Study on utilization of Nitrosomonas sp. and Nitrobacter in an aquaponic system

Based on KKP data, Nile tilapia production is highly increasing from 2015–2018. To generate high production of Nile tilapia, an intensive culture system is needed. The latter indicated high-density stock and feed amount, which lead to a high accumulation of organic waste. The accumulation of organic waste considered harmful to fish commodity due to contained ammonia and nitrite which both of them categorized as toxic. The solution for the prior problem is by applying an aquaponic system along with the addition of Nitrosomonas and Nitrobacter probiotic to support the nitrification process.

Nitrification process described as the decreasing process of ammonia
and nitrite by oxidizing them into nitrate. The effective dosage of the probiotic has yet to be known, so this study aims to figure out whether the addition of those probiotic with certain dosage can decrease nitrite and increase nitrate. This study uses Rancang Acak Lengkap (RAL) with 5 treatments repeated 4 times. Nitrite and nitrate data analyzed by ANOVA. The result showed the addition of Nitrosomonas and Nitrobacter probiotic decrease nitrite and increase nitrate with 1,5 mg/L as the most effective dosage. Prior dosage decrease nitrite level into 0,0672 ± 0,0013 mg/L and increase nitrate level into 3,936 ± 0,1175 mg/.

Read the complete research at

Setiawan, D & Prayogo, & Rahardja, Boedi. (2021). Utilization of Nitrosomonas sp. and Nitrobacter sp. probiotic towards nitrite and nitrate level in nile tilapia (Oreochromis niloticus) using aquaponic system. IOP Conference Series: Earth and Environmental Science. 718. 012098. 10.1088/1755-1315/718/1/012098. 

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