Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid
Addition of sulfuric acid (H2SO4) to liquid dairy manure (slurry) reduces methane (CH4), nitrous oxide (N2O), and ammonia (NH3) emissions. There is interest in understanding how gaseous emissions respond to decreasing rates of acidification, to determine economically optimum application rates. Acidi...
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Frontiers Media S.A.
2021-07-01
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| Series: | Frontiers in Sustainable Food Systems |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fsufs.2021.678992/full |
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| author | Vera Sokolov Vera Sokolov Jemaneh Habtewold Andrew VanderZaag Kari Dunfield Edward Gregorich Claudia Wagner-Riddle Jason J. Venkiteswaran Robert Gordon |
| author_facet | Vera Sokolov Vera Sokolov Jemaneh Habtewold Andrew VanderZaag Kari Dunfield Edward Gregorich Claudia Wagner-Riddle Jason J. Venkiteswaran Robert Gordon |
| author_sort | Vera Sokolov |
| collection | DOAJ |
| description | Addition of sulfuric acid (H2SO4) to liquid dairy manure (slurry) reduces methane (CH4), nitrous oxide (N2O), and ammonia (NH3) emissions. There is interest in understanding how gaseous emissions respond to decreasing rates of acidification, to determine economically optimum application rates. Acidification rates were tested ranging from 0 to 2 g sulfuric acid (H2SO4) L−1 slurry in six meso-scale outdoor storage tanks, each filled with 10.6 m3 slurry and stored for 114 d. Results showed that the rate of acidification for maximum inhibition of CH4 and NH3 emissions varied markedly, whereas N2O reductions were modest. Reductions of CH4 increased with acid rate from 0 to 1.2 g L−1, with no additional response beyond >1.2 g L−1. In contrast to CH4, inhibitions of NH3 showed a linear response across all rates, although reductions were ≤ 30%. Thus, higher acidification rates would be required to achieve greater NH3 emission reductions. Our findings indicate that achieving >85% NH3 emissions reductions would require 4 × more acid than achieving >85% CH4 reductions. Decisions on optimum H2SO4 rates will depend on the need to mitigate CH4 emissions (the primary greenhouse gas emitted from stored liquid manure) or reduce NH3 emissions (which is regulated in some regions). These results will help develop guidelines related to the potential costs and benefits of reducing emissions through acidification. |
| first_indexed | 2024-12-14T17:52:58Z |
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| issn | 2571-581X |
| language | English |
| last_indexed | 2024-12-14T17:52:58Z |
| publishDate | 2021-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Sustainable Food Systems |
| spelling | doaj.art-193f5de5fc0644688b1e6e46037235fd2022-12-21T22:52:36ZengFrontiers Media S.A.Frontiers in Sustainable Food Systems2571-581X2021-07-01510.3389/fsufs.2021.678992678992Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric AcidVera Sokolov0Vera Sokolov1Jemaneh Habtewold2Andrew VanderZaag3Kari Dunfield4Edward Gregorich5Claudia Wagner-Riddle6Jason J. Venkiteswaran7Robert Gordon8Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, CanadaAgriculture and Agri-Food Canada, Ottawa, ON, CanadaAgriculture and Agri-Food Canada, Ottawa, ON, CanadaAgriculture and Agri-Food Canada, Ottawa, ON, CanadaSchool of Environmental Science, University of Guelph, Guelph, ON, CanadaAgriculture and Agri-Food Canada, Ottawa, ON, CanadaSchool of Environmental Science, University of Guelph, Guelph, ON, CanadaDepartment of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON, CanadaSchool of the Environment, University of Windsor, Windsor, ON, CanadaAddition of sulfuric acid (H2SO4) to liquid dairy manure (slurry) reduces methane (CH4), nitrous oxide (N2O), and ammonia (NH3) emissions. There is interest in understanding how gaseous emissions respond to decreasing rates of acidification, to determine economically optimum application rates. Acidification rates were tested ranging from 0 to 2 g sulfuric acid (H2SO4) L−1 slurry in six meso-scale outdoor storage tanks, each filled with 10.6 m3 slurry and stored for 114 d. Results showed that the rate of acidification for maximum inhibition of CH4 and NH3 emissions varied markedly, whereas N2O reductions were modest. Reductions of CH4 increased with acid rate from 0 to 1.2 g L−1, with no additional response beyond >1.2 g L−1. In contrast to CH4, inhibitions of NH3 showed a linear response across all rates, although reductions were ≤ 30%. Thus, higher acidification rates would be required to achieve greater NH3 emission reductions. Our findings indicate that achieving >85% NH3 emissions reductions would require 4 × more acid than achieving >85% CH4 reductions. Decisions on optimum H2SO4 rates will depend on the need to mitigate CH4 emissions (the primary greenhouse gas emitted from stored liquid manure) or reduce NH3 emissions (which is regulated in some regions). These results will help develop guidelines related to the potential costs and benefits of reducing emissions through acidification.https://www.frontiersin.org/articles/10.3389/fsufs.2021.678992/fullmanure acidificationmethaneammoniamanure managementgreenhouse gases |
| spellingShingle | Vera Sokolov Vera Sokolov Jemaneh Habtewold Andrew VanderZaag Kari Dunfield Edward Gregorich Claudia Wagner-Riddle Jason J. Venkiteswaran Robert Gordon Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid Frontiers in Sustainable Food Systems manure acidification methane ammonia manure management greenhouse gases |
| title | Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid |
| title_full | Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid |
| title_fullStr | Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid |
| title_full_unstemmed | Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid |
| title_short | Response Curves for Ammonia and Methane Emissions From Stored Liquid Manure Receiving Low Rates of Sulfuric Acid |
| title_sort | response curves for ammonia and methane emissions from stored liquid manure receiving low rates of sulfuric acid |
| topic | manure acidification methane ammonia manure management greenhouse gases |
| url | https://www.frontiersin.org/articles/10.3389/fsufs.2021.678992/full |
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