Abstract
This study focuses on greenhouse gas (GHG) emission from livestock manure. In addition to the global warming potential of the GHGs (e.g., CH4, N2O, NO, CO2), ammonia (NH3) emissions contribute to global warming when NH3 is converted to nitrous oxide (N2O). Therefore, this chapter addresses in detail the GHG and NH3 emissions from livestock manure and their mitigation strategies. This chapter illustrates several mitigation strategies for reducing emissions from manure management continuum, for example, manure storage abatement techniques, use of additives, manipulation of manure pH, implementation of inhibitors, anaerobic treatment, thermochemical conversion of manure, and implementation mitigation policies (e.g., emission tax, emission cap, livestock extensification). Additionally, several innovative mitigation strategies were discussed, for instance, manure treatment methods to produce value-added products and bioenergy and abate emissions, the biorefinery approach, and life cycle analysis to improve the productivity and use of resources and abate emissions.
Keywords
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Abdelsalam E, Samer M, Abdel-Hadi MA, Hassan HE, Badr Y (2015) Buffalo dung treatment with paunch fluid for producing biogas. Misr J Agric Eng (in Press)
Al-Kanani T, Akochi E, Mackenzie AF, Alli I, Barrington S (1992) Organic and inorganic amendments to reduce ammonia losses from liquid hog manure. J Environ Qual 21:709–715
Audsley E, Wilkinson M (2014) What is the potential for reducing national greenhouse gas emissions from crop and livestock production systems? J Clean Prod (in press). doi:http://dx.doi.org/10.1016/j.jclepro.2014.01.066
Beck J, Burton C (1998) Manure treatment techniques in Europe – result of a EU concerted action. In: Proceedings of the international conference on agricultural engineering, AgEng 98, Oslo, Norway, 24–27 Aug, pp 211–212
Berg W (1999) Technology assessment – livestock management. Anim Res Dev 50:98–109
Berg W (2003) Reducing ammonia emissions by combining covering and acidifying liquid manure. In: Proceedings of the third international conference on air pollution from agricultural operations, Raleigh, NC, USA, 12–15 Oct, pp 174–182
Berg W, Hoernig G (1997) Emission reduction by acidification of slurry – investigations and assessment. In: Voormans JAM, Monteny GJ (eds) Proceedings of the international symposium on ammonia and odour control from animal production facilities, Vinkeloord, The Netherlands, 6–10 Oct, pp 459–466
Berg W, Pazsiczki I (2003) Reducing emissions by combining slurry covering and acidifying. In: Proceedings of the international symposium on gaseous and odour emissions from animal production facilities, Horsens, Denmark, 1–4 June, pp 460–468
Berg W, Samer M (2010) Emissions from manure tanks. Presented at the international DLG exhibition for animal husbandry and management (EuroTier), 16–19 Nov, Hannover, Germany
Berg W, Brunsch R, Pazsiczki I (2006a) Greenhouse gas emissions from covered slurry compared with uncovered during storage. Agric Ecosyst Environ 112(2–3):129–134
Berg W, Türk M, Hellebrand J (2006b) Effects of acidifying liquid cattle manure with nitric or lactic acid on gaseous emissions. Workshop on agricultural air quality – State of the science. Potomac, MD, USA, 5–8 June 2006, pp 492–498
Beukes PC, Gregorini P, Romera AJ, Levy G, Waghorn GC (2010) Improving production efficiency as a strategy to mitigate greenhouse gas emissions on pastoral dairy farms in New Zealand. Agric Ecosyst Environ 136:358–365
Brink C, Kroeze C, Klimont Z (2001) Ammonia abatement and its impact on emissions of nitrous oxide and methane – part 2: application for Europe. Atmos Environ 35(36):6313–6325
Cantrell KB, Ducey T, Ro KS, Hunt PG (2008) Livestock waste-to-bioenergy generation opportunities. Rev Bioresour Technol 99:7941–7953
