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Ohmic heating assisted hydrodistillation of clove essential oil

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  • SDG 7 · Erişilebilir ve Temiz Enerji

Özet

Ohmic heating assisted hydrodistillation is a novel green technology for the extraction of essential oils. In this study, clove bud essential oils (CEO) were extracted by ohmic heating assisted hydrodistillation (OAHD) and compared with conventional hydrodistillation (HD) process, in terms of extraction yield, energy consumption and chemical properties. Ohmic heating assisted hydrodistillation process conditions were optimized by response surface methodology. Voltage gradient (7.5–12.5 V/cm, A), process time (30–120 minutes, B) and mass of clove bud (20–40 g, C) were varied in order to maximize CEO yield and to minimize energy consumption. Optimized extraction conditions were determined as, 12.5 V/cm voltage gradient, 97.967 min for process time and 40 g of mass of clove bud. Yield of CEO and energy consumption were found 13.18 ± 1.50% and 0.214 ± 0.030 kW h/g CEO at optimum extraction conditions, respectively. Under optimum conditions, both OAHD and HD methods were used for CEO extraction. Yields of CEO obtained by OAHD, HD-D (distilled water) and HD-S (salted water) were 13.18 ± 1.50, 8.23 ± 0.35 and 7.88 ± 0.60 respectively. Energy consumptions of OAHD and HD methods were not significantly different (P > 0.05). The main chemical component of CEO was eugenol and the yield of eugenol (g/100 g clove bud) was found higher with OAHD (6.95±0.6) method than HD-D (5.16 ± 0.20) and HD-S (5.13 ± 0.28). Antioxidant and antimicrobial properties of CEOs were investigated by FRAP, DPPH and disk diffusion method. Antioxidant properties of CEOs obtained by different extraction methods were not significantly different (P > 0.05) according to FRAP and DPPH analysis. Although inhibition zones of CEOs extracted with different methods were not significantly different (P > 0.05) for gram positive bacteria's, CEO obtained by OAHD and HD-D have significantly higher (P < 0.05) inhibition zones for K. pneumonia and E. coli, respectively. The results of this study showed that OAHD method is applicable for CEO production.

Anahtar Kelimeler

Clove budEssential oilHydrodistillationOhmic assisted hydrodistillation
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Tam Kayıt
AlanDeğerDil
dc.contributor.authorTunç, Merve Tuğçe
dc.contributor.authorKoca, İlkay
dc.date.accessioned2026-10-22T10:20:39.540825861Z
dc.date.available2026-10-22T10:20:39.540825861Z
dc.date.issued2019
dc.description.abstractOhmic heating assisted hydrodistillation is a novel green technology for the extraction of essential oils. In this study, clove bud essential oils (CEO) were extracted by ohmic heating assisted hydrodistillation (OAHD) and compared with conventional hydrodistillation (HD) process, in terms of extraction yield, energy consumption and chemical properties. Ohmic heating assisted hydrodistillation process conditions were optimized by response surface methodology. Voltage gradient (7.5–12.5 V/cm, A), process time (30–120 minutes, B) and mass of clove bud (20–40 g, C) were varied in order to maximize CEO yield and to minimize energy consumption. Optimized extraction conditions were determined as, 12.5 V/cm voltage gradient, 97.967 min for process time and 40 g of mass of clove bud. Yield of CEO and energy consumption were found 13.18 ± 1.50% and 0.214 ± 0.030 kW h/g CEO at optimum extraction conditions, respectively. Under optimum conditions, both OAHD and HD methods were used for CEO extraction. Yields of CEO obtained by OAHD, HD-D (distilled water) and HD-S (salted water) were 13.18 ± 1.50, 8.23 ± 0.35 and 7.88 ± 0.60 respectively. Energy consumptions of OAHD and HD methods were not significantly different (P > 0.05). The main chemical component of CEO was eugenol and the yield of eugenol (g/100 g clove bud) was found higher with OAHD (6.95±0.6) method than HD-D (5.16 ± 0.20) and HD-S (5.13 ± 0.28). Antioxidant and antimicrobial properties of CEOs were investigated by FRAP, DPPH and disk diffusion method. Antioxidant properties of CEOs obtained by different extraction methods were not significantly different (P > 0.05) according to FRAP and DPPH analysis. Although inhibition zones of CEOs extracted with different methods were not significantly different (P > 0.05) for gram positive bacteria's, CEO obtained by OAHD and HD-D have significantly higher (P < 0.05) inhibition zones for K. pneumonia and E. coli, respectively. The results of this study showed that OAHD method is applicable for CEO production.
dc.description.sponsorshipOndokuz Mayıs University, (PYO.MUH.1904.18.022)
dc.identifier.articlenumber111763
dc.identifier.doi10.1016/j.indcrop.2019.111763
dc.identifier.eissn1872-633X
dc.identifier.issn0926-6690
dc.identifier.scopus2-s2.0-85072390756
dc.identifier.urihttps://rdlopen.rawdatalibrary.net/r/gumushane/12879
dc.identifier.volume141
dc.identifier.wosWOS:000496611800003
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofIndustrial Crops and Products
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectClove bud
dc.subjectEssential oil
dc.subjectHydrodistillation
dc.subjectOhmic assisted hydrodistillation
dc.subject.classificationAgricultural Engineering
dc.subject.classificationAgronomy
dc.subject.classificationAgriculture
dc.subject.otherPosibacteria
dc.subject.otherSyzygium aromaticum
dc.subject.otherAntioxidants
dc.subject.otherEnergy utilization
dc.subject.otherEscherichia coli
dc.subject.otherEssential oils
dc.subject.otherHeating
dc.subject.otherAnti-microbial properties
dc.subject.otherAntioxidant properties
dc.subject.otherClove bud
dc.subject.otherGram-positive bacterium
dc.subject.otherHydrodistillations
dc.subject.otherOhmic-assisted hydrodistillation
dc.subject.otherOptimum extraction conditions
dc.subject.otherResponse surface methodology
dc.subject.othercoliform bacterium
dc.subject.otherdistillation
dc.subject.otheressential oil
dc.subject.otherevergreen tree
dc.subject.otherextraction method
dc.subject.otherinhibition
dc.subject.otheroptimization
dc.subject.otherpneumonia
dc.subject.otherExtraction
dc.titleOhmic heating assisted hydrodistillation of clove essential oil
dc.typeArticle
dspace.entity.typePublication
rdl.citation.openalex90
rdl.citation.scopus87
rdl.citation.wos66
rdl.oa.statusclosed
rdl.sdgSDG07
rdl.source.indexSCOPUS
rdl.source.indexWOS
rdl.wos.indexScience Citation Index Expanded (SCI-EXPANDED)