The remnant solids were used as feedstock to generate biogas via anaerobic digestion, with the co-digestate being applied as agricultural fertiliser. The defatted biomass was subjected to enzymatic hydrolysis to obtain an amino-acid rich solution. Instead of discarding the waste, researchers put it into the circular economy. This process, however, resulted in two types of solid waste: defatted biomass and remnant solids. Using an extraction process called alkaline hydrolysis, oil was removed from wet biomass and converted into high-quality biodiesel. CYCLALG in actionįor example, researchers validated the process of producing Chlorella, an oil-rich microalga, using a 1000 litre reactor. The waste of the resulting products is reused as nutrients to grow the microalgae, which is processed into the fertilizers and chemicals used in agriculture. The biorefinery produces fertilizers and chemicals the agriculture industry uses to grow and produce food. Put together, the CYCLALG system is the essence of the circular economy. Researchers from the Spain-France-Andorra cross-border overcame this challenge by developing new technologies and production methods. When cultivated to have a high protein and oil content, microalgae – the microscopic species of algae found in freshwater and marine systems – can be used to produce biofuels, food, feedstock and dietary supplements.īut its high production costs have remained a roadblock to full-scale industrial development. The circular economyīig expectations have surrounded the use of microalgae as a sustainable source of energy, food, feedstock and chemicals. By offering the food industry an innovative option for waste management, CYCLALG simultaneously improved the profit potential of microalgae-based industries. This eliminated one of the key hurdles to developing a sustainable microalgae production industry. Instead of simply disposing of it, CYCLALG uses it as a source of nutrients for cultivating microalgae. For the former, project researchers created an innovative biorefinery that uses an integrated, sequential process for turning microalgae into energy, chemicals, and fertilizers.ĬYCLALG reintroduced a process for reusing the solid, nutrient-rich organic waste generated during the industrial processing of fruits and vegetables. The project had two objectives: to create a viable process for converting algae biomass into marketable bio-products and to reuse organic waste to grow microalgae.
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