Aquaponic : "is a food production system that combines conventional aquaculture (raising aquatic animals such as snails, fish, crayfish or prawns in tanks) with hydroponics (cultivating plants in water) in a symbiotic environment. In normal aquaculture, excretions from the animals being raised can accumulate in the water, increasing toxicity. In an aquaponic system, water from an aquaculture system is fed to a hydroponic system where the by-products are broken down by nitrogen-fixing bacteria into nitrates and nitrites, which are utilized by the plants as nutrients. The water is then recirculated back to the aquaculture system. As existing hydroponic and aquaculture farming techniques form the basis for all aquaponics systems, the size, complexity, and types of foods grown in an aquaponics system can vary as much as any system found in either distinct farming discipline."
The designed trickling filter systems with LECA were able to treat the fish wastewater in RAS adequately, while providing growth area for crop plants. The integrated system produced both fish and vegetables (aubergine, tomato, cucumber) suitable for human consumption.
Additional experiments showed that also industrial hemp, roses [14] and herbs (basil, parsley) can be successfully cultivated in aquaponic.
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