Evidence map›Paper›PMID 42127525›Full record

ArticleUltrasonics sonochemistry2026

Ultrasound-assisted recovery of humic substances from municipal digestate using response surface methodology.

Shon George Shiju, Krishnakumar Chullipalliyalil, Brijesh K Tiwari, Patrick Quille, Gaurav Rajauria

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Ultrasonics sonochemistry, 2026. 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
–field-weighted citation impact
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.

  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

5 authors.

Shon George ShijuSchool of Microbiology, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland; SUSFERM Centre for Sustainable Fermentation and Bioprocessing Systems for Food and the Bioeconomy, University College Cork, Cork, Ireland.
Krishnakumar ChullipalliyalilCentre for Advanced Photonics and Process Analysis, Munster Technological University, Cork, Ireland.
Brijesh K TiwariDepartment of Food Chemistry and Technology, Teagasc Food Research Centre, Dublin 15, Ireland.
Patrick QuillePlant Biostimulant Group, The Centre for Applied Bioscience Research, Munster Technological University, Tralee, Co. Kerry, Ireland.
Gaurav RajauriaSchool of Microbiology, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland; SUSFERM Centre for Sustainable Fermentation and Bioprocessing Systems for Food and the Bioeconomy, University College Cork, Cork, Ireland. Electronic address: grajauria@ucc.ie.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Anaerobic digestion (AD) is widely employed for sewage sludge stabilization, producing substantial volumes of digestate that require further management. This study explores the recovery of high-quality humic substances (HS), specifically humic acids (HA) and fulvic acids (FA), from anaerobically digested sewage sludge (DSS) using ultrasound-assisted extraction (UAE). Implementing this step prior to downstream digestate management positions DSS as a low-cost, sustainable feedstock to produce high-value agronomic biostimulants and soil conditioners. Response surface methodology (RSM) was applied to optimize the UAE parameters, namely ultrasound amplitude (20-100%) and extraction time (5-20 min), to maximise HA yield. A second-order polynomial model demonstrated a strong fit to the experimental data (R

Indexed as

Chemical FractionationCitiesHumic SubstancesSewageUltrasonic WavesAnaerobiosisBenzopyransBenzopyransfulvic acidHumic SubstancesSewageAnaerobically digested sludgeDigestate valorisationFulvic acidHumic acidSustainable circular systemUrban waste

Identifiers

PMID42127525
PMCPMC13195769

What OpenQuestion holds

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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.