spent coffee grounds the locker room.pptx

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1. DAYANANDA SAGAR ACADEMY OF TECHNOLOGY AND MANAGEMENT 22 MILE, BM KAVAL, UDAYAPURA, KANAKAPURA ROAD, BANGALORE DEPARTMENT OF CIVIL ENGINEERING SEMINAR ON CONVERSION OF SPENT COFFEE GROUNDS INTO RENEWABLE ENERGY Guide : CHAITRA V Dr. K N VISHWANATH 1DT20CV401 Prof. & Head Department of Civil Engineering Department of Civil Engineering DSTM DSATM Department of Civil Engineering 1

2. CONTENTS 2 Introduction Various methods of extracting oil Soxhlet extraction method Response surface method Articles Discussion Reference Department of Civil Engineering

3. INTRODUCTION 3 "Spent coffee grounds" refers to the leftover coffee grounds that have already been used to make coffee. Renewable energy refers to energy produced from natural resources that can be replenished in a relatively short time without exhausting limited natural resources or harming the environment. Biodiesel is an excellent substitute for fossil fuels. However, biodiesel is more expensive than fossil fuel, so its use is limited. Department of Civil Engineering

4. VARIOUS METHODS OF EXTRACTING OIL 4 There are several methods for extraction of the oil from spent coffee grounds 1. Soxhlet extraction method 2. Response surface method RESPONSE SURFACE METHOD SOXHLET EXTRACTION METHOD Department of Civil Engineering

5. Soxhlet extraction method 5 Principle It is a continuous solid/liquid extractor. Solid is placed in thimble. Thimble is made of material which will contain solid but allow liquids to pass through like filter paper. Department of Civil Engineering

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7. Procedure 7 Dried in oven at 104C. Taken 10 gms of dried SCG. Hexane vapors travels up and condenses back to liquid in cooled at top. Dissolves coffee oil. Goes back to bottom flask. The process is repeated to condense vapor. Department of Civil Engineering

8. Response surface method 8 Principle Magnetic stirring is widely used method on liquid media for stirring and mixing. Used over broad temperature range and with any chemical agent, as well as open and closed systems, under pressure or vacuum. Department of Civil Engineering

9. Procedure 9 DISTILLATION PROCESS HEXANE WITH COFFEE OIL Department of Civil Engineering

10. 10 Ratio of DSCG to hexane are varied. Magnetic bar is put into flask. In extraction process DSCG is mixed with solvent by magnetic stirrer at room temperature. After extracting oil, OFSCG will fall to bottom flask and solution is on the top layer. Suspensions are filtered by filter paper to separate OFSCG and solutions. Hexane-to-coffee oils are stilled by simple distillation process to remove hexane. In final process coffee oil will be heated to remove residual hexane left in coffee oil. Department of Civil Engineering

11. ARTICLES 11 Konstantinous Passadis et al. (2020) studied that Soxhlet method was selected as an extraction technique for oils and fats, and the ratio of solvent to raw material were investigated. Two distinct solvents methanol , and hexane , were examined. Hexane has been shown to be a more effective solvent with oil extraction yields ranging from 73.15 to 97.21%. A.E. Atabani et al. (2017) extraction of oil from used coffee grounds with the Soxhlet system gave a simple extraction of 26.4% . 21.5 wt% oil was extracted with hexane/isopropanol (50:50, v/v), while 21.0 wt% oil was extracted with isopropanol. Department of Civil Engineering

12. 12 Nidia S. Caetano et al. (2014) the experimental study was performed using different solvents, which showed that up to 6 wt% lipid content was obtained from SCG. SCG can be used as a fertilizer because it is rich in nitrogen . A. Deligiannis et al. (2011) in this study the oil content of the ground coffee used was 15% of the dry weight . This can result in lower operating costs compared to other oilseeds . The coffee oil has been extracted and chemically modified. Coffee oil is converted into biodiesel with high yield. Department of Civil Engineering

13. Department of Civil Engineering 13 Mebrahtu Haile (2014) They aimed to find out the possibilities of using used coffee grounds in the production of biodiesel and its by-products for the production of pellet fuel , which is expected to help the biodiesel production process to reach zero waste . The coffee grounds used in this experiment were tested collected from Kaldis Coffee, Addis Ababa, Ethiopia . The oil from the spent coffee powder was then extracted using hexane, ether, and a mixture of isopropanol and hexane (50:50% by volume), resulting in oil yields of 15.6, 17.5, and 21.5% by weight, respectively.

14. DISCUSSION 14 Used coffee grounds can be turned into a potential source of biodiesel and its by-products. Oil extraction with a mixture of SCG/hexane, which has relatively low cost and high oil recovery, has been switched to biodiesel. Solid waste after oil production serves as raw material for fuel pellets. Solid waste production after oil extraction can also facilitate a zero-waste approach to the biodiesel production process. Department of Civil Engineering

15. REFERENCES 15 A. Deligiannis, A. G. (2011). Waste Coffee Grounds as an Energy Feedstock. Academia . A.E. Atabani, S. M.-M. (2018). Valorization of spent coffee grounds recycling as a potential alternative fuel resource in Turkey: An experimental study. Journal of the Air & Waste Management Association. Haile, M. (2014). Integrated volarization of spent coffee grounds to biofuels. Biofuel Research Journal . Konstantinos Passadis, V. F. (2020). Study of Valorisation Routes of Spent Coffee Grounds. Waste and Biomass Valorization . Nidia S. Caetano, V. F. (2014). Spent coffee grounds for biodiesel production and other applications. Clean Technologies and Environmental Policy . Department of Civil Engineering

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