Capper JL (2012) Is the grass always greener? Comparing the environmental impact of conventional, natural and grass-fed beef production systems. Animals 2:127–143
Carew R (2010) Ammonia emissions from livestock industries in Canada: feasibility of abatement strategies. Environ Pollut 158(8):2618–2626
Chadwick D, Sommer S, Thorman R, Fangueiro D, Cardenas L, Amon B, Misselbrook T (2011) Manure management: implications for greenhouse gas emissions. Anim Feed Sci Technol 166–167:514–531
CIGR (1994) Aerial environment in animal housing: concentrations in and emissions from farm buildings. Working group report series number 94.1: climatization and environmental control in animal housing. International Commission of Agricultural Engineering (CIGR)
Cottle DJ, Nolan JV, Wiedemann SG (2011) Ruminant enteric methane mitigation: a review. Anim Prod Sci 51(6):491–514
Dekker SEM, Aarnink AJA, de Boer IJM, Groot Koerkamp PWG (2011) Emissions of ammonia, nitrous oxide, and methane from aviaries with organic laying hen husbandry. Biosyst Eng 110(2):123–133
ECETOC (1994) Ammonia emissions to in Western Europe. Technical report 62. European Centre for Ecotoxicology and Toxicology of Chemicals, Brussels
EMEP/EEA (2009) EMEP/EEA air pollutant emission inventory guidebook: animal husbandry and manure management. The European Environment Agency (EEA) and the cooperative programme for monitoring and evaluation of the long-range transmission of air pollutants in Europe (EMEP). http://eea.europa.eu/emep-eea-guidebook
European Commission (2003) Integrated Pollution Prevention and Control (IPPC): intensive rearing of poultry and pigs. Reference document on best available techniques for intensive rearing of poultry and pigs
Executive Body for the Convention on Long-Range Transboundary Air Pollution (2007a) Methods and procedures for the technical review of air pollutant emission inventories reported under the convention and its protocols. Economic Commission for Europe, Economic and Social Council, United Nations
Executive Body for the Convention on Long-Range Transboundary Air Pollution (2007b) Guidance document on control techniques for preventing and abating emissions of ammonia. Economic Commission for Europe, Economic and Social Council, United Nations
FAO (2006) Livestock’s role in climate change and air pollution. Available at: ftp://ftp.fao.org/docrep/fao/010/a0701e/A0701E03.pdf. Accessed Dec 2010
Giltrap DL, Singh J, Saggar S, Zaman M (2010) A preliminary study to model the effects of a nitrification inhibitor on nitrous oxide emissions from urine-amended pasture. Agric Ecosyst Environ 136(3–4):310–317
Haeussermann A, Hartung E, Gallmann E, Jungbluth T (2006) Influence of season, ventilation strategy, and slurry removal on methane emissions from pig houses. Agric Ecosyst Environ 112:115–121
Hartung E (1995) Entwicklung einer Messmethode und Grundlagenuntersuchung zur Ammoniakfreisetzung aus Flüssigmist (Development of a measuring method and basic investigation for ammonia release from liquid manure). VDI-MEG Script 275, Dissertation, University of Hohenheim, ISSN-Nr. 0931-6264
Hartung J, Phillips VR (1994) Control of gaseous emissions from livestock buildings and manure stores. J Agric Eng Res 57:173–189
Hendriks JGL, Vrielink MGM (1997) Reducing ammonia emission from pig houses by adding or producing organic acids in pig slurry. In: Voormans JAM, Monteny GJ (eds) Proceedings of the international symposium on ammonia and odour control from animal production facilities, Vinkeloord, The Netherlands, 6–10 Oct, pp 493–501
Husted S, Jensen LS, Jorgensen SS (1991) Reducing ammonia loss from cattle slurry by the use of acidifying additives: the role of the buffer system. J Sci Food Agric 57:335–349
Hutchings NJ, Sommer SG, Andersen JM, Asman WAH (2001) A detailed ammonia emission inventory for Denmark. Atmos Environ 35(11):1959–1968
