Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification
The use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination of products. This research aimed to evaluate a mixture of a tomato waste and rice husk as biofilter media to reduce NH<sub>3</sub>, N<sub>2</sub>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/8/1838 |
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| author | José L. S. Pereira Adelaide Perdigão David Fangueiro |
| author_facet | José L. S. Pereira Adelaide Perdigão David Fangueiro |
| author_sort | José L. S. Pereira |
| collection | DOAJ |
| description | The use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination of products. This research aimed to evaluate a mixture of a tomato waste and rice husk as biofilter media to reduce NH<sub>3</sub>, N<sub>2</sub>O, CO<sub>2</sub>, and CH<sub>4</sub> losses from a simple and low-cost solution for slurry hygienization by pH modification. The experiment was made in a system of laboratory scale biofilters connected to jars filled with raw slurry as control and three treatment methods: acidified slurry, alkalinized slurry, and neutralized slurry. The gas concentrations were measured for 35 days, and the composition of slurries and biofilters were determined. The results of this study showed that the mixture of biofiltering media, composed of tomato waste and rice husk, has the potential to retain NH<sub>3</sub> and greenhouse gases (GHG) from a simple and low-cost solution for slurry hygienization by pH modification. Compared to the treatment raw slurry biofilter, the treatment neutralized slurry biofilter, subjected to a combined treatment by alkalinization/neutralization, retained 19% NH<sub>3</sub>, 4% CO<sub>2</sub>, and 83% CH<sub>4</sub> losses and had no impact on N<sub>2</sub>O and global warming potential. Thus, the use of tomato waste biofilter during alkalinization did not increase the loss of NH<sub>3</sub> and reduced GHG compared to raw slurry, avoiding the subsequent neutralization of slurry for environmental reasons, and could be used as an organic fertilizer in horticulture. However, using the combined alkalinization/neutralization treatment will improve the fertilizer value of the slurry by adjusting the pH from 9.5 to 7.5. |
| first_indexed | 2024-03-09T12:02:47Z |
| format | Article |
| id | doaj.art-7cfcda42d9434a9a99dde7c35696184c |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T12:02:47Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-7cfcda42d9434a9a99dde7c35696184c2023-11-30T23:02:13ZengMDPI AGAgronomy2073-43952022-08-01128183810.3390/agronomy12081838Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH ModificationJosé L. S. Pereira0Adelaide Perdigão1David Fangueiro2Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500606 Viseu, PortugalAgrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500606 Viseu, PortugalLEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349017 Lisboa, PortugalThe use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination of products. This research aimed to evaluate a mixture of a tomato waste and rice husk as biofilter media to reduce NH<sub>3</sub>, N<sub>2</sub>O, CO<sub>2</sub>, and CH<sub>4</sub> losses from a simple and low-cost solution for slurry hygienization by pH modification. The experiment was made in a system of laboratory scale biofilters connected to jars filled with raw slurry as control and three treatment methods: acidified slurry, alkalinized slurry, and neutralized slurry. The gas concentrations were measured for 35 days, and the composition of slurries and biofilters were determined. The results of this study showed that the mixture of biofiltering media, composed of tomato waste and rice husk, has the potential to retain NH<sub>3</sub> and greenhouse gases (GHG) from a simple and low-cost solution for slurry hygienization by pH modification. Compared to the treatment raw slurry biofilter, the treatment neutralized slurry biofilter, subjected to a combined treatment by alkalinization/neutralization, retained 19% NH<sub>3</sub>, 4% CO<sub>2</sub>, and 83% CH<sub>4</sub> losses and had no impact on N<sub>2</sub>O and global warming potential. Thus, the use of tomato waste biofilter during alkalinization did not increase the loss of NH<sub>3</sub> and reduced GHG compared to raw slurry, avoiding the subsequent neutralization of slurry for environmental reasons, and could be used as an organic fertilizer in horticulture. However, using the combined alkalinization/neutralization treatment will improve the fertilizer value of the slurry by adjusting the pH from 9.5 to 7.5.https://www.mdpi.com/2073-4395/12/8/1838ammoniabiofilterGHG emissionsmitigation measurepH adjustmenttomato waste |
| spellingShingle | José L. S. Pereira Adelaide Perdigão David Fangueiro Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification Agronomy ammonia biofilter GHG emissions mitigation measure pH adjustment tomato waste |
| title | Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification |
| title_full | Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification |
| title_fullStr | Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification |
| title_full_unstemmed | Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification |
| title_short | Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification |
| title_sort | evaluation of a tomato waste biofilter for the retention of gaseous losses from pig slurry hygienization by ph modification |
| topic | ammonia biofilter GHG emissions mitigation measure pH adjustment tomato waste |
| url | https://www.mdpi.com/2073-4395/12/8/1838 |
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