Lu Jian, Zhang Yuxuan, Wu Jun, Wang Jianhua
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, PR China.
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Bioresour Technol. 2020 Jun;305:123037. doi: 10.1016/j.biortech.2020.123037. Epub 2020 Feb 19.
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. The Pseudoxanthomonas was 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.
由于养殖废水中有机碳浓度低且溶解氧（DO）浓度高，水产养殖系统中氮污染物的高效去除仍然是一个挑战。同步短程硝化、厌氧氨氧化和反硝化（SNAD）生物反应器首次用于循环水养殖系统中水产养殖废水的处理。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天后，生物反应器达到稳定阶段，出水氨氮/硝酸盐/亚硝酸盐/化学需氧量的平均浓度为0.26/0.75/0.47/0.27mg/L。假黄单胞菌是生物膜样本中的优势菌属。在生物反应器的不同流程中，检测到了具有不同丰度的典型氮功能细菌以及硝化、厌氧氨氧化和反硝化的基因。网络分析揭示了氮功能细菌与基因之间的显著相关性。SNAD生物反应器在循环水养殖系统的高溶解氧条件下实现了对氮和化学需氧量的有效去除。
