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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Sousa, L. Massaro [1, 2] ; Schulz, C. G. [3] ; Condotta, R. [3] ; Ferreira, M. C. [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Drying Ctr Pastes Suspens & Seeds, Chem Engn Dept, POB 676, BR-13565905 Sao Carlos - Brazil
[2] IFP Energies Nouvelles, Proc Design & Modeling Div, F-69360 Solaize - France
[3] Ctr Univ FEI, Chem Engn Dept, Av Humberto de Alencar Castelo Branco 3972, BR-09850901 Sao Bernardo Do Campo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Food Engineering; v. 300, JUL 2021.
Web of Science Citations: 0
Abstract

Spent 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 <= d(V) <= 583.1 mu m) 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 d(V) 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 degrees to 17.1 degrees 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 d(V) and MC to design effective devices to handle SCGs. (AU)

FAPESP's process: 16/25946-2 - Study on the performance of non-mechanical valves as feeders devices of biomass powders in circulating fluidized beds reactors
Grantee:Lucas Massaro Sousa
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 18/11031-8 - Feeding biomass powders into circulating fluidized bed reactors using non-mechanical devices: a computational fluid dynamics (CFD) analysis
Grantee:Lucas Massaro Sousa
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)