Abstract
Performance and microbial community dynamics in an upflow anaerobic sludge bed (UASB) reactor coupled with anaerobic ammonium oxidizing (Anammox) treating diluted chicken manure digestate (Total ammonia nitrogen; TAN = 123 ± 10 mg/L) were investigated for a 120-d operating period in the presence of anaerobic granular inoculum. Maximum TAN removal efficiency reached to above 80% with as low as 20 mg/L TAN concentrations in the effluent. Moreover, total COD (tCOD) with 807 ± 215 mg/L in the influent was removed by 60–80%. High-throughput sequencing revealed that Proteobacteria, Actinobacteria, and Firmicutes were dominant phyla followed by Euryarchaeota and Bacteroidetes. The relative abundance of Planctomycetes significantly increased from 4% to 8–9% during the late days of the operation with decreased tCOD concentration, which indicated a more optimum condition to favor ammonia removal through anammox route. There was also significant association between the hzsA gene and ammonia removal in the UASB reactor.
Original language | English |
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Pages (from-to) | 332-339 |
Number of pages | 8 |
Journal | Bioresource Technology |
Volume | 241 |
DOIs | |
Publication status | Published - 2017 |
Bibliographical note
Publisher Copyright:© 2017 Elsevier Ltd
Keywords
- Ammonia removal
- Anammox
- Chicken manure
- Next generation sequencing
- Planctomycetes
- UASB reactor