Improving nitrogen removal in biological aeration filter for domestic sewage treatment via adjusting microbial community structure

被引：33
作者：
Cui, Bin [1 ]
Yang, Qing [1 ]
Zhang, Yanping [2 ]
Liu, Xiuhong [1 ]
Wu, Wenjun [1 ]
Li, Jianmin [1 ]
机构：
[1] Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
[2] Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing 100048, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 293卷
基金：
北京市自然科学基金;
关键词：
Biological aeration filter; Backwash; Biofilm; Nitrogen removal; Microbial community structure; STRENGTH WASTE-WATER; REAL-TIME CONTROL; PARTIAL NITRIFICATION; ANAMMOX; BIOFILM; DENITRIFICATION; GROWTH;
D O I：
10.1016/j.biortech.2019.122006
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The rapid growth of nitrite-oxidizing bacteria (NOB) in reactor prevents the application of anaerobic ammonium oxidation (anammox) technology to main-stream wastewater treatment. How to eliminate NOB and reserve anaerobic ammonium oxidation bacteria (AnAOB) simultaneously becomes the biggest challenge. In this study two coupled biological aeration filters (BAFs) were built up to treat domestic sewage. In BAF1 nitrogen removal concentration was 21.4 mg/L via heterotrophic denitrification pathway. Backwash was conducted to BAF2 to improve nitrogen removal performance. After backwash Nitrospira proportion declined from 10.8% to 2.1%, while Candidatus Kuenenia percentage increased from 5.6% to 10.2%. Nitrogen removal concentration improved from 8.6 mg/L to 22.8 mg/L via anammox pathway in BAF2, and total nitrogen removal concentration reached to 44.2 mg/L in two coupled BAFs during aeration process. These findings could provide a new strategy for the application of anammox technology to main-stream wastewater treatment.
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页数：7
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