The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China.
Bioresour Technol. 2021 Apr;325:124602. doi: 10.1016/j.biortech.2020.124602. Epub 2020 Dec 23.
This study investigated an Iron-carbon (Fe-C) micro-electrolysis method to enhance nitrogen removal of Sesuvium portulacastrum constructed wetlands (CWs) when treating mariculture effluents. The main objective was to investigate the effects of Fe-C on nitrogen purification performance and microbial characteristics of Sesuvium portulacastrum CWs. Results showed that the presence of Fe-C and Sesuvium portulacastrum could improve nitrogen removal efficiency by 20-30% and 15-30%, respectively. CWs with 33% v/v Fe-C addition performed well on nitrogen removal: TAN, 41.49 ± 13.64%; NO-N, 13.32%; NO-N, 60.02 ± 6.17%; TIN, 63.40 ± 12.11%. Microbial analysis revealed that Fe-C altered the microbial communities, and improved the abundance of denitrification related genera. Based on microbial enzyme activities and genes abundance, the anammox and denitrification processes were promoted by Fe-C in CWs. These findings indicate that Sesuvium portulacastrum CWs with 33% v/v Fe-C represents an effective nitrogen removal for mariculture wastewater with insufficient carbon source.
本研究采用铁碳（Fe-C）微电解方法，研究了铁碳对处理海水养殖废水时海蓬子人工湿地（CWs）脱氮性能的影响及其微生物特性。结果表明，Fe-C 和海蓬子的存在分别可以将氮去除效率提高 20-30%和 15-30%。当添加 33%（v/v）Fe-C 时，CWs 对氮的去除效果最好：TAN 为 41.49±13.64mg/L；NO-N 为 13.32mg/L；NO-N 为 60.02±6.17mg/L；TIN 为 63.40±12.11mg/L。微生物分析表明，Fe-C 改变了微生物群落，并提高了反硝化相关属的丰度。基于微生物酶活性和基因丰度，Fe-C 促进了 CWs 中的厌氧氨氧化和反硝化过程。这些结果表明，对于碳源不足的海水养殖废水，添加 33%（v/v）Fe-C 的海蓬子 CWs 是一种有效的脱氮方法。
