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首页> 外文期刊>Aquacultural Engineering: An International Journal >Application of nitrification and denitrification processes in a direct water reuse system for pacific white shrimp farmed in biofloc system
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Application of nitrification and denitrification processes in a direct water reuse system for pacific white shrimp farmed in biofloc system

机译：硝化和反硝化过程在生物环系统中养殖的太平洋白虾直接水再利用系统中的应用

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摘要

The aim of the present study was to propose a low-cost nitrogen removal system through the nitrification / denitrification process in order to maintain the water quality required for the Pacific white shrimp superintensive cultivation in closed systems without water renewal. The increase in productivity consequently causes the accumulation of organic matter and nitrogenous compounds, especially ammonia nitrogen and nitrite, which in high concentrations can be lethal to aquatic organisms. In addition, the accumulation of solids in the system provides conditions for the emergence of opportunistic pathogens, microalgae booms, and increases the producer's cost of inputs to maintain the equilibrium physicochemical relationships required for shrimp farming. The experimental productive cycle lasted 36 days using Litopenaeus vannamei shrimps with 7.1 g +/- 0.56 g and density of 350 shrimps m(-3). The nitrogen removal efficiency observed during the study period was 71.3 +/- 5.3 %, and the shrimp had a survival of 92.9 % and a final weight of 13.1 +/- 1.4 g. Thus, we established a system (ammonia and nitrite), capable of managing solids without interaction with the sea, ensuring high biosecurity against exogenous diseases in marine shrimps farms.
机译：本研究的目的是通过硝化/脱氮过程提出低成本的氮气去除系统，以维持在没有水更新的封闭系统中的太平洋白虾过度栽培所需的水质。因此，生产率的增加导致有机物和含氮化合物的积累，尤其是氨氮和亚硝酸盐，其在高浓度可以是水生生物的致命。此外，系统中固体的积累提供了机会主义病原体，微藻臂的出现的条件，并提高了生产者的输入成本，以维持虾养殖所需的平衡物理化学关系。实验生产循环使用Litopenaeus Vannamei虾持续36天，具有7.1g +/- 0.56g和350虾米（-3）的密度。在研究期间观察到的氮去除效率为71.3 +/- 5.3％，虾的存活率为92.9％，最终重量为13.1 +/- 1.4g。因此，我们建立了一种系统（氨和亚硝酸盐），能够管理固体而不与海洋相互作用，确保高生物安全性对海洋虾农场的外源性疾病。

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