them with other species into “microbial factories” that work together to make the whole process more efficient.
The company is also developing new microbes, using synthetic biology, that can produce particular nutrients–vitamins or probiotics, for example–that can also be used as ingredients in feed. All of this will happen in pipes that help the gases dissolve in water, rather than in the large tanks that are used for fermentation in a brewery or some pharmaceutical companies. The pipes can connect directly to a cement plant or other industrial emitter and then into a fishmeal factory next door. Hydrogen, which can be produced through electrolysis of water using solar power, can provide energy for the system.