Hydrolysis and methanogenesis in UASB-AnMBR treating municipal wastewater under psychrophilic conditions: Importance of reactor configuration and inoculum

Simple item page
dc.contributor.authorRibera-Pi, Judit
dc.contributor.authorCampitelli, Antonio
dc.contributor.authorBadia-Fabregat, Marina
dc.contributor.authorJubany, Irene
dc.contributor.authorMartínez-Lladó, Xavier
dc.contributor.authorMcAdam, Ewan
dc.contributor.authorJefferson, Bruce
dc.contributor.authorSoares, Ana
dc.date.accessioned2021-01-14T11:01:48Z
dc.date.available2021-01-14T11:01:48Z
dc.date.issued2020-11-02
dc.description.abstractThree upflow anaerobic sludge blanket (UASB) pilot scale reactors with different configurations and inocula: flocculent biomass (F-UASB), flocculent biomass and membrane solids separation (F-AnMBR) and granular biomass and membrane solids separation (G-AnMBR) were operated to compare start-up, solids hydrolysis and effluent quality. The parallel operation of UASBs with these different configurations at low temperatures (9.7 ± 2.4°C) and the low COD content (sCOD 54.1 ± 10.3 mg/L and pCOD 84.1 ± 48.5 mg/L), was novel and not previously reported. A quick start-up was observed for the three reactors and could be attributed to the previous acclimation of the seed sludge to the settled wastewater and to low temperatures. The results obtained for the first 45 days of operation showed that solids management was critical to reach a high effluent quality. Overall, the F-AnMBR showed higher rates of hydrolysis per solid removed (38%) among the three different UASB configurations tested. Flocculent biomass promoted slightly higher hydrolysis than granular biomass. The effluent quality obtained in the F-AnMBR was 38.0 ± 5.9 mg pCOD/L, 0.4 ± 0.9 mg sCOD/L, 9.9 ± 1.3 mg BOD5/L and <1 mg TSS/L. The microbial diversity of the biomass was also assessed. Bacteroidales and Clostridiales were the major bacterial fermenter orders detected and a relative high abundance of syntrophic bacteria was also detected. Additionally, an elevated abundance of sulfate reducing bacteria (SRB) was also identified and was attributed to the low COD/SO42– ratio of the wastewater (0.5). Also, the coexistence of acetoclastic and hydrogenotrophic methanogenesis was suggested. Overall this study demonstrates the suitability of UASB reactors coupled with membrane can achieve a high effluent quality when treating municipal wastewater under psychrophilic temperatures with F-AnMBR promoting slightly higher hydrolysis ratesen_UK
dc.identifier.citationRibera-Pi J, Campitelli A, Badia-Fabregat M, et al., (2020) Hydrolysis and methanogenesis in UASB-AnMBR treating municipal wastewater under psychrophilic conditions: Importance of reactor configuration and inoculum. Frontiers in Bioengineering and Biotechnology, Available online 02 November 2020en_UK
dc.identifier.issn2296-4185
dc.identifier.urihttps://doi.org/10.3389/fbioe.2020.567695
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16178
dc.language.isoenen_UK
dc.publisherFrontiers Mediaen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectmicrobial communityen_UK
dc.subjectupflow anaerobic sludge blanketen_UK
dc.subjectpsychrophilic temperatureen_UK
dc.subjectmunicipal wastewateren_UK
dc.subjecthydrolysisen_UK
dc.subjectanaerobic membrane bioreactoren_UK
dc.titleHydrolysis and methanogenesis in UASB-AnMBR treating municipal wastewater under psychrophilic conditions: Importance of reactor configuration and inoculumen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Hydrolysis_and_methanogenesis_in_UASB-AnMBR_treating_municipal_wastewater-2020.pdf
Size:
5.16 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)