Seasonal variations in acidogenic fermentation of filter primary sludge

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Ossiansson, Elin,1983Chalmers University of Technology,Chalmers tekniska högskola,VA SYD (author)

Seasonal variations in acidogenic fermentation of filter primary sludge

Article/chapterEnglish2023

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2023

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LIBRIS-ID:oai:lup.lub.lu.se:8e43bbef-2f3f-4f5b-97da-718c611650bd
https://lup.lub.lu.se/record/8e43bbef-2f3f-4f5b-97da-718c611650bdURI
https://doi.org/10.1016/j.watres.2023.120181DOI
https://research.chalmers.se/publication/536335URI

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Language:English
Summary in:English

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Primary treatment of municipal wastewater by rotating belt filtration followed by hydrolysis and acidogenic fermentation of the filter primary sludge (FPS) at ambient temperature was studied at pilot-scale during one year. The seasonal variations of volatile fatty acids (VFAs), nutrient release and soluble COD production as well as microbial community assembly were assessed, leading to novel findings for fermentation at ambient temperature. The reproducibility of VFA production performance was first established by operating the two fermentation reactors under the same conditions, showing similar results regarding VFA production and microbial community structure. One year of operation at 5 d retention time (RT) and 16–29 °C resulted in an average VFA yield of 180±35 mg COD/g VSin and soluble COD yield of 242±40 mg COD/g VSin. The VFA formation was temperature-dependent, with ϴ=1.033±0.005 (r=r20·Θ(T−20∘C)). The seasonal variations of the acetic and propionic acid productions were pronounced, whereas the productions of VFAs with longer chains were more stable regardless of temperature. The community structure of the reactor microbiomes was also clearly affected by season and temperature and linked with the production spectrum of VFAs. The ammonium and phosphate releases were stable during the year, leading to a decrease in ratios of soluble COD to NH4+-N and PO43−-P during winter. The soluble COD yield was 11% and 27% higher at 5 d RT compared to 3 and 2 d RT respectively, but the corresponding volumetric productivities were lower. The dissimilarities between microbiomes in influent FPS and fermenters were significant even at a short RT of 2 d, and increased with longer RT of 3 and 5 d, primarily caused by selection of bacteria within Bacteroidota in the fermentation reactors.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Industriell bioteknik Annan industriell bioteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Other Industrial Biotechnology hsv//eng
TEKNIK OCH TEKNOLOGIER Kemiteknik Kemiska processer hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering Chemical Process Engineering hsv//eng
NATURVETENSKAP Kemi Organisk kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Organic Chemistry hsv//eng
TEKNIK OCH TEKNOLOGIER Naturresursteknik Annan naturresursteknik hsv//swe
ENGINEERING AND TECHNOLOGY Environmental Engineering Other Environmental Engineering hsv//eng
Carbon source
Fermentation
Hydrolysis
Primary sludge
Rotating belt filter
Volatile fatty acids
Hydrolysis

Added entries (persons, corporate bodies, meetings, titles ...)

Persson, Frank,1970Chalmers University of Technology,Chalmers tekniska högskola(Swepub:cth)frankp (author)
Bengtsson, SimonVA Syd,VA SYD,Sweden Water Research AB (author)
Cimbritz, MichaelLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)vat-mlj (author)
Gustavsson, David J.I.VA Syd,Sweden Water Research AB,VA SYD (author)
Chalmers University of TechnologyChalmers tekniska högskola (creator_code:org_t)

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In:Water Research2420043-13541879-2448

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