INAPRO: Innovating aquaponics
Aquaponics may be still largely unknown by the general public, but it’s a growing trend which has the potential to feed the growing world population.
This green technology couples aquaculture and horticulture whilst saving water, energy and nutrients. In an aquaponic system, the used water from the aquaculture sector, which is rich in nutrients, is used to grow the plants. Aquaponics is a highly efficient way of producing food, but, large scale installations lack stability, standardisation and economical profitability.
The EU-funded project INAPRO aims to overcome these limitations by innovating and improving aquaponics in order to respond to the global challenge of sustainable food production. The INAPRO system optimises aquaponics through the integration of cutting-edge technologies and by providing a modular solution for the management of water, energy and nutrients. The final goal of the project is the commercialisation of an innovative model-based aquaponic system.
The main innovation provided by INAPRO is the double recirculation aquaponic system (DRAPS) for water, consisting of a recirculating aquaculture system (RAS) for the fish section and a recirculating hydroponic system for the plants section. These two systems run independently and are linked only through a one-way valve. In the INAPRO system, the wastewater from the aquaculture sector is used as fertiliser for the hydroponically grown crops and then, thanks to a cooling trap system, the evapo-transpirated water is captured from the horticulture sector and reinserted into the aquaculture sector. This system allows to establish and maintain optimal conditions in both parts, avoiding negative interactions between the fish and the plants.
Thanks to this innovation, the INAPRO system allows the production of fish and vegetables with almost no external water input. Indeed, INAPRO needs a daily water input representing only 1-3% of the total amount of water circulating in the system. INAPRO has been developed to be scalable to greenhouses of different dimensions and under different climate conditions. Moreover, depending on where the greenhouse is located, the system can use different sources of water (including rainwater) and can be powered by different sources of renewable energy, cutting both costs and greenhouse gas emissions.
INAPRO allows the production of local, healthy and sustainable food that is free from contaminants and chemical residues. In fact, INAPRO does not require fish drugs and antibiotics and employs only a minimal amount of fertilisers. Since the food is produced in a closed system, no pollution is dispersed in the surrounding environment avoiding any negative impact on soil and groundwater.
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