Abstract
The development of new energy sources has become particularly important from the perspective of energy security and environmental protection. Therefore, the utilization of waste resources such as industrial food wastes (IFWs) in energy production is expected. The central research institute of electric power industry (CRIEPI, Tokyo, Japan) has recently developed an energy-saving oil-extraction technique involving the use of liquefied dimethyl ether (DME), which is an environmentally friendly solvent. In this study, three common IFWs (spent coffee grounds, soybean, and rapeseed cakes) were evaluated with respect to oil yield for biodiesel fuel (BDF) production by the DME extraction method. The coffee grounds were found to contain 16.8% bio-oil, whereas the soybean and rapeseed cakes contained only approximately 0.97% and 2.6% bio-oil, respectively. The recovered oils were qualitatively analysed by gas chromatography-mass spectrometry. The properties of fatty acid methyl esters derived from coffee oil, such as kinematic viscosity, pour point, and higher heating value (HHV), were also determined. Coffee grounds had the highest oil content and could be used as biofuel. In addition, the robust oil extraction capability of DME indicates that it may be a favourable alternative to conventional oil extraction solvents.
Highlights
Much effort has been devoted to developing methods for the production of biodiesel fuel (BDF)from biomass because of increasing concerns related to energy security and environmental protection.Among the resources derived from biomass, the properties of BDF from vegetable oils are well suited for diesel engines [1]
Three oily industrial food wastes (IFWs) were investigated as candidate oil resources for bio-fuel production
The soybean and rapeseed cakes have low oil contents, the results showed that the oil extraction capability of dimethyl ether (DME) is robust
Summary
Much effort has been devoted to developing methods for the production of biodiesel fuel (BDF)from biomass because of increasing concerns related to energy security and environmental protection.Among the resources derived from biomass, the properties of BDF from vegetable oils are well suited for diesel engines [1]. The utilization of aquatic plants such as algae as potential energy sources of bio-fuel has recently attracted particular attention [6]. Aquatic algae have many advantages compared to terrestrial biomass, the production costs of bio-fuel from algae remain a substantial bottleneck to their large-scale use, and their commercial application is still under consideration [7]. Owing to their availability and relatively low costs of production, the effective utilization of current industrial food wastes (IFWs) for the production of BDF is expected [8,9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
