Nitrogen removal in recirculating aquaculture water with high dissolved oxygen conditions using the simultaneous partial nitrification, anammox and denitrification system.
Nitrogen removal in recirculating aquaculture water with high dissolved oxygen conditions using the simultaneous partial nitrification, anammox and denitrification system.
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DOI：
10.1016/j.biortech.2020.123037
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发表时间：
2020-02
影响因子：
11.4
通讯作者：
Jian Lu;Yuxuan Zhang;Jun Wu;Jianhua Wang
中科院分区：
文献类型：
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作者：
Jian Lu;Yuxuan Zhang;Jun Wu;Jianhua Wang
由于养殖废水中有机碳浓度低、溶解氧浓度高，因此，养殖系统中氮污染物的有效去除仍然是一个挑战。首次将同步短程硝化-厌氧氨氧化-反硝化（SNAD）生物反应器应用于循环水养殖废水处理。该生物反应器在不添加额外有机碳的情况下运行了180天。运行60 d后，反应器进入稳定运行阶段，出水氨氮/硝酸盐/亚硝酸盐/COD的平均浓度分别为0.26/0.75/0.47/0.27 mg/L。假黄色单胞菌是生物膜样品中的优势菌属。在反应器的沿着不同工序中检测到不同丰度的硝化、厌氧氨氧化和反硝化功能菌和基因。网络分析表明，氮功能菌与基因之间存在显著的相关性。SNAD生物反应器实现了循环水养殖系统中高DO条件下氮和COD的有效去除。
The efficient removal of nitrogen pollutants in the aquaculture systems is still a challenge due to the low concentration of organic carbon and high concentration of dissolved oxygen (DO) in the wastewater. The simultaneous partial nitrification, anammox and denitrification (SNAD) bioreactor was firstly used for the treatment of aquaculture wastewater in recirculating aquaculture system. The bioreactor operated for 180 days without adding extra organic carbon. After 60-day operation, the bioreactor reached the stable stage with the average concentration of ammonia/nitrate/nitrite/COD in the effluent with 0.26/0.75/0.47/0.27 mg/L. ThePseudoxanthomonaswas the dominant genus in the biofilm samples. The typical nitrogen functional bacteria and genes for nitrification, anammox and denitrification were detected with different abundance in different procedures along the bioreactor. Network analysis revealed the significant correlations between nitrogen functional bacteria and genes. The SNAD bioreactor achieved the effective removal for nitrogen and COD under high DO conditions in recirculating aquaculture system.