Evidence map›Paper›PMID 34699005›Full record

ArticleEnvironmental science and pollution research international2022

Role of organic/sulfide ratios on competition of DNRA and denitrification in a co-driven sequencing biofilm batch reactor.

Xiaoling Li, Jianqiang Zhao, Yuhao Zhang, Jiaojie He, Kaili Ma, Chunshuang Liu

Abstract read
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In one paragraph

Article in Environmental science and pollution research international, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.7field-weighted citation impact, top 35% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed, 24 citations in OpenAlex.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Xiaoling LiSchool of Civil Engineering, Key Laboratory of Water Supply &, Sewage Engineering Ministry of Housing and Urban-Rural Development, Chang'an University, Xi'an, 710054, China.
Jianqiang ZhaoSchool of Water and Environment, Chang'an University, Xi'an, 710055, China. 626710287@qq.com.
Yuhao ZhangSchool of Water and Environment, Chang'an University, Xi'an, 710055, China.
Jiaojie HeSchool of Civil Engineering, Key Laboratory of Water Supply &, Sewage Engineering Ministry of Housing and Urban-Rural Development, Chang'an University, Xi'an, 710054, China.
Kaili MaSchool of Environment, Henan Normal University, Xinxiang, 453000, China.
Chunshuang LiuCollege of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.
Chang'an University · CNMinistry of Housing and Urban-Rural Development · CNChina University of Petroleum, East China · CNHenan Normal University · CN

Funding

Henan Natural Science Foundation 212300410179Natural Science Foundation of China 51178007Natural Science Foundation of China 51808045Shannxi Provincial Science and Technology Planning Project 2019JQ-686
6 · The paper itself

Abstract

Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are two competing pathways in nitrate-reducing process. In this study, a series of C/S ratios from 8:1 to 2:4 were investigated in a sequencing biofilm batch reactor (SBBR) to determine the role of reducers (sulfide and acetate) on their competition. The results showed that the proportion of DNRA increased in high electron system, either in organic-rich system or in sulfide-rich system. The highest DNRA ratio increased to 16.4% at the C/S ratio of 2:3. Excess electron donors, particularly sulfide, were favorable for DNRA in a limited nitrate environment. Moreover, a higher reductive environment could facilitate DNRA, especially, when ORP was lower than - 400 mV in this system. 16S rRNA gene sequencing analysis demonstrated that Geobacter might be the important participant involved in DNRA process in organic-rich system, while Desulfomicrobium might be the dominant DNRA bacteria in sulfide-rich system. DNRA cultivation could enrich nitrogen conversion pathways in conventional denitrification systems and deepen the insight into nitrogen removal at low C/N.

Indexed as

Ammonium CompoundsNitratesBiofilmsDenitrificationHumansNitrogenOxidation-ReductionRNA, Ribosomal, 16SSulfidesAmmonium CompoundsNitratesNitrogenRNA, Ribosomal, 16SSulfidesC/SDenitrificationDissimilatory nitrate reduction to ammonium (DNRA)Microbial communitiesNitrogen conversion pathways

Identifiers

PMID34699005
OpenAlexW3209868436

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.