Advanced nitrogen removal from low C/N municipal wastewater by combining partial nitrification-anammox and endogenous partial denitrification-anammox (PN/A-EPD/A) process in a single-stage reactor

被引：0
|
作者：
Cui, Huihui [1 ]
Zhang, Liang [1 ]
Zhang, Qiong [1 ]
Li, Xiyao [1 ]
Huang, Yu [1 ,2 ]
Peng, Yongzhen [1 ]
机构：
[1] Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
[2] Jiangsu Yulong Environm Protect Co Ltd, 6 Huahui Rd,EP Ind Pk, Yixing 214214, Jiangsu, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 339卷
基金：
中国国家自然科学基金;
关键词：
Anaerobic ammonia oxidation (anammox); NOB inhibition; Endogenous partial denitrification (EPD); Municipal sewage; Integrate fixed biofilm activated sludge (IFAS); AEROBIC GRANULAR SLUDGE; ACTIVATED-SLUDGE; PARTIAL NITRITATION; PHOSPHORUS REMOVAL; FREE AMMONIA; COD/N RATIO; SEWAGE; CARBON; COMMUNITIES;
D O I：
10.1016/j.biortech.2021.125501
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, an innovative partial nitrification-anammox (PN/A) and endogenous partial denitrificationanammox (EPD/A) process was developed in a single-stage integrated fixed film activated sludge sequencing batch reactor (IFAS-SBR) treating real municipal wastewater with C/N ratio below 3.2. Enhanced efficiency of total nitrogen (TN) removal reached 90.1% with low HRT of 12 h and DO of 0.4 +/- 0.1 mg/L. Detailed nitrogen removal mechanism analysis of typical cycle revealed that 89.9% of TN was eliminated through anammox pathway. Anammox bacteria (Candidatus Brocadia) and endogenous denitrifying bacteria (Candidatus Competibacter) were abundant both in biofilms and suspended sludge, meanwhile ammonium-oxidizing bacteria has outcompeted nitrite-oxidizing bacteria, which all favored the synergistic effect of anammox with PN and EPD and contributed to the improvement of nitrogen removal. Overall, the above results confirmed that combined PN/A and EPD/A process is a reliable and efficient alternative for mainstream anammox process.
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页数：10
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