厌氧氨氧化菌
异养
硝酸盐
化学
亚硝酸盐
氨
碳纤维
环境化学
氮气
反硝化
细菌
生物化学
生物
反硝化细菌
有机化学
材料科学
复合材料
复合数
遗传学
作者
Jinyuan Ma,Kaijun Wang,Chuan Shi,Yue Liu,Cheng Yu,Kaijun Wang,Xiangyun Fu,Quan Yuan,Yuan Zhou,Hui Gong
标识
DOI:10.1016/j.biortech.2021.126525
摘要
Anaerobic ammonium oxidation (anammox) is a cost-effective nitrogen removal pathway but instinctively generated nitrate limits its application. A novel anammox aggregate reduced the production of nitrate significantly with efficient removal of ammonia and nitrite in this work. The results demonstrated that the internal heterotrophic nitrate removal (IHNAR) pathway exists stably at inner of anammox aggregates, which eliminated 42.31 ± 3.85 % nitrate generated in anammox at without consuming external carbon source. The observed volatile fatty acids (VFAs) and adequate protein, polysaccharide and humic acids in the aggregates verified that the in-situ fermentation supplied sustainably endogenous carbon sources for the IHNAR. The efficient interspecies cooperation between anammox bacteria, heterotrophic denitrifiers and fermentative bacteria was identified, as the intrinsic justification for the obtained sustainability of IHNAR pathway. The findings were expected to provide theoretical guidance for promotions and applications of the anammox process with high-efficiency total nitrogen removal capabilities.
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