Comparison of Oven and Microwave Drying on Extraction of Spent Coffee Grounds Oil
Article Sidebar
Main Article Content
Abstract
Spent coffee grounds (SCG) are frequently disposed of in landfills, which creates significant environmental concerns. Scientists are investigating methods to repurpose SCG, recognizing its potential for various beneficial applications. This study compared oven and microwave drying methods for extracting oil from spent coffee grounds (SCG), focusing on yield and quality of oil. The findings demonstrated that oven drying resulted in a slightly lower moisture content and a significantly higher oil yield (10.01%) compared to microwave drying (8.9%). Additionally, oil from oven-dried SCG exhibited superior quality, with lower acid and peroxide values, indicating less oxidative degradation during the drying process. The structural analysis further supported these results, showing that oven drying better preserved the SCG's cellular structure, which may contribute to the higher retention of oil-bearing compounds. In contrast, microwave drying, while faster, caused more structural damage and led to lower oil yield and reduced quality due to its rapid heating mechanism. This research contributes to the growing body of knowledge on sustainable SCG utilization by highlighting the advantages of oven drying for optimizing oil extraction. The findings are particularly relevant for industries that prioritize oil quality and yield, such as cosmetics and pharmaceuticals.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
How to Cite
References
Toda TA, Visioli PCF, de Oliveira AL, Rodrigues CEC. Conventional and pressurized ethanolic extraction of oil from spent coffee grounds: Kinetics study and evaluation of lipid and defatted solid fractions. J Supercrit Fluid. 2021; 177:105332.
Leow Y, Yew PYM, Chee PL, Loh XJ, Kai D. Recycling of spent coffee grounds for useful extracts and green composites. RSC Adv. 2021; 11(5):2682–2692.
Miladi M, Martins AA, Mata TM, Vegara M, Infantes MP, Remmani R, Canales AR, Gomez DN. Optimization of ultrasound-assisted extraction of spent coffee grounds oil using response surface methodology. Processes. 2021; 9(11):2085.
Vu D. Assessing the differences in phenolics, antioxidant and anti-tyrosinase activities of spent coffee ground fractions. Trop J Nat Prod Res. 2022; 6(4):558-562
Goh BHH, Ong HC, Chong CT, Chen WH, Leong KY, Tan SX, Lee XJ. Ultrasonic assisted oil extraction and biodiesel synthesis of spent coffee ground. Fuel. 2020; 261:116121.
Visak VN, Lee FYL, Tavares MT, Armstrong A. Kinetics of extraction and in situ transesterification of oils from spent coffee grounds. J Env Chem Eng. 2017; 5(3):2611–2616.
Burdo O, Bezbakh I, Shyshov S, Zykov A, Gavrilov A, Vsevolodov O, Sirotyuk I, Terziev S. Experimental studies of the kinetics of infrared drying of spent coffee grounds. Technol Audit Prod Reserves. 2019; 1(1(51)):4–10.
Tran TMK, Kirkman T, Nguyen M, Vuong QV. Effects of drying on physical properties, phenolic compounds and antioxidant capacity of Robusta wet coffee pulp (Coffea canephora). Heliyon. 2020; 6(7):e04498.
Ruhyat N, Ilman Fiqih H, Nurfuad H. Analysis of drying air temperature on moisture content in coffee beans using a fluidized bed dryer with perforated plates. Food Sci Technol. 2022; 5(1):10–21.
Kulapichitr F, Borompichaichartkul C, Suppavorasatit I, Cadwallader KR. Impact of drying process on chemical composition and key aroma components of Arabica coffee. Food Chem. 2019; 291:49–58.
Sa-Adchom P. Drying kinetics and mathematical modeling of spent coffee grounds drying using the spouted bed technique. Eng Appl Sci Res. 2023; 50(4):324–334.
Çelen S. Effect of microwave drying on the drying characteristics, color, microstructure, and thermal properties of Trabzon persimmon. Foods. 2019; 8(2):84.
Chimsook T, Assawarachan R. Effect of drying methods on yield and quality of the avocado oil. Key Eng Mater. 2017; 735:127–131.
Mota DA, Silva APR, Santos JCB, Barbosa M, Almeida LC, Lima ÁS, Pereira MM, Krause LC, Soares CMF. Extraction and characterization of coffee silverskin oil and its valorization by enzymatic hydrolysis. J Bioeng Technol Health. 2021; 4(1):17–23.
Kusmiyati K, Fudholi A. Performance analysis and kinetic modeling of coffee beans in microwave convective dryer integrated photovoltaic system. Math Model Eng Probl. 2022; 9(4):1089–1094.
Kaveh M, Golpour I, Gonçalves JC, Ghafouri S, Guiné R. Determination of drying kinetics, specific energy consumption, shrinkage, and colour properties of pomegranate arils submitted to microwave and convective drying. Open Agric. 2021; 6(1):230–242.
Phitakwinai S, Thepa S, Nilnont W. Thin-layer drying of parchment Arabica coffee by controlling temperature and relative humidity. Food Sci Nutr. 2019; 7(9):2921–2931.
Supardan MD, Misran E, Mahlizar, Satriana, Mustapha WAW. Effect of material length on kinetics of essential oil hydrodistillation from lemongrass (Cymbopogon citratus). J Eng Sci Technol. 2019; 14(2):810–819.
Mofijur M, Kusumo F, Fattah IMR, Mahmudul HM, Rasul MG, Shamsuddin AH, Mahlia TMI. Resource recovery from waste coffee grounds using ultrasonic-assisted technology for bioenergy production. Energies. 2020; 13(7):1770.
Böger BR, Mori ALB, Viegas MC, Benassi MT. Quality attributes of roasted Arabica coffee oil extracted by pressing: Composition, antioxidant activity, sun protection factor and other physical and chemical parameters. Grasas Aceites. 2021; 72(1):1–13.
Bijla L, Aissa R, Bouzid HA, Sakar EH, Ibourki M, Laknifli A, Gharby S. Spent coffee ground oil as a potential alternative for vegetable oil production: Evidence from oil content, lipid profiling, and physicochemical characterization. Biointerface Res Appl Chem. 2022; 12(5):6308–6320.
Panpraneecharoen S, Chumanee S. Optimization of the oil extraction, study the chemical and physical properties of arabica spent coffee grounds. Sci Tech Asia. 2020; 25(4):12–19.
Rosalina Y, Warsiki E, Fauzi AM, Sailah I. Study of anthocyanin extraction from red banana (Musa sapientum L. var Rubra) waste and characteristics of light effects. Sci Technol Indones. 2022; 7(4):522–529.
Erdawati, Nanda EV, Afrizal T, Saputra J, Razak SBA. Green technology for extracting coffee oil and biodiesel production: An application of spent coffee ground management approach. Proceed Int Conf Ind Eng Operat Manag. 2021; 4905–4914.
Luka BS, Mactony MJ, Vihikwagh QM, Oluwasegun TH, Zakka R, Joshua B, Muhammed IB. Microwave-based and convective drying of cabbage (Brassica oleracea L. var capitata L.): Computational intelligence modeling, thermophysical properties, quality and mid-infrared spectrometry. Measurement: Food. 2024; 15:100187.
Karabacak AO. Effects of different drying methods on drying characteristics, colour and in-vitro bioaccessibility of phenolics and antioxidant capacity of blackthorn pestil (leather). Heat Mass Transfer. 2019; 55:2739–2750.