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A pilot-scale evaluation of residual sludge quality in a worm-sludge treatment reed bed in the Mediterranean region

2024-11Journal article Open access
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dc.contributor.authorGholipour, Amir
dc.contributor.authorFragoso, Rita
dc.contributor.authorGalvão, Ana
dc.contributor.authorDuarte, Elizabeth
dc.date.accessioned2025-08-14T09:33:02Z
dc.date.available2025-08-14T09:33:02Z
dc.date.issued2024-11
dc.description.abstractA pilot-scale study on sludge treatment reed beds investigated the combined effects of earthworms and Arundo donax on sewage sludge dewatering and residual sludge quality. Four units were tested: one planted with earthworms, one planted without earthworms, one unplanted with earthworms, and one control, each unit replicated. Over a year, 24 cycles of sludge (dry and volatile solid contents of 24.71 g.L 1, and 19.14 g.L 1) were fed onto the units at a sludge loading rate: 43.59 kg.DS.m 2.year 1. Afterward, the units experienced 132 days of resting period, increasing dry solids from 21 to 70 % and decreasing volatile solids from 81 to 69 % on average (40 % sludge volume reduction). The bottom layers of the planted unit with earthworms showed a 30 % reduction in volatile solids, indicating improved sludge stabilization. Macronutrient abundance in the residual sludge followed the sequence N > Ca > P > K > S > Mg. The planted unit with earthworms reduced micro- nutrient concentrations by 22 % compared to the control unit (Fe > Na > Mn > B > Mo). Earthworms also played a key role in reducing heavy metal concentrations by 11 % compared to the planted unit without earthworms (Zn > Cr > Pb > Ni > Cd). Heavy metal levels in the residual sludge met EU and Portugal standards, with a 99.9 % reduction in Escherichia coli and fecal coliforms. Cost estimation showed centrifugation and W-STRB scenarios cost 167 and 183 €.PE 1 for a ten-year operation, with O&M costs of 7 and 3 €.PE 1.year 1, respectivelypt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGholipour, Amir, et al. «A Pilot-Scale Evaluation of Residual Sludge Quality in a Worm-Sludge Treatment Reed Bed in the Mediterranean Region». Journal of Environmental Management, vol. 370, novembro de 2024, p. 122772. https://doi.org/10.1016/j.jenvman.2024.122772.pt_PT
dc.identifier.doi10.1016/j.jenvman.2024.122772pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/102867
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.elsevier.com/locate/jenvmanpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectEisenia fetidapt_PT
dc.subjectSewage sludgept_PT
dc.subjectConstructed wetlandpt_PT
dc.subjectArundo donaxpt_PT
dc.subjectCost assessmentpt_PT
dc.titleA pilot-scale evaluation of residual sludge quality in a worm-sludge treatment reed bed in the Mediterranean regionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage122772pt_PT
oaire.citation.titleJournal of Environmental Managementpt_PT
oaire.citation.volume370pt_PT
person.familyNameGholipour
person.familyNameAmaral Fragoso
person.givenNameAmir
person.givenNameRita
person.identifierhttps://scholar.google.com/citations?hl=en&user=XhYtWL0AAAAJ
person.identifier.ciencia-id281B-F2D9-8E6F
person.identifier.ciencia-id3515-DA5A-45A4
person.identifier.orcid0000-0002-1566-4905
person.identifier.orcid0000-0003-2957-7340
person.identifier.scopus-author-id57209825719
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication52ed481c-3fa6-47a8-bf20-9530d5d9727f
relation.isAuthorOfPublication1ee56641-85c3-4128-b016-984c18c3ebaa
relation.isAuthorOfPublication.latestForDiscovery1ee56641-85c3-4128-b016-984c18c3ebaa

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