Abstract
Impact of second-generation ethanol (2G) use in transportation sector mainly depends upon energy efficiency of entire production process. The objective of present study was to determine energy efficiency of a potential lignocellulosic feedstock; wheat straw and its conversion into cellulosic ethanol in Indian scenario. Energy efficiency was determined by calculating Net energy ratio (NER), i.e. ratio of output energy obtained by ethanol and input energy used in ethanol production. Energy consumption and generation at each step is calculated briefly (11,837.35 MJ/ha during Indian dwarf irrigated variety of wheat crop production and 7.1148 MJ/kg straw during ethanol production stage). Total energy consumption is calculated as 8.2988 MJ/kg straw whereas energy generation from ethanol is 15.082 MJ/kg straw; resulting into NER > 1. Major portion of agricultural energy input is contributed by diesel and fertilisers whereas refining process of wheat straw feedstock to ethanol and by-products require mainly in the form of steam and electricity. On an average, 1671.8 kg water free ethanol, 930 kg lignin rich biomass (for combustion), and 561 kg C5-molasses (for fodder) per hectare are produced. Findings of this study, net energy ratio (1.81) and figure of merit (14.8028 MJ/nil kg carbon) proves wheat straw as highest energy efficient lignocellulosic feedstock for the country.
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References
(2016a) India’s energy market in 2015. BP Statistical Review 2016. https://www.bp.com/content/dam/bp/pdf/energy-economics/statistical-review-2016/bp-statistical-review-of-world-energy-2016-full-report.pdf. Accessed 27 Dec 2017
(2016b) World Energy Consumption by Country 2016. http://www.usdebtclock.org/. Accessed 17 June 2017
(2016c) India gets its first 2G ethanol plant in Uttarakhand. The Economic Times—Agriculture. http://economictimes.indiatimes.com/news/economy/agriculture/india-gets-its-first-2g-ethanol-plant-in-uttarakhand/articleshow/51948347.cms. Accessed 28 Dec 2017
(2015a) BP Statistical Review of world energy June 2015. https://www.bp.com/content/dam/bp/pdf/energy-economics/statistical-review-2015/bp-statistical-review-of-world-energy-2015-full-report.pdf. Accessed 28 Dec 2017
(2015b) Growth of Electricity Sector in India From 1947 to 2015. Central Electricity Authority, Ministry of Power, Government of India. http://www.cea.nic.in/reports/others/planning/pdm/growth_2015.pdf. Accessed 28 Dec 2017
(2015c) Energy statistics. Central statistics office, Ministry of statistics and programme implementation, Government of India, New Delhi. http://www.mospi.nic.in/sites/default/files/publication_reports/Energy_Statistics_2015r.pdf.pdf. Accessed 9 July 2017
(2015d) Cellulosic ethanol emerging oppurtunities in India. Novozymes http://2015.re-invest.in/presentations/03_New_Emerging_Technologies/Melssen.pdf. Accessed 28 Dec 2017
(2015e) Annual Report. Department of Agriculture, Cooperation & Farmer’s Welfare, GOI. http://www.agricoop.nic.in/sites/default/files/Final%20Annual%20Report%20English.pdf. Accessed 28 Dec 2017
(2015f) Wheat. Farmers Portal, Department of Agriculture & Cooperation and Farmers Welfare, Ministry of Agriculture and Farmers Welfare, Government of India. http://www.farmer.gov.in/#. Accessed 8 June 2017
(2015g) Wheat. IIWBR http://nsdl.niscair.res.in/jspui/bitstream/123456789/502/1/WHEAT%20-%20formatted.pdf. Accessed 28 Dec 2017
(2014) Economic survey 2012-13- Agriculture. National data sharing and Accessibility policy (NDSAP), Ministry of finance, Department of economic affairs, Government of India. https://data.gov.in/catalog/index-numbers-agricultural-production. Accessed 10 June 2017
(2013) Policy for Management and Utilization of Paddy Straw in Punjab 2013 http://pscst.gov.in/files/Draft%20Policy%20for%20Management%20&%20Utilization%20of%20Paddy%20Straw.pdf. Accessed 28 Dec 2017
Aniti L (2015). India aims to reduce high electricity transmission and distribution system losses. Today in energy, eia, U.S. Energy Information administration https://www.eia.gov/todayinenergy/detail.php?id=23452. Accessed 12 Dec 2017
Baeyens J, Kang Q, Appels L, Dewil R, Lv Y, Tan T (2015) Challenges and opportunities in improving the production of bio-ethanol. Prog Energy Combust Sci 47:60–88. https://doi.org/10.1016/j.pecs.2014.10.003
