Greenhouse gas emissions from digestate in soil
<strong>Purpose</strong> Biogas residues, digestates, contain valuable nutrients and are therefore suitable as agricultural fertilizers. However, the application of fertilizers, including digestates, can enhance greenhouse gas (GHG) emissions. In this study different processes and post-t...
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| Format: | Article |
| Language: | English |
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OICC Press
2020-03-01
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| Series: | International Journal of Recycling of Organic Waste in Agriculture |
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| Online Access: | http://ijrowa.khuisf.ac.ir/article_671207_e9c0be73a452032f9db80af7dd17c32a.pdf |
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| _version_ | 1841564324813864960 |
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| author | Maria Dietrich Monica Fongen Bente Foereid |
| author_facet | Maria Dietrich Monica Fongen Bente Foereid |
| author_sort | Maria Dietrich |
| collection | DOAJ |
| description | <strong>Purpose</strong> Biogas residues, digestates, contain valuable nutrients and are therefore suitable as agricultural fertilizers. However, the application of fertilizers, including digestates, can enhance greenhouse gas (GHG) emissions. In this study different processes and post-treatments of digestates were analyzed with respect to triggered GHG emissions in soil.<br /> <strong>Methods</strong> In an incubation experiment, GHG emissions from two contrasting soils (chernozem and sandy soil) were compared after the application of digestate products sampled from the process chain of a food waste biogas plant: raw substrate, digestate (with and without bentonite addition), digestates after separation of liquid and solid phase and composted solid digestate. In addition, the solid digestate was sampled at another plant.<br /> <strong>Results</strong> The plant, where the solid digestate originated from, and the soil type influenced nitrous oxide (N<sub>2</sub>O) emissions significantly over the 38-day experiment. Composting lowered N<sub>2</sub>O emissions after soil application, whereas bentonite addition did not have a significant effect. High peaks of N<sub>2</sub>O emissions were observed during the first days after application of acidified, liquid fraction of digestate. N<sub>2</sub>O emissions were strongly correlated to initial ammonium (NH<sub>4</sub><sup>+</sup>) content.<br /> <strong>Conclusion</strong> Fertilization with dewatered digestate (both fractions) increased N<sub>2</sub>O emission, especially when applied to soils high in nutrients and organic matter. |
| format | Article |
| id | doaj-art-7374690af46e4ea9811b70cd87354889 |
| institution | Kabale University |
| issn | 2195-3228 2251-7715 |
| language | English |
| publishDate | 2020-03-01 |
| publisher | OICC Press |
| record_format | Article |
| series | International Journal of Recycling of Organic Waste in Agriculture |
| spelling | doaj-art-7374690af46e4ea9811b70cd873548892025-01-02T22:58:58ZengOICC PressInternational Journal of Recycling of Organic Waste in Agriculture2195-32282251-77152020-03-019111910.30486/ijrowa.2020.1885341.1005671207Greenhouse gas emissions from digestate in soilMaria Dietrich0Monica Fongen1Bente Foereid2Norwegian Institute of Bioeconomy Research, NIBIO NO-1431 As, NorwayNorwegian Institute of Bioeconomy Research, NIBIO NO-1431 As, NorwayNorwegian Institute of Bioeconomy Research, NIBIO NO-1431 As, Norway<strong>Purpose</strong> Biogas residues, digestates, contain valuable nutrients and are therefore suitable as agricultural fertilizers. However, the application of fertilizers, including digestates, can enhance greenhouse gas (GHG) emissions. In this study different processes and post-treatments of digestates were analyzed with respect to triggered GHG emissions in soil.<br /> <strong>Methods</strong> In an incubation experiment, GHG emissions from two contrasting soils (chernozem and sandy soil) were compared after the application of digestate products sampled from the process chain of a food waste biogas plant: raw substrate, digestate (with and without bentonite addition), digestates after separation of liquid and solid phase and composted solid digestate. In addition, the solid digestate was sampled at another plant.<br /> <strong>Results</strong> The plant, where the solid digestate originated from, and the soil type influenced nitrous oxide (N<sub>2</sub>O) emissions significantly over the 38-day experiment. Composting lowered N<sub>2</sub>O emissions after soil application, whereas bentonite addition did not have a significant effect. High peaks of N<sub>2</sub>O emissions were observed during the first days after application of acidified, liquid fraction of digestate. N<sub>2</sub>O emissions were strongly correlated to initial ammonium (NH<sub>4</sub><sup>+</sup>) content.<br /> <strong>Conclusion</strong> Fertilization with dewatered digestate (both fractions) increased N<sub>2</sub>O emission, especially when applied to soils high in nutrients and organic matter.http://ijrowa.khuisf.ac.ir/article_671207_e9c0be73a452032f9db80af7dd17c32a.pdfgreenhouse gasnitrous oxidedigestatefood wasteorganic fertilizer |
| spellingShingle | Maria Dietrich Monica Fongen Bente Foereid Greenhouse gas emissions from digestate in soil International Journal of Recycling of Organic Waste in Agriculture greenhouse gas nitrous oxide digestate food waste organic fertilizer |
| title | Greenhouse gas emissions from digestate in soil |
| title_full | Greenhouse gas emissions from digestate in soil |
| title_fullStr | Greenhouse gas emissions from digestate in soil |
| title_full_unstemmed | Greenhouse gas emissions from digestate in soil |
| title_short | Greenhouse gas emissions from digestate in soil |
| title_sort | greenhouse gas emissions from digestate in soil |
| topic | greenhouse gas nitrous oxide digestate food waste organic fertilizer |
| url | http://ijrowa.khuisf.ac.ir/article_671207_e9c0be73a452032f9db80af7dd17c32a.pdf |
| work_keys_str_mv | AT mariadietrich greenhousegasemissionsfromdigestateinsoil AT monicafongen greenhousegasemissionsfromdigestateinsoil AT bentefoereid greenhousegasemissionsfromdigestateinsoil |