Hyde BP, Carton OT, O’Toole P, Misselbrook TH (2003) A new inventory of ammonia emissions from Irish agriculture. Atmos Environ 37(1):55–62
IPCC (2006) Intergovernmental panel on climate change, guidelines for national greenhouse gas inventories. Volume 4: agriculture, forestry and other land use. Chapter 10: emissions from livestock and manure management
IPCC (2007a) In: Metz B, Davidson OR, Bosch PR, Dave R, Meyer LA (eds) Climate change 2007: mitigation. Contribution of working group III to the 4th assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK/New York
IPCC (2007b) Climate change 2007: climate Change 2007: the physical science basis, technical summary
IPCC (2007c) Climate change 2007. The physical science basis. Summary for policymakers
Janzen HH, Desjardins RL, Rochette P, Boehm M, Worth D (2008) Better farming, better air. Agriculture and Agri-food Canada, Ottawa
Jensen FH (1974) Geruchsminderung durch Umwälzlüftung (In German, Odor reduction by recirculating ventilation). KTBL-Script 186, The German association for technology and structures in agriculture (KTBL), Darmstadt-Kranichstein, Germany
Kaparaju P, Rintala J (2011) Mitigation of greenhouse gas emissions by adopting anaerobic digestion technology on dairy, sow and pig farms in Finland. Renew Energy 36:31–41
Key N, Tallard G (2012) Mitigating methane emissions from livestock: a global analysis of sectoral policies. Clim Change 112(2):387–414
Kroodsma W, Ogink NWM (1997) Volatile emissions from cow cubicle houses and its reduction by immersion of the slats with acidified slurry. In: Voormans JAM, Monteny GJ (eds) Proceedings of the international symposium on ammonia and odour control from animal production facilities, Vinkeloord, The Netherlands, 6–10 Oct, pp 475–483
Kuczynski T, Blanes-Vidal V, Li BM, Gates RS, Nääs IA, Moura DJ, Berckmans D, Banhazi TM (2011) Impact of global climate change on the health, welfare and productivity of intensively housed livestock. Int J Agric Biol Eng 4(2):1–22
Lay JJ, Li YY, Noike T (1997) Influences of pH and moisture content on the methane production in high-solids sludge digestion. Water Res 31(6):1518–1524
Li H, Xin H, Burns RT (2006) Reduction of ammonia emission from stored poultry manure using additives: zeolite, Al+ clear, Ferix-3, and PLT. ASAE Paper No. 064188, 2006 ASABE Annual International Meeting, Portland, OR, USA
Martinez J, Jolivet J, Guiziou F, Langeoire G (1997) Ammonia emissions from pig slurries: evaluation of acidification and the use of additives in reducing losses. In: Voormans JAM, Monteny GJ (eds) Proceedings of the international symposium on ammonia and odour control from animal production facilities, Vinkeloord, The Netherlands, 6–10 Oct, pp 485–492
Merino P, Ramirez-Fanlo E, Arriaga H, del Hierro O, Artetxe A, Viguria M (2011) Regional inventory of methane and nitrous oxide emission from ruminant livestock in the Basque Country. Anim Feed Sci Technol 166–167:628–640
Monteny G-J, Bannink A, Chadwick D (2006) Greenhouse gas abatement strategies for animal husbandry. Agric Ecosyst Environ 112:163–170
Neufeldt H, Schaefer M (2008) Mitigation strategies for greenhouse gas emissions from agriculture using a regional economic-ecosystem model. Agric Ecosyst Environ 123:305–316
Ngwabie NM, Jeppsson K-H, Nimmermark S, Gustafsson G (2011) Effects of animal and climate parameters on gas emissions from a barn for fattening pigs. Appl Eng Agric 27(6):1027–1037
Novak SM, Fiorelli JL (2010) Greenhouse gases and ammonia emissions from organic mixed crop-dairy systems: a critical review of mitigation options. Agron Sustain Dev 30(2):215–236
Oenema O, Velthof GL (1993) Denitrification in nitric-acid-treated cattle slurry during storage. Neth J Agric Sci 41:63–80
