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The Influence of Drying Sewage Sludge with the Addition of Walnut Shells on Changes in the Parameters and Chemical Composition of the Mixture

cris.virtual.author-orcid0000-0001-9954-825X
cris.virtual.author-orcid0000-0002-2610-6116
cris.virtual.author-orcid0000-0003-0989-1586
cris.virtual.author-orcid0000-0001-6775-8076
cris.virtual.author-orcid0000-0002-7649-9720
cris.virtual.author-orcid0000-0002-7750-9265
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid3cdb61fd-4393-4d6f-8ebb-5b044a34bc3d
cris.virtualsource.author-orcid7ed2fddc-9c67-4788-8dfb-b9407163a844
cris.virtualsource.author-orcid54178121-6abb-4c63-95fb-4bae8cfb4d29
cris.virtualsource.author-orcid707fb735-4583-475a-9060-93d1d05b6030
cris.virtualsource.author-orcid3faee269-6dbb-4f3d-84ba-3971b2f06afa
cris.virtualsource.author-orcid723cb16b-5343-4f7e-a53a-308ccdb5aae2
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.abstract.enOne method of preparing sludge for management and use is solar drying. To intensify the drying process, natural lignocellulosic additives can be used to alter the structure of the sludge and accelerate water evaporation. Light, hard materials with low absorption capacity are best suited for this purpose, e.g., walnut shells, which are unused waste. The aim of the study was to determine the impact of the evaluation of walnut shells on the sludge drying process and to assess the impact of the drying process on the chemical, physical, and fuel properties of the additive. The moisture content, crushing strength, chemical composition, and physical and fuel properties of mixtures were determined. A small addition of walnut shells (25%) was found to accelerate the drying process even in winter and spring (up to 30 days) compared to sludge without additives. Walnut shells retain their chemical composition and strength despite unfavourable conditions and a chemically aggressive environment, indicating they may be reused. The mixture containing sewage sludge and walnut shells has a calorific value of 15.6 MJ/kg, which is similar to wood; it is also fully biodegradable and suitable as a fertiliser to improve soil structure, as it contains approx. 80–90% DM (including approx. 40% carbon, 3% nitrogen, and other elements, such as phosphorus and potassium.)
dc.affiliationWydział Inżynierii Środowiska i Inżynierii Mechanicznej
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Inżynierii Wodnej i Sanitarnej
dc.affiliation.instituteKatedra Chemicznej Technologii Drewna
dc.affiliation.instituteKatedra Inżynierii Biosystemów
dc.contributor.authorKujawiak, Sebastian
dc.contributor.authorMakowska, Małgorzata
dc.contributor.authorWaliszewska, Bogusława
dc.contributor.authorJanczak, Damian
dc.contributor.authorBrózdowski, Jakub
dc.contributor.authorCzekała, Wojciech
dc.contributor.authorZyffert, Artur
dc.date.access2024-09-23
dc.date.accessioned2024-10-09T10:17:43Z
dc.date.available2024-10-09T10:17:43Z
dc.date.copyright2024-09-21
dc.date.issued2024
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0.00
dc.description.if3,0
dc.description.number18
dc.description.points140
dc.description.versionfinal_published
dc.description.volume17
dc.identifier.doi10.3390/en17184701
dc.identifier.issn1996-1073
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/1800
dc.identifier.weblinkhttps://www.mdpi.com/1996-1073/17/18/4701
dc.languageen
dc.relation.ispartofEnergies
dc.relation.pagesart. 4701
dc.rightsCC-BY
dc.sciencecloudsend
dc.share.typeOPEN_JOURNAL
dc.subject.ensewage sludge
dc.subject.ensolar drying
dc.subject.enwalnut shells
dc.titleThe Influence of Drying Sewage Sludge with the Addition of Walnut Shells on Changes in the Parameters and Chemical Composition of the Mixture
dc.typeJournalArticle
dspace.entity.typePublication