Nitrogen Removal from Mature Landfill Leachate via Denitrification-Partial Nitritation-ANAMMOX Based on a Zeolite Biological Aerated Filter

被引：0
作者：
Chen X.-Z. [1 ,2 ]
Wang X.-J. [1 ,2 ]
Chayangkun K. [1 ,2 ]
Zhou S.-W. [1 ,2 ]
Zhong Z. [1 ,2 ]
Chen Z.-G. [3 ,4 ]
Chen X.-K. [1 ,2 ]
机构：
[1] School of Environment and Energy, South China University of Technology, Guangzhou
[2] Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Cluster, Ministry of Education, Guangzhou
[3] School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou
[4] Hua An Biotech Co., Ltd., Foshan
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 01期
关键词：
Anaerobic ammonium oxidation(ANAMMOX); Mature landfill leachate; Partial nitritation; Pre-denitrification; Zeolite biological aerated filter;
D O I：
10.13227/j.hjkx.201906165
中图分类号：
学科分类号：
摘要：
A combined process of denitrification-partial nitritation-ANAMMOX based on a zeolite biological aerated filter (ZBAF) was applied to treat mature landfill leachate. We investigate the partial nitritation characteristics of the ZBAF and the nitrogen removal performance as well as the carbon removal performance of the combined process. Results showed that, based on the selective inhibition of nitrite oxidizing bacteria (NOB) by free ammonia (FA), the ZBAF could successfully achieve stable and efficient partial nitrification of mature landfill leachate, with an average nitrite accumulation rate (NAR) of 93.8% and a maximum nitrite production rate (NPR) of 1.659 kg•(m3•d)-1. After adding 700 mg•L-1 glucose to the influent, due to the synergistic effect of denitrification and anammoxidation, the combined process achieved its best nitrogen removal performance at a reflux ratio of 2.0 and hydraulic retention time (HRT) of 2.2 days. The average ammonia removal efficiency (ARE), total nitrogen removal efficiency (NRE), total nitrogen removal loading rate (NRR), and average chemical oxygen demand (COD) removal efficiency were 97.2%, 90.0%, 0.585 kg•(m3•d)-1, and 45.3%, respectively. Furthermore, the NRR of the anaerobic ammonium oxidation (ANAMMOX) process (NRRANA) reached 1.268 kg•(m3•d)-1. High-throughput sequencing technology was used to analyze the microbial community structure in each device. Results showed that denitrifiers (Paracoccus and Comamonas), ammonia-oxidizing bacteria (AOB) (Nitrosomonas), and ANAMMOX bacteria (Candidatus Kuenenia and Candidatus Anammoxoglobus) were the dominant bacteria in the UASB, ZBAF, and ANAMMOX reactor, respectively, which corresponded to the stable nitrogen removal performance of the combined process. © 2020, Science Press. All right reserved.
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页码：345 / 352
页数：7
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