Evidence map›Paper›PMID 26973608›Full record

ArticleFrontiers in microbiology2016

Biological Phosphorus Removal During High-Rate, Low-Temperature, Anaerobic Digestion of Wastewater.

Ciara Keating, Jason P Chin, Dermot Hughes, Panagiotis Manesiotis, Denise Cysneiros, Therese Mahony, Cindy J Smith, John W McGrath, Vincent O'Flaherty

Open access · goldAbstract read
In one paragraph

Article in Frontiers in microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
2.7field-weighted citation impact, top 11% 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

12 citing papers in PubMed, 64 citations in OpenAlex.

  1. Enhancing corn leaf fiber as phosphorus adsorbent material.Water environment research : a research publication of the Water Environment Federation · 2025
    Article
  2. Article
  3. Microbial single-cell applications under anoxic conditions.Applied and environmental microbiology · 2024
    Review
  4. Microbial electrosynthesis of acetate from COEnvironmental science and ecotechnology · 2023
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. 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

9 authors at 2 institutions in 2 countries.

Ciara KeatingMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
Jason P ChinSchool of Biological Sciences and the Institute for Global Food Security, The Queen's University of Belfast Belfast, UK.
Dermot HughesMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
Panagiotis ManesiotisSchool of Chemistry and Chemical Engineering, The Queen's University of Belfast Belfast, UK.
Denise CysneirosMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
Therese MahonyMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
Cindy J SmithMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
John W McGrathSchool of Biological Sciences and the Institute for Global Food Security, The Queen's University of Belfast Belfast, UK.
Vincent O'FlahertyMicrobial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland.
Ollscoil na Gaillimhe – University of Galway · IEQueen's University Belfast · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We report, for the first time, extensive biologically mediated phosphate removal from wastewater during high-rate anaerobic digestion (AD). A hybrid sludge bed/fixed-film (packed pumice stone) reactor was employed for low-temperature (12°C) anaerobic treatment of synthetic sewage wastewater. Successful phosphate removal from the wastewater (up to 78% of influent phosphate) was observed, mediated by biofilms in the reactor. Scanning electron microscopy and energy dispersive X-ray analysis revealed the accumulation of elemental phosphorus (∼2%) within the sludge bed and fixed-film biofilms. 4', 6-diamidino-2-phenylindole (DAPI) staining indicated phosphorus accumulation was biological in nature and mediated through the formation of intracellular inorganic polyphosphate (polyP) granules within these biofilms. DAPI staining further indicated that polyP accumulation was rarely associated with free cells. Efficient and consistent chemical oxygen demand (COD) removal was recorded, throughout the 732-day trial, at applied organic loading rates between 0.4 and 1.5 kg COD m(-3) d(-1) and hydraulic retention times of 8-24 h, while phosphate removal efficiency ranged from 28 to 78% on average per phase. Analysis of protein hydrolysis kinetics and the methanogenic activity profiles of the biomass revealed the development, at 12°C, of active hydrolytic and methanogenic populations. Temporal microbial changes were monitored using Illumina MiSeq analysis of bacterial and archaeal 16S rRNA gene sequences. The dominant bacterial phyla present in the biomass at the conclusion of the trial were the Proteobacteria and Firmicutes and the dominant archaeal genus was Methanosaeta. Trichococcus and Flavobacterium populations, previously associated with low temperature protein degradation, developed in the reactor biomass. The presence of previously characterized polyphosphate accumulating organisms (PAOs) such as Rhodocyclus, Chromatiales, Actinobacter, and Acinetobacter was recorded at low numbers. However, it is unknown as yet if these were responsible for the luxury polyP uptake observed in this system. The possibility of efficient phosphate removal and recovery from wastewater during AD would represent a major advance in the scope for widespread application of anaerobic wastewater treatment technologies.

Indexed as

hybrid reactorLtADmicrobial ecology and physiologyphosphate removalpsychrophilicsewage

Identifiers

PMID26973608
PMCPMC4776080
OpenAlexW2329109571

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.