Advanced Denitrification of Municipal Wastewater Achieved via Partial ANAMMOX in Anoxic MBBR

被引：0
|
作者：
Yang L. [1 ]
Peng Y.-Z. [1 ]
Li J.-W. [1 ]
Gao R.-T. [1 ]
Wang M. [1 ]
Li X.-Y. [1 ]
机构：
[1] National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing
来源：
Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 08期
关键词：
Advanced denitrification; Anaerobic ammonium oxidation(ANAMMOX); Anoxic biofilm; Moving bed biofilm reactor(MBBR); Municipal wastewater;
D O I：
10.13227/j.hjkx.201901015
中图分类号：
学科分类号：
摘要：
Anoxic MBBR is a process to achieve advanced denitrification from municipal wastewater. Here, anoxic MBBR was applied as a post-denitrification SBR to achieve advanced denitrification by partial anammox (anaerobic ammonium oxidation). During a 250-day operation, denitrification performance gradually improved and the total nitrogen concentration of the effluent was approximately 5 mg•L-1. The average nitrate, ammonia, and total inorganic nitrogen removal efficiencies were (97.7±2.9)%, (93.3±2.9)%, and (94.3±2.7)%, respectively, between day 211 and 250. The simultaneous removal of ammonia and nitrate was observed in the anoxic reactor. Analysis of the ammonia removal pathway revealed that assimilation and nitrification were poor in the anoxic MBBR. The anammox activity test and the denitrification performance showed that anammox occurred and played a not insignificant role in the anoxic MBBR. The results of real-time quantitative PCR showed that anammox bacteria enriched in anoxic MBBR, especially in the anoxic carrier biofilms, where the abundance of anammox bacteria increased from 4.37×107 copies•g-1 to 2.28×1010 copies•g-1. This study demonstrates that anoxic carrier biofilms may have potential applications in anammox bacterial enrichment to enhance denitrification from municipal wastewater. © 2019, Science Press. All right reserved.
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页码：3668 / 3674
页数：6
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