Pain BF, Thompson RB, Rees YJ, Skinner JH (1990) Reducing gaseous losses of nitrogen from cattle slurry applied to grassland by the use of additives. J Sci Food Agric 50:141–153
Pedersen P (2003) Reduction of gaseous emissions from pig houses by adding sulphuric acid to the slurry. In: Proceedings of the international symposium on gaseous and odour emissions from animal production facilities, Horsens, Denmark, 1–4 June, pp 257–263
Petersen SO, Sommer SG (2011) Ammonia and nitrous oxide interactions: roles of manure organic matter management. Anim Feed Sci Technol 166–167:503–513
Petersen SO, Blanchard M, Chadwick D, Del Prado A, Edouard N, Mosquera J, Sommer SG (2013) Manure management for greenhouse gas mitigation. Animal 7(2):266–282
Powell JM, Russelle MP, Martin N (2010) Trends in the dairy industry and their implications for producers and the environment. In: Gerber P, Mooney HA, Kijkman J, Tarawali S, De Haan C (eds) Livestock in a changing landscape. Experiences and regional perspectives, vol 2. Island Press, Washington, DC, Chapter 7
Rahman S, DeSutter T, Zhang Q (2011) Efficacy of a microbial additive in reducing odor, ammonia, and hydrogen sulfide emissions from farrowing-gestation swine operation. Agric Eng Int: CIGR J 13(3):1–9
Reidy B, Rhim B, Menzi H (2008a) A new Swiss inventory of ammonia emissions from agriculture based on a survey on farm and manure management and farm-specific model calculations. Atmos Environ 42:3266–3276
Reidy B, Dammgen U, Dohler H, Eurich-Menden B, van Evert FK, Hutchings NJ, Luesink HH, Menzi H, Misselbrook TH, Monteny G-J, Webb J (2008b) Comparison of models used for national agricultural ammonia emission inventories in Europe: liquid manure systems. Atmos Environ 42:3452–3464
Reidy B, Webb J, Misselbrook TH, Menzi H, Luesink HH, Hutchings NJ, Eurich-Menden B, Dohler H, Dammgen U (2009) Comparison of models used for national agricultural ammonia emission inventories in Europe: litter-based manure systems. Atmos Environ 43:1632–1640
Reinhardt-Hanisch A (2008) Grundlagenuntersuchungen zur Wirkung neuartiger Ureaseinhibitoren in der Nutztierhaltung (Basic research on the effects of novel urease inhibitors in animal housing). Dissertation, University of Hohenheim, Stuttgart, Germany
Samer M (2010) A software program for planning and designing biogas plants. Trans ASABE 53(4):1277–1285
Samer M (2011a) How to construct manure storages and handling systems? IST Trans Biosyst Agric Eng 1(1):1–7
Samer M (2011b) Seasonal variations of gaseous emissions from a naturally ventilated dairy barn. Misr J Agric Eng 28(4):1162–1177
Samer M (2012a) Effect of airflow profile on reducing heat stress, enhancing air distribution and diluting gaseous concentrations in dairy barns. Misr J Agric Eng 29(2):837–856
Samer M (2012b) Biogas plant constructions. In: Kumar S (ed) Biogas. InTech, Rijeka, pp 343–368. doi:10.5772/31887. ISBN 978-953-51-0204-5
Samer M (2013a) Emissions inventory of greenhouse gases and ammonia from livestock housing and manure management. Agric Eng Int: CIGR J 15(3):29–54
Samer M (2013b) Towards the implementation of the Green Building concept in agricultural buildings: a literature review. Agric Eng Int: CIGR J 15(2):25–46
Samer M (2014) Implementation of nanotechnology and laser radiation to prototype a biological-chemical filter for reducing gas, odor and dust emissions from livestock buildings. Session: measurement and mitigation of pollutants from livestock and poultry housing. Proceedings of the 2014 American Society of Agricultural and Biological Engineers (ASABE) Annual International Meeting, a joint conference with the Canadian Society of Bioengineering (CSBE), 13-16.07.2014, Paper No. 141870677, Montreal, Quebec, Canada
Samer M, Abuarab ME (2014) Development of CO2-balance for ventilation rate measurements in naturally cross ventilated dairy barns. Trans ASABE 57(4):1255–1264
