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Partial nitritation of stored source-separated urine by granular activated sludge in a sequencing batch reactor

Overview of attention for article published in AMB Express, February 2017
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  • Good Attention Score compared to outputs of the same age and source (67th percentile)

Mentioned by

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2 tweeters

Citations

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Readers on

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37 Mendeley
Title
Partial nitritation of stored source-separated urine by granular activated sludge in a sequencing batch reactor
Published in
AMB Express, February 2017
DOI 10.1186/s13568-017-0354-9
Pubmed ID
Authors

Liping Chen, Xiaoxiao Yang, Xiujun Tian, Song Yao, Jiuyi Li, Aimin Wang, Qian Yao, Dangcong Peng

Abstract

The combination of partial nitritation (PN) and anaerobic ammonium oxidation (anammox) has been proposed as an ideal process for nitrogen removal from source-separated urine, while the high organic matters in urine cause instability of single-stage PN-anammox process. This study aims to remove the organic matters and partially nitrify the nitrogen in urine, producing an ammonium/nitrite solution suitable for anammox. The organic matters in stored urine were used as the electron donors to achieve 40% total nitrogen removal in nitritation-denitrification process in a sequencing batch reactor (SBR). Granular aggregates were observed and high mixed liquor suspended solids (9.5 g/L) were maintained in the SBR. Around 70-75% ammonium was oxidized to nitrite under the volumetric loading rates of 3.23 kg chemical oxygen demand (COD)/(m(3) d) and 1.86 kg N/(m(3) d), respectively. The SBR produced an ammonium/nitrite solution free of biodegradable organic matters, with a NO2(-)-N:NH4(+)-N of 1.24 ± 0.13. Fluorescence in situ hybridization images showed that Nitrosomonas-like ammonium-oxidizing bacteria, accounting for 7.2% of total bacteria, located in the outer layer (25 μm), while heterotrophs distributed homogeneously throughout the granular aggregates. High concentrations of free ammonia and nitrous acids in the reactor severely inhibited the growth of nitrite-oxidizing bacteria, resulting in their absence in the granular sludge. The microbial diversity analysis indicated Proteobacteria was the predominant phylum, in which Pseudomonas was the most abundant genus.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 37 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 37 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 6 16%
Student > Bachelor 5 14%
Researcher 5 14%
Student > Doctoral Student 4 11%
Student > Ph. D. Student 4 11%
Other 6 16%
Unknown 7 19%
Readers by discipline Count As %
Environmental Science 8 22%
Engineering 6 16%
Biochemistry, Genetics and Molecular Biology 3 8%
Social Sciences 2 5%
Business, Management and Accounting 1 3%
Other 4 11%
Unknown 13 35%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 February 2017.
All research outputs
#5,206,276
of 9,723,500 outputs
Outputs from AMB Express
#193
of 624 outputs
Outputs of similar age
#136,485
of 255,853 outputs
Outputs of similar age from AMB Express
#15
of 55 outputs
Altmetric has tracked 9,723,500 research outputs across all sources so far. This one is in the 43rd percentile – i.e., 43% of other outputs scored the same or lower than it.
So far Altmetric has tracked 624 research outputs from this source. They receive a mean Attention Score of 2.2. This one has gotten more attention than average, scoring higher than 56% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 255,853 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 42nd percentile – i.e., 42% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 55 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 67% of its contemporaries.