On the design of conical hoppers for spent coffee grounds: Moisture content and particle-size effects

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dc.contributor.authorSOUSA, L. M.
dc.contributor.authorSCHULZ, C. G.
dc.contributor.authorRodrigo Condotta
dc.contributor.authorFERREIRA, M. C.
dc.contributor.authorOrcidhttps://orcid.org/0000-0001-6524-1233
dc.date.accessioned2022-01-12T21:53:54Z
dc.date.available2022-01-12T21:53:54Z
dc.date.issued2021-07-05
dc.description.abstract© 2021 Elsevier LtdSpent coffee ground (SCG) is a food waste with promising potential for reuse in pilot-to-industrial scale processes provided that storage and handling issues are overcome. Here some key bulk and flow properties of SCGs were determined with FT4 rheometer, for powders with different particle-size distribution (249.1 ≤ dV ≤ 583.1 μm) and moisture content (2.8% ≤ MC ≤ 62.5%). These properties were used to evaluate the design of mass-flow silo hoppers following the classical Jenike theory. The SCGs flowability worsened by decreasing dV and increasing MC, with indexes between 1.09 ≤ HR ≤ 1.92 and 2.5 ≤ FF ≤ 15.0. The minimum hopper inclination and outlet diameter ranged from 9.9° to 17.1° and 0.40–1.00 m. A sensitivity analysis for the hopper design was performed, and a densification equation was coupled to Jenike's method to ease future hopper designs for SCGs with different properties. Ultimately, the results showed that careful consideration must be given to dV and MC to design effective devices to handle SCGs.
dc.description.volume300
dc.identifier.citationSOUSA, L. M.; SCHULZ, C. G.; CONDOTTA, R.; FERREIRA, M. C. On the design of conical hoppers for spent coffee grounds: Moisture content and particle-size effects. Journal of Food Engineering, v. 300, jul. 2021.
dc.identifier.doi10.1016/j.jfoodeng.2021.110537
dc.identifier.issn0260-8774
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/3571
dc.relation.ispartofJournal of Food Engineering
dc.rightsAcesso Restrito
dc.subject.otherlanguageBiomass
dc.subject.otherlanguageJenike
dc.subject.otherlanguagePowder handling
dc.subject.otherlanguageRheometer
dc.subject.otherlanguageSilo
dc.titleOn the design of conical hoppers for spent coffee grounds: Moisture content and particle-size effects
dc.typeArtigo
fei.scopus.citations8
fei.scopus.eid2-s2.0-85100971072
fei.scopus.subjectDifferent particle sizes
fei.scopus.subjectFlow properties
fei.scopus.subjectHopper design
fei.scopus.subjectIndustrial scale
fei.scopus.subjectOutlet diameters
fei.scopus.subjectParticle size effect
fei.scopus.subjectSpent coffee grounds
fei.scopus.subjectStorage and handling
fei.scopus.updated2025-01-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85100971072&origin=inward
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