Samer M, Grimm H, Hatem M, Doluschitz R, Jungbluth T (2008a) Mathematical modeling and spark mapping for construction of aerobic treatment systems and their manure handling system. Proceedings of international conference on agricultural engineering, Book of Abstracts, p 28, EurAgEng, 23–25 June, Hersonissos, Crete, Greece
Samer M, Grimm H, Hatem M, Doluschitz R, Jungbluth T (2008b) Mathematical modeling and spark mapping of dairy farmstead layout in hot climates. Misr J Agric Eng 25(3):1026–1040
Samer M, Loebsin C, von Bobrutzki K, Fiedler M, Ammon C, Berg W, Sanftleben P, Brunsch R (2011a) A computer program for monitoring and controlling ultrasonic anemometers for aerodynamic measurements in animal buildings. Comput Electron Agric 79(1):1–12
Samer M, Loebsin C, Fiedler M, Ammon C, Berg W, Sanftleben P, Brunsch R (2011b) Heat balance and tracer gas technique for airflow rates measurement and gaseous emissions quantification in naturally ventilated livestock buildings. Energy Build 43(12):3718–3728
Samer M, Ammon C, Loebsin C, Fiedler M, Berg W, Sanftleben P, Brunsch R (2012) Moisture balance and tracer gas technique for ventilation rates measurement and greenhouse gases and ammonia emissions quantification in naturally ventilated buildings. Build Environ 50(4):10–20
Samer M, Mostafa E, Hassan A M (2014a) Slurry treatment with food industry wastes for reducing methane, nitrous oxide and ammonia emissions. Misr J Agric Eng 31(4):1523–1548
Samer M, Müller H-J, Fiedler M, Berg W, Brunsch R (2014b) Measurement of ventilation rate in livestock buildings with radioactive tracer gas technique: theory and methodology. Indoor Built Environ 23(5):692–708
Schader C, Jud K, Meier M, Kuhn T, Oehen B, Gattinger A (2013) Quantification of the effectiveness of GHG mitigation measures in Swiss organic milk production using a life cycle assessment approach. J Clean Prod (in press). doi:http://dx.doi.org/10.1016/j.jclepro.2013.11.077
Schils RLM, Olesen JE, del Prado A, Soussana JF (2007) A review of farm level modelling approaches for mitigating greenhouse gas emissions from ruminant livestock systems. Livest Sci 112:240–251
Schuurkes J, Mosello R (1988) The role of external ammonium inputs in freshwater acidification. Aquat Sci – Res Across Bound 50(1):71–86
Shah SB, Kolar P (2012) Evaluation of additive for reducing gaseous emissions from swine waste. Agric Eng Int: CIGR J 14(2):10–20
Sheehan J, Camobreco V, Duffield J, Graboski M, Shapouri H (1998) Life cycle inventory of biodiesel and petroleum diesel for use in an urban bus. Final Report. National Renewable Energy Laboratory, US Department of Energy
Smith P, Martino D, Cai Z, Gwary D, Janzen H, Kumar P, McCarl B, Ogle S, O’Mara F, Rice C, Scholes B, Sirotenko O (2007) Greenhouse gas mitigation in agriculture. In: Metz B, Davidson OR, Bosch PR, Dave R, Meyer LA (eds) Climate change 2007: mitigation. Contribution of working group III to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK, Chapter 8
Sommer SG, Hutchings NJ (2001) Ammonia emission from field applied manure and its reduction – invited paper. Eur J Agron 15(1):1–15
Sommer SG, Christensen BT, Nielsen NE, Schjorring JK (1993) Ammonia volatilization during storage of cattle and pig slurry – effect of surface cover. J Agric Sci 121:63–71
Sommer SG, Pedersen SO, Sogaard HT (2000) Greenhouse gas emissions from stored livestock slurry. J Environ Qual 29:744–751
Sommer SG, Petersen SO, Møller HB (2004) Algorithms for calculating methane and nitrous oxide emissions from manure management. Nutr Cycl Agroecosyst 69(2):143–154
Sommer SG, Zhang GQ, Bannink A, Chadwick D, Misselbrook T, Harrison R, Hutchings NJ, Menzi H, Monteny GJ, Ni JQ, Oenema O, Webb J (2006) Algorithms determining ammonia emission from buildings housing cattle and pigs and from manure stores. Adv Agron 89:261–335
