Abstract：
:In the anammox process treating low-strength municipal wastewater, the effect of common seasonal temperature variation (15.1 °C-22.2 °C) on performance was studied. In autumn and winter, the nitrogen removal rate (NRR) decrement of 0.038kgN/(m3·d) (17.9 °C → 15.1 °C) was nearly threefold higher than 0.014kgN/(m3·d) (22.2 °C → 17.9 °C), which showed that lower temperature laid more negative impact on nitrogen removal. 15N isotope tracing tests confirmed that the contribution of denitrification to nitrogen removal was far less than anammox, and anammox contributed more at 15.1 °C (91.7%) than 21.9 °C (78.9%). Anammox bacteria could adapt to lower temperature after short-term acclimatization, especially the dominant genus Ca. Brocadia increased from 1.8% to 2.5% and its abundance was significantly correlated with nitrogen consumption (p < 0.05). Above findings suggest that the adaptability of Ca. Brocadia could provide the possibility to maintain nitrogen removal performance at lower temperature. In spring, the improved maximum anammox activity from 2.85 to 3.23mgNH4+-N/(gVSS·h) indicated the recovered removal capacity.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Gong X,Wang B,Qiao X,Gong Q,Liu X,Peng Ydoi
10.1016/j.biortech.2020.123590subject
Has Abstractpub_date
2020-09-01 00:00:00pages
123590eissn
0960-8524issn
1873-2976pii
S0960-8524(20)30862-2journal_volume
312pub_type
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