Preliminary Results on the Influence of Carbonic Snow Addition during the Olive Processing: Oil Extraction Yield and Elemental Profile

2014 ◽  
Vol 04 (02) ◽  
Author(s):  
Zappa G Venturi F
2013 ◽  
Vol 44 ◽  
pp. 549-557 ◽  
Author(s):  
Pascale Jolivet ◽  
Carine Deruyffelaere ◽  
Céline Boulard ◽  
Alain Quinsac ◽  
Raphaëlle Savoire ◽  
...  

2017 ◽  
Vol 32 (3) ◽  
pp. 295 ◽  
Author(s):  
Silas Da Silva Santos ◽  
Marco Antonio Martin Biaggioni ◽  
Maria Márcia Pereira Sartori ◽  
Iara Maria Casarini Monteiro ◽  
Ivan Fernandes De Souza

A prensagem mecânica é o método mais empregado para extração do óleo de diversos tipos de oleaginosas, constituindo-se em uma operação simples que não exige mão de obra qualificada e facilmente adaptável a diversos tipos de grãos. Entretanto, as prensas contínuas com pequena capacidade, tem um grande potencial de utilização nas pequenas comunidades rurais, apresentam baixa eficiência de extração, deixando uma quantidade significativa de óleo na torta. A operação de retirada das cascas dos frutos de crambe, antes da prensagem, constitui-se em um fator importante que pode otimizar a extração mecânica do óleo de crambe, reduzindo o teor de óleo que se perde pelo processamento do grão com casca. O objetivo deste trabalho foi avaliar o rendimento de óleo de crambe extraído mecanicamente, contendo diferentes percentagens de retirada de casca. Foram realizados os testes de rendimento de extração do óleo pelo método mecânico de prensagem a frio, a partir do crambe submetido aos seguintes tratamentos de descasque: grãos sem casca, grãos com 10% de casca, grãos com 20% de casca e grãos com casca (controle). Para avaliar o efeito do descasque foi utilizado um delineamento experimental inteiramente casualizado, com quatro tratamentos e quatro repetições. Os resultados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Os resultados obtidos neste trabalho permitiram observar o efeito positivo e significativo do descasque dos grãos sobre a extração do óleo de crambe, atingindo o máximo rendimento com a ausência de casca.PALAVRAS-CHAVE: crambe, descasque, rendimento de extração, prensagem mecânica, eficiência de extração. DEHULLING PROCESS OF CRAMBE [Crambe Hyspanica subesp. Abyssinica (Hochst. ex R.  E. Fr.) PRINA] AIMING TO OIL EXTRACTIONABSTRACT: The mechanical screw pressing (expeller) is the method most commonly used for extracting oil from various types of oilseeds, constituting of a simple operation that requires no skilled labor and is easily adaptable to various types of grain. However, continuous presses with small capacity have great potential of use in small rural communities, and have low extraction efficiency, leaving a significant amount of oil in the crambe cake. To remove the hull from crambe fruits before pressing is an important factor that can optimize the mechanical extraction of crambe oil, reducing oil waste. The purpose of this work was to evaluate the yield of mechanically extracted oil from crambe fruits containing different percentages of hull. The oil extraction yield tests were performed by the cold pressing method, submitting the crambe to the following hulling treatments: totally dehulled, partially dehulled with 10% hull, partially dehulled with 20% hull, and whole grains (control). To evaluate the dehulling effect, a completely randomized experimental design was used, with four treatments and four replications.  The results were submitted to analysis of variance and the averages were compared by the Tukey’s test at 5% probability.  The results obtained in this work allowed observing the positive and significant effect of hulling to crambe oil extraction. The absence of hull resulted on maximum yield of oil extracted.KEYWORDS: crambe, dehulling, extraction yield, mechanical pressing, extraction efficiency.


Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 62 ◽  
Author(s):  
Hui Hu ◽  
Hongzhi Liu ◽  
Aimin Shi ◽  
Li Liu ◽  
Marie Fauconnier ◽  
...  

The purpose of the present study is to investigate the changes in extraction yield, physicochemical properties, micronutrients content, oxidative stability and flavor quality of cold pressed peanut oil extracted from microwave (MW) treated seeds (0, 1, 2, 3, 4, 5 min, 700 W). The acid value and peroxide value of extracted oil from MW-treated peanuts were slightly increased but far below the limit in the Codex standard. Compared with the untreated sample, a significant (p < 0.05) increase in extraction yield (by 33.75%), free phytosterols content (by 32.83%), free tocopherols content (by 51.36%) and induction period (by 168.93%) of oil extracted from 5 min MW-treated peanut were observed. MW pretreatment formed pyrazines which contribute to improving the nutty and roasty flavor of oil. In conclusion, MW pretreatment is a feasible method to improve the oil extraction yield and obtain the cold pressed peanut oil with longer shelf life and better flavor.


2019 ◽  
Vol 797 ◽  
pp. 202-210
Author(s):  
Sulaiman Ngadiran ◽  
Ida Idayu Muhamad ◽  
Ramlan Aziz ◽  
Harisun Yaakob ◽  
Nor Farahiyah Aman Nor ◽  
...  

