Enhancing ammonium oxidizing bacteria activity was key to single-stage partial nitrification-anammox system treating low-strength sewage under intermittent aeration condition

被引：108
作者：
Miao, Yuanyuan [1 ]
Zhang, Liang [1 ]
Li, Baikun [1 ]
Zhang, Qian [1 ]
Wang, Simeng [1 ]
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
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 231卷
关键词：
Single-stage partial nitrification-anammox; Low-strength sewage; Stabilization enhancement; Bio-augmentation; Intermittent aeration; DOMESTIC WASTE-WATER; NITROGEN REMOVAL; FULL-SCALE; PARTIAL NITRITATION/ANAMMOX; ACTIVATED-SLUDGE; NITRITE; OXIDATION; REACTOR; DEAMMONIFICATION; QUANTIFICATION;
D O I：
10.1016/j.biortech.2017.01.045
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Intermittent aeration and bio-augmentation were integrated to enhance single-stage partial nitrificationanammox (SPN/ A) stability over 235-day operational period treating low-strength sewage. The effect of bio-augmentation sludge (with different abundances of ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB)) was determined. Partial nitrification sludge based bio-augmentation increased the total nitrogen (TN) removal efficiency from 29.1% to 70%, followed by the nitrification sludge (from 38.1% to 65.4%), then the denitrifying phosphorus sludge (from 42.1% to 54.4%). The evolution of bacteria activity and communities showed that anammox activity increased with the enhancement of AOB activity, and higher AOB abundance led to higher anammox bacterial abundance despite high NOB abundance. The enhancement of AOB activity produced more nitrite, anammox bacteria gained more nitrite than NOB since intermittent aeration selectively inhibited NOB, thus the reactor stability enhanced substantially. This study highlights the significance of enhancing AOB activity to ensure long-term operational stability of SPN/A processes. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：36 / 44
页数：9
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