Bansal A, Illukpitiya P, Tegegne F, Singh SP (2016) Energy efficiency of ethanol production from cellulosic feedstock. Renew Sustain Energy Rev 58:141–146. https://doi.org/10.1016/j.rser.2015.12.122
Bentsen NS, Felby C, Ipsen KH (2006) Energy balance of 2nd generation bioethanol production in Denmark. Denmark: Dong Energy and Royal Veterinary and Agricultural University. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.464.5701&rep=rep1&type=pdf. Accessed 28 Dec 2017
Bernesson S (2004) Life cycle assessment of rapeseed oil, rape methyl ester and ethanol as fuels—a comparison between large- and small scale production. Dissertation, Swedish University of Agricultural Sciences, Uppsala
Bernesson S, Nilsson D, Hansson PA (2004) A limited LCA comparing large-and small-scale production of rape methyl ester (RME) under Swedish conditions. Biomass Bioenerg 26(6):545–559. https://doi.org/10.1016/j.biombioe.2003.10.003
Bhatnagar GV (2016) High pollution levels from straw burning shows green tribune orders were neglected. The WIRE. http://www.downtoearth.org.in/news/crop-burning-punjab-haryana-s-killer-fields-55960. Accessed 28 Dec 2017
Börjesson P (1996) Energy analysis of biomass production and transportation. Biomass Bioenerg 11(4):305–318. https://doi.org/10.1016/0961-9534(96)00024-4
Chaba AA (2015) Environmentally friendly: when they don’t burn straw in fields. The Indian express http://indianexpress.com/article/india/india-news-india/environmentally-friendly-when-they-dont-burn-straw-in-fields/. Accessed 28 Dec 2017
Chandrakant U (2015) Biofuel potential in India. Reseau Biofuelnet Canada http://www.biofuelnet.ca/2015/04/01/biofuel-potential-india/. Accessed 28 Dec 2017
Dalgaard T, Halberg N and Porter JR (2001) A model for fossil energy use in Danish agriculture used to compare organic and conventional farming. Agric Ecosyst Environ 87 (1): 51–65. http://orgprints.org/15521/1/15521.pdf. Accessed 28 Dec 2017
Dalgaard T, Halberg N, Jørgensen MH (2004) Status for energiinput og–output i økologisk jordbrug samt muligheder for energibesparelser. In: Jørgensen U, Dalgaard T (eds) Energi i økologisk jordbrug–reduktion af fossilt energiforbrug og produktion af vedvarende energi, Forskningscenter for Økologisk Jordbrug, pp 25–45. http://orgprints.org/3043/1/rap_19.pdf. Accessed 28 Dec 2017
Elsam (2005) Essential thinking http://www.elsam.dk/multimedia/essentialthinkingenkeltsider.pdf. Accessed 28 Dec 2017
Emery I, Dunn JB, Han H, Wang M (2014) Biomass storage options influence net energy and emissions of cellulosic ethanol. Bioenerg Res 8(2):590–604. https://doi.org/10.1007/s1215
FAOSTAT (2012) Food and agriculture organization of the United nations, Statistics division http://faostat3.fao.org/wds/rest/exporter/streamexcel. Accessed 12 Aug 2017
Feldvoss C, Kann M, Rosing L, Leth KD, Mundt P, Pedersen H, Skovsby K and Nielsen AM (2002) Oversigt over miljøpåvirkninger fra rundstykker. http://www.lcafood.dk/. Accessed 16 July 2017
Ferrel J (2009) DOE’s bioenergy program. Presented at the role of extension in energy. Farm Foundation, Little Rock, AK. https://www.farmfoundation.org/news/articlefiles/1704-Ferrell.pdf. Accessed 28 Dec 2017
Hill J, Nelson E, Tilman D, Polasky S and Tiffany D (2006) Environmental, economic and energetic costs and benefits of biodiesel and ethanol biofuels. Proc Natl Acad Sci USA. 103 (30): 11206–11210 http://www.pnas.org/con%20tent/103/30/11206.full. Accessed 28 Dec 2017
Kuesters J, Lammel J (1999) Investigations of the energy efficiency of the production of winter wheat and sugar beet in Europe. Eur J Agron 11(1):35–43. https://doi.org/10.1016/S1161-0301(99)00015-5
Kuhad RC, Gupta R, Khasa YP, Singh A (2010) Bioethanol production from Lantana camara (red sage): pretreatment, saccharification and fermentation. Bioresour Technol 101:8348–8354. https://doi.org/10.1016/j.biortech.2010.06.043
Lawther JM, Sun RC, Banks WB (1996) Fractional characterization of alkali-labile lignin and alkali-insoluble lignin from wheat straw. Ind Crops Prod 5:291–300. https://doi.org/10.1016/S0926-6690(96)00028-3
Liu R, Yu H, Huang Y (2005) Structure and morphology of cellulose in wheat straw. Cellulose 12:25–34. https://doi.org/10.1023/B:CELL.0000049346.28276.95
