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Start-up of the completely autotrophic nitrogen removal over nitrite process with a submerged aerated biological filter and the effect of inorganic carbon on nitrogen removal and microbial activity.

Abstract：

:Good start-up and performance are essential for the completely autotrophic nitrogen removal over nitrite (CANON) process, and inorganic carbon (IC) is also important for this process. In this study, a lab-scale submerged aerated biological filter (SABF) was adopted for the CANON process. A 16S rRNA gene high-throughput sequencing analysis showed that the phyla Proteobacteria and Planctomycetes were the dominant microorganisms and that the genus Candidatus Brocadia functioned as the nitrogen remover. The effect of IC on the nitrogen removal was analyzed. The results showed that the optimum concentration ratio of IC to nitrogen (IC/N) was 1.2, which produced the highest average ammonium nitrogen removal rate (ANR) and total nitrogen removal rate (TNR) values of 95.5% and 80.3%, respectively. The average AOB and AnAOB activities were 2.45 mg·L-1·h-1 and 3.57 mg·L-1·h-1, respectively. This research could promote the nitrogen removal ability of the CANON process with a SABF in the future.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Yue X,Yu G,Liu Z,Lu Y,Li Q

doi

10.1016/j.biortech.2018.01.107

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

347-352

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30121-4

journal_volume

254

pub_type

杂志文章

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