MICROALGAE FOR AQUACULTURE WASTEWATER TREATMENT MICROTERRA Mexican start-up Microterra is bringing to market a circular economy solution using microalgae to treat aquaculture wastewater for reuse in the fish farms as well as produce a sustainable protein that can be converted into fish feed. The aquaculture wastewater from the fish tanks is fed into bioreactors to cultivate microalgae that feed on the nutrients from fish manure. After the microalgae grows, stimulated by sunlight, they are harvested and used as a protein source for the fish feed. The technology is a closed-loop system, with the bioreactors composed of water columns made out of vertical plastic bags.
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