Abstract：
:In this study, a novel combinatorial control strategy was developed to guarantee a stable mainstream deammonification process, with three critical steps including (a) upflow airwater washing, (b) short-term increased nitrogen loading rate (NLR), and (c) low oxygen supply. Results showed that two upflow double-blanket filter (UDBF) reactors effectively performed the mainstream deammonification process with the nitrogen removal efficiency (NRE) 84.5 ± 2.2% and 84.6 ± 1.6%, respectively and nitrogen removal rate (NRR) 123.8 ± 2.9 and 125.5 ± 6.2 g N·(m3·d)-1, respectively. Statistically, temperature and C/N were considered as two vital factors affecting the nitrogen removal pathways, which co-explained 80.9% and 78.4% of the maximum possible contribution of heterotrophic denitrification in both reactors. The deammonification process accounted for more than 59.8% of TN removal in R2 and 54.8% in R1, which cooperated well with heterotrophic denitrification for efficient performance in treating municipal sewage.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Li Y,Xiang T,Liang H,Gao D,Wang Pdoi
10.1016/j.biortech.2020.124275subject
Has Abstractpub_date
2020-12-01 00:00:00pages
124275eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31549-2journal_volume
318pub_type
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