Sommer SG, Olesen J, Petersen SO, Weisbjerg M, Valli L, Rodhe L, Béline F (2009) Region-specific assessment of greenhouse gas mitigation with different manure management strategies in four agroecological zones. Glob Chang Biol 15(12):2825–2837
SRES (2000) In: Nakicenovic N, Swart R (eds) Special report on emissions scenarios (SRES). World Meteorological Organization, Geneva
Stevens RJ, Laughlin RJ, Frost JP (1989) Effect of acidification with sulphuric acid on the volatilization of ammonia from cow and pig slurries. Camb J Agric Sci 113:389–395
Tomasula PM, Nutter DW (2011) Mitigation of greenhouse gas emissions in the production of fluid milk. Adv Food Nutr Res 62:41–88
VanderZaag AC, Jayasundara S, Wagner-Riddle C (2011) Strategies to mitigate nitrous oxide emissions from land applied manure. Anim Feed Sci Technol 166–167:464–479
Vellinga TV, de Haan MHA, Schils RLM, Evers A, van den Pol–van Dasselaar A (2011) Implementation of GHG mitigation on intensive dairy farms: farmers’ preferences and variation in cost effectiveness. Livest Sci 137:185–195
Vergé XPC, Dyer JA, Worth DE, Smith WN, Desjardins RL, McConkey BG (2012) A greenhouse gas and soil carbon model for estimating the carbon footprint of livestock production in Canada. Animals 2:437–454
Webb J, Menzi H, Pain BF, Misselbrook TH, Dammgen U, Hendriks H, Dohler H (2005) Managing ammonia emissions from livestock production in Europe. Environ Pollut 135(3):399–406
Weiske A, Vabitsch A, Olesen JE, Schelde K, Michel J, Friedrich R, Kaltschmitt M (2006) Mitigation of greenhouse gas emissions in European conventional and organic dairy farming. Agric Ecosyst Environ 112:221–232
Wheeler EF, Topper PA, Brandt RC, Brown NE, Adviento-Borbe A, Thomas RS, Varga GA (2011a) Multiple-chamber instrumentation development for comparing gas fluxes from biological materials. Appl Eng Agric 27(6):1049–1060
Wheeler EF, Adviento-Borbe MAA, Brandt RC, Topper PA, Topper DA, Elliott HA, Graves RE, Hristov AN, Ishler VA, Bruns MAV (2011b) Amendments for mitigation of dairy manure ammonia and greenhouse gas emissions: preliminary screening. Agric Eng Int: CIGR J 13(2):1–14
Wheeler EF, Adviento-Borbe MAA, Brandt RC, Topper PA, Topper DA, Elliott HA, Graves RE, Hristov AN, Ishler VA, Bruns MAV (2011c) Evaluation of odor emissions from amended dairy manure: preliminary screening. Agric Eng Int: CIGR J 13(2):15–29
Williams A (2003) Floating covers to reduce ammonia emissions from slurry. In: Proceedings of the international symposium on gaseous and odour emissions from animal production facilities, Horsens, Denmark, 1–4 June, pp 283–291
Wingsley P (2007) Biochar and bioenergy production for climate change mitigation. N Z Sci Rev 64:6–10
Yu L, Yaoqiu K, Ningsheng H, Wu Z, Xu L (2008) Popularizing household-scale biogas digesters for rural sustainable energy development and greenhouse gas mitigation. Renew Energy 33:2027–2035
Zaks DPM, Winchester N, Kucharik CJ, Barford CC, Paltsev S, Reilly JM (2011) Contribution of anaerobic digesters to emissions mitigation and electricity generation under U.S. climate policy. Environ Sci Technol 45(16):6735–6742
Zervas G, Tsiplakou E (2012) An assessment of GHG emissions from small ruminants in comparison with GHG emissions from large ruminants and monogastric livestock. Atmos Environ 49:13–23
Zhang R, McGarvey JA, Ma Y, Mitloehner FM (2008) Effects of anaerobic digestion and aerobic treatment on the reduction of gaseous emissions from dairy manure storages. Int J Agric Biol Eng 1(2):15–20
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Samer, M. (2015). GHG Emission from Livestock Manure and Its Mitigation Strategies. In: Sejian, V., Gaughan, J., Baumgard, L., Prasad, C. (eds) Climate Change Impact on Livestock: Adaptation and Mitigation. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2265-1_20
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