Influence of influent suspended solids concentration on a two-stage partial nitrification/anammox process treating liquid digestate of kitchen waste: Nitrogen removal performance and microbial community analysis

被引：0
|
作者：
Li, Shuo [1 ]
Chen, Xiang [2 ,3 ]
Gong, Hui [4 ,5 ]
Yang, Jing [4 ,5 ]
Guo, Qian [1 ,4 ]
Wang, Xiankai [2 ,3 ]
Wang, Hang [2 ,3 ]
Zhu, Danyang [4 ,5 ]
Zhang, Yanyan [4 ,5 ]
Zhou, Shuyan [4 ,5 ]
Azari, Mohammad [6 ]
Dai, Xiaohu [4 ,5 ]
机构：
[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 201306, Peoples R China
[2] China Three Gorges Corp, YANGTZE Ecoenvironm Engn Res Ctr, Wuhan 430010, Hubei, Peoples R China
[3] Natl Engn Res Ctr Ecoenvironm Protect Yangtze Rive, Wuhan 430010, Hubei, Peoples R China
[4] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
[5] Tongji Univ, Key Lab Urban Water Supply Water Saving & Water En, Minist Water Resources, Shanghai 200092, Peoples R China
[6] Karlsruhe Inst Technol KIT, Inst Water & Environm IWU, Dept Water Qual Management, Gotthard Franz Str 3, D-76131 Karlsruhe, Germany
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2025年 / 13卷 / 02期
关键词：
Partial nitrification/anammox (PN/A); Suspended solids (SS); Liquid digestate; Nitrogen removal; Metagenome; PARTIAL NITRITATION; WATER TREATMENT; REACTOR; ANAMMOX; EPS;
D O I：
10.1016/j.jece.2025.115452
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Two-stage partial nitrification/anammox (PN/A) process is widely used to treat liquid digestate, but the higher concentration of influent suspended solids (SS) may hinder the nitrogen removal performance of PN/A system. In this study, the two-stage PN/A process was used to treat kitchen liquid digestate with high SS concentration (HSS, 6000 mg/L) and low SS concentration (LSS, 1700 mg/L), respectively. Compared to the HSS influent mode, the LSS mode exhibits better nitrogen removal efficiency. The results were attributed to the variation in the abundance of functional bacteria and a noticeable decrease in the abundance of key enzymes. In reactor with high SS, the anammox process is constrained by the rate-limiting steps of converting NO to N2H4 and then to N2. In summary, HSS can negatively affect the two-stage PN/A process. Therefore, this study can provide theoretical support for the treatment of actual wastewater with varying SS contents using anammox-based technologies.
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页数：11
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