Investigating the effect of different loading densities on selected properties of dried coffee using a GHE dryer

Simple item page
dc.contributor.authorMenya, E.
dc.contributor.authorKomakech, A. J.
dc.date.accessioned2023-08-17T08:36:47Z
dc.date.available2023-08-17T08:36:47Z
dc.date.issued2023-09
dc.descriptionThis research was conducted as an undergraduate thesis in partial fulfilment for the award of the degree of BSc. in Agricultural Engineering.en_US
dc.description.abstractDespite coffee being one of the leading cash crops in Uganda contributing 20%-30% of the total export earnings, it is mainly dried on bare earth surfaces hence its drastic decline in quality. A possible alternative solution is the utilization of the greenhouse effect (GHE) solar dryer. This research was aimed at investigating the effect of different loading densities on selected properties of dried coffee using a GHE dryer that was designed and constructed at Makerere University Agricultural Research Institute Kabanyolo (MUARIK). The research involved determining the drying time for the loading densities of 5, 10 and 20 kg m-2 as well as analyzing the coffee quality at the end of the drying period. Three experimental runs were set up in the months of June and July which experienced an average ambient temperature of 23.28 (±2.33)oC and an average dryer temperature of 35.68 (±13.85)oC. The average drying time for the freshly harvested Robusta coffee at 61.3 (±1.36)% wb was 10 days for 5 kg m-2, 11 days for 10 kg m-2 and 12 days for 20 kg m-2. The loading of 20 kg m-2 resulted in an even roast with fair+ for body and flavour, while 5 and 10 kg m-2 loadings resulted in a silver skin roast with fair body and flavour. For this particular research, the loading density of 20 kg m-2 yielded the best results from the coffee quality analysis. The loading densities of 5 kg m-2 and 10 kg m-2 could not yield the best results due to case hardening of the outer surfaces of the coffee beans which compromised the body and flavour of the coffee.en_US
dc.identifier.urihttp://www.cigrjournal.org
dc.identifier.urihttps://hdl.handle.net/20.500.14270/218
dc.language.isoenen_US
dc.publisherCIGR Journalen_US
dc.relation.ispartofseries;Vol. 15, No.3
dc.subjectgreenhouse effecten_US
dc.subjectsolar dryeren_US
dc.subjectloading densitiesen_US
dc.subjectcoffee qualityen_US
dc.subjectdrying timeen_US
dc.titleInvestigating the effect of different loading densities on selected properties of dried coffee using a GHE dryeren_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Investigating the effect of different loading densities on selected.pdf
Size:
156.14 KB
Format:
Adobe Portable Document Format
Description:
Main article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Research Articles