Solar Dryer Application for Olive Oil Mill Wastes
Global waste production has raised recently due to numerous agricultural and industrial activities. Among other actions devoted to waste reduction, revaluation seems to be the most advantageous one from an environmental and economic point of view. In the olive oil sector, by-product management (name...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-12-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/8/12/12415 |
| _version_ | 1798005447103348736 |
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| author | Irene Montero María Teresa Miranda Francisco José Sepúlveda José Ignacio Arranz Carmen Victoria Rojas Sergio Nogales |
| author_facet | Irene Montero María Teresa Miranda Francisco José Sepúlveda José Ignacio Arranz Carmen Victoria Rojas Sergio Nogales |
| author_sort | Irene Montero |
| collection | DOAJ |
| description | Global waste production has raised recently due to numerous agricultural and industrial activities. Among other actions devoted to waste reduction, revaluation seems to be the most advantageous one from an environmental and economic point of view. In the olive oil sector, by-product management (namely olive pomace, olive mill wastewater, and sludge residue) poses serious problems for companies, with the energy use of these wastes being a feasible option to solve these problems. Due to their high moisture content, drying constitutes the main stage for a possible bio-fuel conversion. This research work deals with the analysis of drying for the three main wastes from olive oil by using a prototype dryer. This equipment has different working regimes depending on the kind of convection (natural or forced for passive and active mode, respectively), the incidence of solar radiation on the product (indirect or mixed type) and the use of an additional system for energy supply (hybrid type). From the results, it could be said that all the wastes were suitable for solar drying. However, drying conditions were different for each case. Olive pomace and olive mill wastewater showed promising results for solar drying application in mixed active mode. Concerning sludge residue, its special physical structure could employ the use of turners for drying, in order to improve heat transfer to the product. Moreover, hybrid active mode enabled a considerable reduction in drying time, being an aspect to take into account for its use during low solar radiation or at night time. |
| first_indexed | 2024-04-11T12:39:22Z |
| format | Article |
| id | doaj.art-ee52d24b6959435faa3e2b20c6171e5b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:39:22Z |
| publishDate | 2015-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ee52d24b6959435faa3e2b20c6171e5b2022-12-22T04:23:32ZengMDPI AGEnergies1996-10732015-12-01812140491406310.3390/en81212415en81212415Solar Dryer Application for Olive Oil Mill WastesIrene Montero0María Teresa Miranda1Francisco José Sepúlveda2José Ignacio Arranz3Carmen Victoria Rojas4Sergio Nogales5Department of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainDepartment of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainDepartment of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainDepartment of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainDepartment of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainDepartment of Mechanical Engineering, Energy and Materials, Industrial Engineering School, University of Extremadura, Av. Elvas s/n, 06006 Badajoz, SpainGlobal waste production has raised recently due to numerous agricultural and industrial activities. Among other actions devoted to waste reduction, revaluation seems to be the most advantageous one from an environmental and economic point of view. In the olive oil sector, by-product management (namely olive pomace, olive mill wastewater, and sludge residue) poses serious problems for companies, with the energy use of these wastes being a feasible option to solve these problems. Due to their high moisture content, drying constitutes the main stage for a possible bio-fuel conversion. This research work deals with the analysis of drying for the three main wastes from olive oil by using a prototype dryer. This equipment has different working regimes depending on the kind of convection (natural or forced for passive and active mode, respectively), the incidence of solar radiation on the product (indirect or mixed type) and the use of an additional system for energy supply (hybrid type). From the results, it could be said that all the wastes were suitable for solar drying. However, drying conditions were different for each case. Olive pomace and olive mill wastewater showed promising results for solar drying application in mixed active mode. Concerning sludge residue, its special physical structure could employ the use of turners for drying, in order to improve heat transfer to the product. Moreover, hybrid active mode enabled a considerable reduction in drying time, being an aspect to take into account for its use during low solar radiation or at night time.http://www.mdpi.com/1996-1073/8/12/12415drying kineticsthin layerolive pomaceolive mill wastewatersludge residue |
| spellingShingle | Irene Montero María Teresa Miranda Francisco José Sepúlveda José Ignacio Arranz Carmen Victoria Rojas Sergio Nogales Solar Dryer Application for Olive Oil Mill Wastes Energies drying kinetics thin layer olive pomace olive mill wastewater sludge residue |
| title | Solar Dryer Application for Olive Oil Mill Wastes |
| title_full | Solar Dryer Application for Olive Oil Mill Wastes |
| title_fullStr | Solar Dryer Application for Olive Oil Mill Wastes |
| title_full_unstemmed | Solar Dryer Application for Olive Oil Mill Wastes |
| title_short | Solar Dryer Application for Olive Oil Mill Wastes |
| title_sort | solar dryer application for olive oil mill wastes |
| topic | drying kinetics thin layer olive pomace olive mill wastewater sludge residue |
| url | http://www.mdpi.com/1996-1073/8/12/12415 |
| work_keys_str_mv | AT irenemontero solardryerapplicationforoliveoilmillwastes AT mariateresamiranda solardryerapplicationforoliveoilmillwastes AT franciscojosesepulveda solardryerapplicationforoliveoilmillwastes AT joseignacioarranz solardryerapplicationforoliveoilmillwastes AT carmenvictoriarojas solardryerapplicationforoliveoilmillwastes AT sergionogales solardryerapplicationforoliveoilmillwastes |