Sustainable nutrition with algae
The greatest challenge facing today's agriculture industry is to produce healthy foods that do not place undue stress on the planet. Algae could one day represent an important piece of the puzzle in food production. They are nutritious, space-saving and suitable as food for humans and animals.
Friday, November 12, 2021
According to the latest estimates by the United Nations, 9.7 billion people will be living on earth in 2050. Food production must keep pace with population growth. However, fertile land is scarce and should not be used for agriculture in order to preserve biodiversity and climate stability. In the future, we will therefore be dependent on food that does not grow directly out of the ground and is relatively space-saving. One example is algae - more precisely microalgae.
They are produced in bioreactors. Some of these systems have glass tubes several hundred kilometers in length in order to optimally capture the sunlight. However, there are also small facilities for local production. For example, production can also take place in the city, which is possible without further land use. Because the algae are rich in nutrients, they are ideal for consumption and as a component in dietary supplements. However, bio-plastics, medicinal agents against inflammation and infections with bacteria or viruses, and valuable cosmetic ingredients can also be produced using different types of algae.
Algae as animal feed
Algae could play an important role in nutrition indirectly as animal feed. One example is aquaculture - that is, the breeding of fish, mussels or crabs. They require feeds that are high in omega-3 fatty acids. The common practice is to feed them with fish meal. However, this is not resource-efficient. According to the FAO, approximately 19 percent of the fish caught in the wild are used for the production of fish meal or fish oil.
The production of algae oil from agricultural raw materials makes it unnecessary to process wild fish into feed meal and use it as feed for aquaculture. One ton of algae oil can replace over 60 tons of wild-caught fish. The MSC-certified algae oil from the company Veramaris – a joint venture between DSM and Evonik – can cover the feed requirements of close to 15 percent of global salmon and trout farming, thus replacing over one million tons of wild-caught fish every year that as a result do not have to be processed into fish meal.
Related articles
Chasing Misinformation Feels Like Herding Cats
Science fiction has a way of masquerading as science fact — until someone like me comes with a bucket of cold, hard evidence. But let’s be real: debunking nonsense takes exponentially more effort than producing it. Jonathan Swift knew it in 1710, and here I am, centuries later, still speaking my truth before the next viral misinformation dumpster fire.
Climate protection must not jeopardise food security
Agriculture is increasingly under pressure to become climate-neutral. But how can this be achieved without jeopardising food security? In the agricultural policy podcast, Hannah von Ballmoos-Hofer, head of the energy division at the Swiss Farmers' Union, emphasises that climate protection is important, but must not come at the expense of food security.
Tradition and innovation go hand in hand when it comes to food
The study ‘Decoding Food Culture’ by the Gottlieb Duttweiler Institute shows how deeply food culture shapes our lives. That is why it is a balancing act between tradition and innovation to bring about changes in nutrition.
The underestimated danger of plant toxins
Plants produce a variety of chemical substances to protect themselves against predators and diseases, for example. These substances can have a toxic effect in high doses. A recent study by Agroscope highlights the danger of natural substances in Swiss waters.