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Modified field method for testing activated sludge condition in chambers with variable wastewater levels

cris.virtual.author-orcid0000-0002-7714-9749
cris.virtualsource.author-orcidc1ffc697-bf57-423f-8744-289bae6f3a38
dc.abstract.enThe paper presents a proposal to modify a field method of testing the condition of activated sludge using a 30-min volume of sludge (settling test). To verify the validity of the modified method of testing the condition of activated sludge, field tests were performed in two onsite wastewater treatment plants. In these plants, the reaction chambers were fed by gravity from the primary sedimentation tank throughout the day. For such treatment plants, the activated sludge condition test varies during a 24-h period. Testing the condition of activated sludge using the modified volume of sludge gives stable results over a 24-h period. To analyse the results, a statistical test was performed to compare the results obtained in the traditional volume of sludge and the modified one. The analysis showed that the results of the sludge volume test are incorrect if the wastewater sample is taken at a time other than the final filling of the bioreactor (just before the sedimentation phase) due to sludge thickening. The proposed modified sludge volume test allows the operator to perform the test at any time of day with a correct result.
dc.affiliationWydział Inżynierii Środowiska i Inżynierii Mechanicznej
dc.affiliation.instituteKatedra Inżynierii Wodnej i Sanitarnej
dc.contributor.authorPawlak, Maciej
dc.date.access2025-03-19
dc.date.accessioned2025-03-19T11:53:34Z
dc.date.available2025-03-19T11:53:34Z
dc.date.copyright2025-01-22
dc.date.issued2025
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_act
dc.description.financecost17958,40
dc.description.if8,0
dc.description.numberFebruary 2025
dc.description.points200
dc.description.versionfinal_published
dc.description.volume375
dc.identifier.doi10.1016/j.jenvman.2025.124190
dc.identifier.eissn1095-8630
dc.identifier.issn0301-4797
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/2603
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S0301479725001665
dc.languageen
dc.pbn.affiliationenvironmental engineering, mining and energy
dc.relation.ispartofJournal of Environmental Management
dc.relation.pagesart. 124190
dc.rightsCC-BY-NC-ND
dc.sciencecloudsend
dc.share.typeOTHER
dc.subject.enonsite wastewater treatment plant
dc.subject.ensequential batch reactor
dc.subject.enSBR
dc.subject.enactivated sludge
dc.subject.ensettled sludge volume
dc.subject.envolume of sludge
dc.subject.plPrzydomowe oczyszczalnia ścieków
dc.subject.plsekwencyjny reaktor wsadowy
dc.subject.plSBR
dc.subject.plosad czynny
dc.subject.plobjętość osadu
dc.titleModified field method for testing activated sludge condition in chambers with variable wastewater levels
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.volume375