Effect of Coffee Grounds on Physical and Heating Value Properties of Sugarcane Bagasse Pellets
Objective of this research is to study effect of coffee grounds on physical and heating value properties of sugarcane bagasse pellets. The coffee grounds were tested as an additive for pelletizing process of bagasse pellets. Pelletizing was performed using a Flat–die pellet mill machine. Moisture content of raw materials was controlled at 10-13%. Die temperature range during the process was 75-80 oC. Physical characteristics (bulk density and durability) of the bagasse pellet and pellets with 1-5% coffee ground were determined following the standard assigned by the Pellet Fuel Institute (PFI). The results revealed increasing values of 648±3.4, 659 ± 3.1, 679 ± 3.3 and 685 ± 3.1 kg/m3 (for pellet bulk density); and 98.7 ± 0.11, 99.2 ± 0.26, 99.3 ± 0.19 and 99.4 ± 0.07% (for pellet durability), respectively. In addition, the heating values of the coffee ground supplemented pellets (15.9 ± 1.16, 17.0 ± 1.23 and 18.8 ± 1.34 MJ/kg) were improved comparing to the non-supplemented control (14.9 ± 1.14 MJ/kg), respectively. The results indicated that both the bulk density and durability values of the bagasse pellets were increased with the increasing proportion of the coffee ground additive.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3346706Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 184
 N. Kaliyan, and R. V. Morey, “Factor affecting strength and durability of densified biomass products,” Biomass and Bioenergy, vol. 33, pp. 337- 359, Mar. 2009.
 V. B. Agbor, N. Cicek, R. Sparling, A. Berlin, and D. B. Levin, “Biomass pretreatment: Fundamentals toward application,” Biotechnology Advance, vol. 29, pp. 675-685, May. 2011.
 Y. Tsuchiya, and T. Yoshida, “Pelletization of brown coal and rice bran in Indonesia: Characteristics of the mixture pellets including safety during transportation,” Fuel Processing Technology, vol. 156, pp. 68-71, Nov. 2016.
 L. X. Konh, Y. Xiong, S. Tian, and Z. Li, “Intertwining action of addition fiber in preparation of waste sawdust for biofuel pellets,” Biomass & Bioenergy, vol. 59, pp. 151-157, Nov. 2013.
 N. Kaliyan, and R. V. Morey, “Natural binder and solid bridge type binding mechanisms in briquettes and pellets made from corn stover and switchgrass,” Bioresource Technology, vol. 101, pp. 1082-1090. Sep. 2010.
 Z. Liu, B. Mi, Z. Jiang, B. Fei, Z. Cai, and X. Liu, “Improved bulk density of bamboo pellets as biomass for energy,” Renewable Energy, vol. 86, pp. 1-7, Aug. 2015.
 T. Belay, and M. Didwania, “Investigating the effect of mechanical force, feedstock composition and binder ratio on energy content of Solid biomass pellet fuel,” International Journal of Scientific & Engineering Research, vol. 7, pp. 147-151, Jul. 2016.
 B. Emadi, K. L. Iroba, and L. G. Tabil, “Effect of polymer plastic on mechanical, storage and combustion characteristics of terrified and pelletized herbaceous biomass,” Applied Energy, vol. 198, pp.312-319, Dec. 2016.
 C. Kirsten, V. lenz, H. W. Schroder, and J. U. Repke, “Hay pellets-The influence of particle size reduction on their physical-mechanical quality and energy demand during production,” Fuel Processing Technology, vol. 148, pp. 163-174, Mar. 2016.
 M. V. Gil, P. Oulego, M. D. Casal, C. Pevida, J. J. Pis, and F. Rubiera, “Mechanical durability and combustion characteristics of pellets,” Bioresource Technology, vol. 101, pp. 8859-8867. Jun. 2010.
 Thailand Alternative Energy Situation, Department of Alternative Energy Development and Efficiency, Ministry of Energy, 2015.
 Thailand Sugar Annual 2014, Office of the Cane and Sugar Board, Royal Forest Department, Ministry of Natural Resources and Environment, Thailand, 2014.
 C. Y. Yin, “Prediction of higher heating values of biomass from proximate and ultimate analyses,” Fuel, vol. 90, pp. 1128-1132, Dec. 2010.
 L. Wang, G. Skjevrak, J. E. Hustad, M. Gronli, and O. Skreiberg, “Effects of additive on barley straw and husk ashes sintering characteristics,” Energy Procedia, vol. 59, pp. 30-39, 2012.
 B. J. Ahn, H. Chang, S. M. Lee, D. H. Coi, and S. T. Cho, “Effect of binder on the durability of wood pellets fabricated from Larix kaemferi C. and Liriodendron tulipifera L. sawdust,” Renewable Energy, vol. 62, pp. 18-23, Jul. 2013.
 J. Berghel, S. Frodeson, K. Granstom, R. Renstrom, M. Stahl, D. Nordgren., and P. Tomani, “The effects of Kraft lingnin additives on wood fuel pellet quality, energy use and shelf life,” Fuel Processing Technology, vol. 112, pp. 64-69, Mar.2013.
 N. Misljenvic, R. Colovic, D. Vukmirovie, T. Brlek, and C. S. Bringas, “The effects of sugar beet molasses on wheat straw pelleting and pellet quality. A comparative study of pelleting by using a single pellet press and a pilot-scale pellet press,” Fuel Processing Technology, vol. 114, pp. 220-229, Jan. 2016.
 S. Poddar, M. Kamruzzaman, S. M. A. Sujan, M. Hossain, M. S. Jamal, M. A. Gafur, and M. Khanam, “Effect of compression pressure on lignocellulosic biomass pellet to improve fuel properties: Higher heating value,” Fuel, vol. 131, pp. 43-48. Sep. 2014.
 J. P. Carroll, and J. M. Finnan, “The use of additives and fuel blending of reduce emission from the combustion of agricultural fuels in small scale boilers,” Biosystems Engineering, vol. 129, pp. 127-133. Oct. 2014.
 C. Serrano, E. Monedero, M. Lapuerta, and H. Portero, “Effect of moisture content, particle size and pine addition on quality parameter of barley straw pellets,” Fuel Processing Technology, vol. 92, pp. 699-706., Dec. 2011.
 ASTM Standards: ASTM E 873-82., Standard Test Method for Bulk Density of Densified Particulate Biomass Fuels, 2013.