混合营养反硝化过程的氮去除性能及微生物群落。
The nitrogen removal performance and microbial community on mixotrophic denitrification process.
机构信息
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China.
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China.
出版信息
Bioresour Technol. 2022 Nov;363:127901. doi: 10.1016/j.biortech.2022.127901. Epub 2022 Sep 6.
Sulfur autotrophic denitrifiers and heterotrophic denitrifiers widely exist in aquatic ecosystem, however, the response of sulfide to the microbial community structure in mixotrophic denitrification ecosystem is unknown yet. In this study, the denitrification performance and microbial community were explored by changing the molar ratio of influent C/N/S. From the level of genus, the joint action of Thauera, Pacacoccus, Fusibacter Pseudoxanthomonas, Thiobacillus, Sulfurovum and Sulfurimonas brought about the efficient denitrification performance in the mixotrophic system. Thauera increased from from 0.97% to more than 13%, and the relative abundances of Thiobacillus and Sulfurimonas were about 4.14% and 3.89% separately after adding S. The results of this study showed that the denitrification performance could be indeed intensified in the mixotrophic system, among which provided a theoretical basis for establishing an efficient biological nitrogen removal system.
硫自养反硝化菌和异养反硝化菌广泛存在于水生生态系统中，然而，硫对混合营养反硝化生态系统中微生物群落结构的响应尚不清楚。在本研究中，通过改变进水 C/N/S 的摩尔比来探索反硝化性能和微生物群落。从属的水平来看，硫自养反硝化菌、假单胞菌属、互营杆菌属、假黄单胞菌属、硫杆菌属和硫矿硫化叶菌属的共同作用在混合营养系统中带来了高效的反硝化性能。硫自养反硝化菌的比例从 0.97%增加到 13%以上，添加 S 后，硫杆菌属和硫矿硫化叶菌属的相对丰度分别约为 4.14%和 3.89%。本研究结果表明，混合营养系统中的反硝化性能确实可以得到强化，这为建立高效生物脱氮系统提供了理论依据。
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