Integrated moving bed biofilm reactor with partial denitrification-anammox for promoted nitrogen removal: Layered biofilm structure formation and symbiotic functional microbes

被引：48

作者：

Xue, Zhaoxia ^{[1
,2
]}

Zhang, Teng ^{[1
,2
]}

Sun, Yiwen ^{[1
,2
]}

Yin, Tongxin ^{[1
,2
]}

Cao, Jiashun ^{[1
,2
,3
]}

Fang, Fang ^{[1
,2
]}

Feng, Qian ^{[1
,2
]}

Luo, Jingyang ^{[1
,2
]}

机构：

[1] Hohai Univ, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, Nanjing 210098, Peoples R China

[2] Hohai Univ, Coll Environm, Nanjing 210098, Peoples R China

[3] Guohe Environm Res Inst Nanjing Co Ltd, Nanjing 211599, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2022年 / 839卷

基金：

中国国家自然科学基金;

关键词：

Partial denitrification; Anaerobic ammonia oxidation; Moving bed biofilm reactor; Nitrogen removal; Layered biofilm structure; Functional microbes; WASTE-WATER TREATMENT; SEQUENCING BATCH REACTOR; ANOXIC AMMONIUM OXIDATION; TREATMENT PLANTS; SLUDGE; NITRITE; NITRATE; LIQUID; PH;

D O I：

10.1016/j.scitotenv.2022.156339

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Partial denitrification/anaerobic ammonia oxidation (anammox) (PD/A) is currently an advanced nitrogen removal process. This study developed a PD/A system in a moving bed biofilm reactor. Results showed that the nitrogen removal efficiency reached 76.60% with a COD/NO3-N of 2.0, and the contribution of anammox was 88.01%. Further analysis showed that the biocarriers could form layered pH and dissolved oxygen structures to promote the aggregation of different functional bacteria at various depths, thus stabilizing the coupled process. Microbial structure analysis showed that the abundance of Saccharimonadales, responsible for denitrification, increased from 0% to 36.27% between day 0 and day 120, while the abundance of Candidatus Jettenia, responsible for anammox, decreased from 10.41% to 2.20%. The synergistic effect of Saccharimonadales and Candidatus Jettenia enabled stable and efficient removal of nitrogen. This study proposed a novel configuration of the PD/A process and provided a theoretical basis for its promotion and application.

引用

页数：7

共 38 条

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