López-Abelairas M, Lu-Chau TA, Lema JM (2013a) Enhanced saccharification of biologically pretreated wheat straw for ethanol production. Appl Biochem Biotechnol 169:1147–1159. https://doi.org/10.1007/s12010-012-0054-5
López-Abelairas M, Lu-Chau TA, Lema JM (2013b) Fermentation of biologically pretreated wheat straw for ethanol production: comparison of fermentative microorganisms and process configurations. Appl Biochem Biotechnol 170:1838–1852. https://doi.org/10.1007/s12010-013-0318-8
McLaughlin SB, Walsh ME (1998) Evaluating environmental consequences of producing herbaceous crops for bioenergy. Biomass Bioenerg 14(4):317–324. https://doi.org/10.1016/S0961-9534(97)10066-6
Minu K, Kurian JK, Kishore VVN (2012) Isolation and purification of lignin and silica from the black liquor generated during the production of bioethanol from rice straw. Biomass Bioenerg 39:210–217. https://doi.org/10.1016/j.biombioe.2012.01.007
Mukerjee P (2016) Crop Burning: Punjab and Haryana’s killer fields. Down to earth. http://www.downtoearth.org.in/news/crop-burning-punjab-haryana-s-killer-fields-55960. Accessed 28 Dec 2017
Ojeda K, Sánchez E, Kafarov V (2011) Sustainable ethanol production from lignocellulosic biomass-application of exergy analysis. Energy 36:2119–2128. https://doi.org/10.1016/j.energy.2010.08.017
Pimental D (2003) Ethanol fuels: energy balance, economics and environmental impacts are negative. Nat Resour Res 12(2):127–134. https://doi.org/10.1023/A:1024214812527
Pimental D, Patzek TW (2005) Ethanol production using corn, switch grass and wood; biodiesel production using soybean and sunflower. Nat Resour Res 14(1):65–76. https://doi.org/10.1007/s11053-005-4679-8
Prakash R, Henham A, Bhat IK (1998) Net energy and gross pollution from bioethanol production in India. Fuel 77(14):1629–1633. https://doi.org/10.1016/S0016-2361(98)00085-4
Refsgaard K, Halberg N, Kristensen ES (1998) Energy utilization in crop and dairy production in organic and conventional livestock production systems. Agric Syst 57(4):599–630. https://doi.org/10.1016/S0308-521X(98)00004-3
Rosenberger A, Kaul HP, Senn T, Aufhammer W (2001) Improving the energy balance of bioethanol production from winter cereals: the effect of crop production intensity. Appl Energy 68(1):51–67. https://doi.org/10.1016/S0306-2619(00)00036-2
Schmer MR, Vogel KP, Mitchell RB and Perrin RK (2008) Net energy of cellulosic ethanol from switchgrass. Proc Natl Acad Sci USA. 105 (2): 464–9. http://www.pnas.org/cgi/content/full/0704767105/DC1
Sheth A (2016) Biomass to bioethanol- second generation technology by praj https://www.aidaindia.org/pdf/2.pdf. Accessed 28 Dec 2017
Singh H, Singh AK, Kushwaha H, Singh A (2007) Energy consumption pattern of wheat production in India. Energy 32(10):1848–1854. https://doi.org/10.1016/j.energy.2007.03.001
Srikanth PA (2016) Farm yard manure. Vanashree http://www.vanashree.in/fym.htm. Accessed 28 Dec 2017
Sun RC, Fang JM, Rowlands P, Bolton J (1998) Physicochemical and thermal characterization of wheat straw hemicelluloses and cellulose. J Agr Food Chem 46:2804–2809. https://doi.org/10.1021/jf971078a
Swanaa J, Yanga Y, Behnamb M, Thompson R (2011) An analysis of net energy production and feedstock availability for biobutanol and bioethanol. Bioresour Technol 102(2):2112–2117. https://doi.org/10.1016/j.biortech.2010.08.051
Velmurugan R, Muthukumar K (2012) Sono-assisted enzymatic saccharification of sugarcane bagasse for bioethanol production. Biochem Eng J 63:1–9. https://doi.org/10.1016/j.bej.2012.01.001
YEP E (2011) India’s widening energy deficit. The wall street journal http://blogs.wsj.com/indiarealtime/2011/03/09/indias-widening-energy-deficit/. Accessed 28 Dec 2017
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The Authors gratefully acknowledge to DBT, India (Grant number: DBT-824-BIO) and MHRD, India for their fund & support provided to conduct this study.
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Mishra, A., Kumar, A. & Ghosh, S. Energy assessment of second generation (2G) ethanol production from wheat straw in Indian scenario. 3 Biotech 8, 142 (2018). https://doi.org/10.1007/s13205-018-1135-0
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DOI: https://doi.org/10.1007/s13205-018-1135-0