Methods to measure nitrogen content in fish culture: A review

The reuse of solid waste coming from aquaculture and aquaponics industry is good not just in the environment ambit; also is a benefited in the economic aspect because it decreases the organic pollutant charge in the environmental aspect, respect to the economic aspect the fish feces is one of the nutritive dung containing almost 4.47% of nitrogen and 2.35% of phosphorous. So the first step to reusing these nutrients is to get a real measure of nitrogen from aquaculture and aquaponics wastewater after this the next step is to decide which kind of technique will be used to reduce the nutrients to an acceptable level. Aquaponics is a recent technology that has the benefit of joining two technologies: aquaculture and hydroponics. The importance of nitrogen measurement falls into controlling the quantity in aquaponics and aquaculture system to avoid problems related to high concentrations.