Gaharu oleoresin is a mixture of wood resin and essential oil substances that naturally accumulates in the gaharu plants species. The aim of this study was to determine the appropriate solvent types and the contents of oleoresin and oil as well as the chemical compounds present in the gaharu extracts. Gaharu oleoresin can be extracted from gaharu powder using polar solvents and the essential oil can be separated using non-polar solvents. The extraction was done by Soxhlet method using methanol and ethanol for oleoresin extraction, and n-hexane and toluene for oil extraction from which the most appropriate solvents, extraction yields and the extracts quality were determined. The percentage of oleoresin extraction yield was found highest in methanol (6.97 %) followed by ethanol (6.85 % w/w). Meanwhile, the gaharu oil was found higher in toluene extract (1.06 %) compared to n-hexane (0.38 % w/w). The GC-MS results showed the extracts from ethanol and n-hexane solvents are the best quality due to the present of key compounds of 4-phenyl-2-butanone, β-guaiene, agarospirol, α–bisabolene, alloaromadendrene oxide, γ-Gurjunen and aromadenderene oxide. Different chemical component in gaharu oil determines the characteristic or quality of the gaharu. Meanwhile, the sesquiterpene compounds in gaharu produce its specialty aroma characteristics. Therefore, ethanol and n-hexane solvents are suitable to be used for oleoresin and oil extraction beside less expensive and more environmental-friendly.


2011 ◽  
Vol 90 (6) ◽  
pp. 2027-2036 ◽  
Author(s):  
Ahmad Marasabessy ◽  
Maelita R. Moeis ◽  
Johan P. M. Sanders ◽  
Ruud A. Weusthuis

2013 ◽  
Vol 12 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Jesús Rodríguez-Miranda ◽  
Betsabé Hernández-Santos ◽  
Erasmo Herman-Lara ◽  
Carlos A. Gómez-Aldapa ◽  
Hugo S. Garcia ◽  
...  

2018 ◽  
pp. 59-74
Author(s):  
Csaba András ◽  
Bernadett Salamon ◽  
Éva György ◽  
Emőke Mihok ◽  
Alexandru Szép

Essential oil extraction of wild caraway and thyme was performed using a classical (HD) and microwave hydro-distillation (MWHD) and a laboratory supercritical fluid extraction (SFE) with a carbon dioxide as solvent. Our experiments demonstrated that the extraction yield of the essential oil performed in same conditions was influenced by the location of growth area; the maximum extraction yield of 10 ml 100 g-1 caraway was obtained from dried seeds collected from Csíkmadaras. This quantity far exceeded the yield of the Újtusnád samples. In the case of wild caraway (Carum carvi L.), the extraction method influenced thecomposition of the essential oil (carvone/limonene ratio), the highest limonene content being achieved by classical hydro-distillation. In the case of thyme, this effect was not detected, the thymol/carvacrol ratio was independent from the given extraction method. The obtained thyme essential oil possesses high antimicrobial activity demonstrated by agar diffusion test. The thyme extract provides a good protection against microorganisms collected on the surface of fresh vegetables following bacterial stains: Citrobacter portucalensis, Pseudomonas hunanensis, Pseudomonas baetica, Pseudomonas parafulva, Bacillus mojavensis and Enterobacter cloacae. Protective effect was also detected on the vegetable surface of by chitosan-based edible film coating during a 6-day-long storage period at a temperature of 4 °C. The caraway essential oil used as soft cheese seasoning with a direct, dilution-free method, proved to be unsuitable because the uneven distribution and confer a strong, unpleasant taste to the product in comparison with the ground wild caraway seed-dressed cheese.


2020 ◽  
Vol 10 (2) ◽  
pp. 144-153
Author(s):  
Fatih Kaya ◽  
Ahmet Özer

Objective: In this study, the extraction of oil from Pistacia terebinthus L’s seeds grown in Elazig-TURKEY and called menengic in domestic region was investigated. Crude oil content of the seeds obtained from this region was determined as approximately 47% (w/w). Methods: Effects of the parameters such as extraction time, temperature, seeds/solvent ratio (dosage), the particle size of seeds and type of solvent were examined on the oil extraction yield. In this context, it has concluded that up to a certain point, the extraction time has increased the yield of oil extracted. But the extraction temperature showed activity as depending on the solvent type. Results: As expected, it has been observed that the yield of oil has decreased depending on the increase in particle size and dosage as well. The mathematical model obtained by solving Fick's second law under the appropriate boundary and initial conditions were used to calculate diffusion coefficients for the extraction process. Diffusion coefficients for the seeds with a particle size of 0.55 mm were found to be between 1.15x10-11 and 1.86x10-11 m2s-1. To compare the extraction yield of Pistacia terebinthus L’s seeds with that of sunflower at the same conditions, the diffusion coefficients of sunflower seeds were calculated in the range of 9.11x10-12 and 1.13x10-11 m2s-1. Conclusion: These figures show that the diffusion coefficients calculated for both oily seeds are nearly equivalent to each other. The fatty acid composition of extracted oil from Pistacia terebinthus L’s seeds was determined by GC-FID. The GC-FID results showed that oleic, linoleic (ω-6) and palmitic acid were main fatty acids in the oil obtained from menengic seeds.


Sign in / Sign up

Export Citation Format

Share Document