BIOFUELS AS PROMISING FUELS
The use of fossil fuels results in global warming and pollution. In comparison with fossil fuels biofuels represent an eco-friendly, biodegradable, sustainable, cost-competitive and promising alternative energy source. They contain high energy content and do not contribute to greenhouse effect. Therefore, using cheap or renewable resources as the feedstock for biofuels production has a great potential in terms of a major contribution to future energy supply. The production and use of biofuels is already well established and a further promotion of these fuels such as lipid biofuels (bioethanol, pure plant oils and biodiesel) and gas biofuels (biomethane, biohydrogen) mainly depends on non-technical issues, such as policies and cost–effectiveness. Biofuels will definitely stay for the foreseeable future and still can continue to provide the earth and the human population with a relatively clean source of energy with several benefits such as economic benefits of providing employment and health benefits of reduced carbon emissions, leading to cleaner air. With increasing sophistication of technology and intense research and development done, one can safely infer that biofuel will become more appealing and applicable for use on a globally commercial level. As such, biofuel is acknowledged as the Earth’s future energy source. Until a newer and cleaner energy source is discovered, scientists will definitely persist in researching and enhancing biofuels to make them more cost-effective, while still being environmentally friendly.
V. Mićić, V. Aleksić, V. Damjanović, Possibilities of Production of Bioethanol as an Alternative Fuel, [Na srpskom: Mogućnosti proiz-vodnje bioetanola kao alternativnog goriva], Faculty of Technology of Istočno Sarajevo University, 2013, 3−8.
D. Ivetić, M. Antonov, Environmental management through fossil fuels replacement- global and local potential of agricultural waste for bioethanol production, Reporting for sustainability, 2013, Becici, Montenegro, 191–196.
S. T. Merino, J. Cherry, Progress and Challenges in Enzyme Development for Biomass Utilization, Adv. Biochem Engin/Biotechnol, Vol. 108 (2007) 95–120.
L. Mojović, D. Pejin, O. Grujić, S. Mar-kov, J. Pejin, M. Rakin, M. Vukašinović, S. Nikolić, D. Savić, Progress in the production of bioethanol on starch-based feedstocks, Chem. Ind. Chem. Eng. Q., Vol. 15 (2009) 221–226.
S. Kim, B. E. Dale, Environmental aspects of ethanol derived from no-tilled corn grain: Nonrenewable energy consumption and greenhouse gas emissions, Biomass Bioenergy, Vol. 28 (2005) 475–489.
F. Taheripour, T. W. Hertel, W. E. Tyner, J. F. Beckman, D. K. Birur, Biofuels and their byproducts- Global economic and environmental implications, American Agricultural Economics Association Meeting, Orlando, FL, 2008, 43−51.
F. J. Kaltner, G. F. D. Azevedo, I. A. Campos, A. O. F. Mundim, Liquid Biofuels for Transportation in Brazil, Potential and Implications for Sustainable Agriculture and Energy in the 21st century, 2004, http://www. fbds.org.br/IMG/pdf/doc-116.pdf
I. C. Macedo, M. R. L. V. Leal, J. E. A. R. Dasilva, Greenhouse Gas (GHG) Emissions in the Production and Use of Ethanol in Brazil - Present Situation, Prepared for the Secretariat of the State of São Paulo, 2006, http://www.senternovem.nl/mmfiles/135550_tcm24-124345.pdf
N.Paul, D. Kemnitz, Biofuels – Plants, Raw Materials, Products. – Fachagentur Nachwachsende Rohstoffe e.V. (FNR), WPR Communication, Berlin 2006, 34−38.
M. Mittelbach, C. Remschmidt, Biodie-sel, The Comprehensive Handbook, Boersendruck Ges.m.b.H., Vienna 2004, 26−29.
F. Ma, M.A. Hanna, Biodiesel produc-tion, Bioresource Technology, Vol. 70(1) (1999) 1−15.
G. Guan, K. Kusakabe, N. Sakurai, K. Moriyama, Transesterification of vegetable oil to biodiesel fuel using acid catalysts in the presence of dimethyl ether, Fuel, Vol. 88(1) (2009) 81−86.
WWI (Worldwatch Institute), Biofuels for Transportation, Global Potential and Implica-tions for Sustainable Agriculture and Energy in the 21st Century, Submitted Report prepared for BMELV in cooperation with GTZ and FNR, 2006, 12−18.
Z. Qiu, L. Zhao, L. Weatherley, Process intensification technologies in continuous biodiesel production, Chemical Engineering and Processing, Vol. 49−9, (2010) 323–330.
J. Sheehan, V. Camobreco, J. Duffield, M. Graboski, H. Shapouri, An Overview of Biodiesel and Petroleum Diesel Life Cycles, A Joint Study sponsored by the U.S. Department of Agriculture and the U.S. Department of Energy, 1998, 47.
EPA (U.S. Environmental Protection Agency), A Comprehensive Analysis of Biodiesel Impacts on Exhaust Emissions, Draft Technical Report EPA420-P-02-001, 2002, 118.
S. Prechtl, M. Faulstich, Biogas production from substrates with high amounts of organic nitrogen, ATZ Entwicklungszentrum, 2004, 24-26
F. Scholwin, T. Weidele, H. Gattermann, A. Schattauer, P. Weiland, Anlagentechnik zur Biogasbereitstellung, Fachagentur für Nachwachsende Rohstoffe, Handreichung Biogasgewinnung und –nutzung, 3rd edition, Gülzow/Germany; 2006, 36−85.
Đulbić M., Biogas - dobijanje, korišćenje i gradnja uređaja [Biogas – production, use and devices design], Tehnička knjiga, Beograd 1986, 45−50.
M. Effenberger, F. Kaiser, R.Kissel, A. Gronauer, So klappt’s auch mit der Biologie, Biogas Journal, Vol. 4 (2007) 16−17.
V. Mićić, Z. Petrović, P. Dugić, Biomasa i biogas kao alternativno gorivo [Biomass and biogas as alternative fuel], Faculty of Technology of Istocno Sarajevo University, 2015, 91−104.
M. Oslaj, B.Mursec, Biogas production from maize hybrids, Biomass and Bioenergy, Vol. 34 (2010) 1538−1545.
O. Jönsson, M. Persson, Biogas as transportation fuel, FVS Fachtagung 2003, 8−11.
M. Persson, Biogas a sustainable fuel for the transport sector, Biomass and Bioenergy, Vol. 4 (2006) 34−36.
J. Gorman, Hydrogen the next genera-tion, Sci News, Vol. 162 (2002) 235−236.
C. C. Elam, C. E. Gregoire, G. Sandrock, A. Luzzi, P. Lindblad, E. F Hagen, Realizing the hydrogen future: the International Energy Agency’s efforts to advance hydrogen energy technologies, Int. J. Hydrogen Energy, Vol. 28 (2003) 601−607.
S. M. Kotay, D. Das, Biohydrogen as a renewable energy resource, Prospects and potentials, Int. J. Hydrogen Energy, Vol. 33 (2008) 258−263.
J. Benemann, Hydrogen biotechnology, progress and prospects, Nat Biotechnol, Vol. 14 (1996) 1101−1103.
P. C. Hallenbeck, J. R. Benemann, Biological hydrogen production, fundamentals and limiting processes, Int. J. Hydrogen Energy, Vol. 27 (2002) 1185−1193.
D. Das, T. N Veziroglu, Hydrogen production by biological processes a survey of literature, Int. J. Hydrogen Energy, Vol. 26 (2001) 13−28.
A. Demirbas, Progress and recent trends in biofuels, Prog Energy Combustion Science, Vol. 33 (2007) 1−18.