Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation
This study aimed to determine the effect of the low-temperature conditioning of excess dairy sewage sludge using solidified carbon dioxide on the efficiency of methane fermentation. An increase in the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio above 0.3 had no significa...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/1/150 |
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| author | Joanna Kazimierowicz Izabela Bartkowska Maria Walery |
| author_facet | Joanna Kazimierowicz Izabela Bartkowska Maria Walery |
| author_sort | Joanna Kazimierowicz |
| collection | DOAJ |
| description | This study aimed to determine the effect of the low-temperature conditioning of excess dairy sewage sludge using solidified carbon dioxide on the efficiency of methane fermentation. An increase in the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio above 0.3 had no significant effect on chemical oxygen demand concentration in the dissolved phase. The highest chemical oxygen demand values, ranging from 490.6 ± 12.9 to 510.5 ± 28.5 mg·dm<sup>−3</sup>, were determined at solidified carbon dioxide to excess dairy sewage sludge ratio ranging from 0.3 to 0.5. The low-temperature conditioning caused ammonia nitrogen concentration to increase from 155.2 ± 10.2 to 185.9 ± 11.1 mg·dm<sup>−3</sup> and orthophosphates concentration to increase from 198.5 ± 23.1 to 300.6 ± 35.9 mg·dm<sup>−3</sup> in the dissolved phase. The highest unitary amount of biogas, reaching 630.2 ± 45.5 cm<sup>3</sup>·g o.d.m.<sup>−1</sup>, was produced in the variant with the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio of 0.3. Methane content of the biogas produced was at 68.7 ± 1.5%. Increased solidified carbon dioxide dose did not lead to any significant changes in biogas and methane production. The efficiency of biogas production from unconditioned excess dairy sewage sludge was lower by 43.0 ± 3.2%. The analysis demonstrated that the low-temperature conditioning is an energetic viable technology aiding the methane fermentation process. |
| first_indexed | 2024-03-10T13:40:17Z |
| format | Article |
| id | doaj.art-07126f5b325e4763971473b91d88f714 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T13:40:17Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-07126f5b325e4763971473b91d88f7142023-11-21T03:04:25ZengMDPI AGEnergies1996-10732020-12-0114115010.3390/en14010150Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane FermentationJoanna Kazimierowicz0Izabela Bartkowska1Maria Walery2Department of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, PolandDepartment of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, PolandDepartment of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, PolandThis study aimed to determine the effect of the low-temperature conditioning of excess dairy sewage sludge using solidified carbon dioxide on the efficiency of methane fermentation. An increase in the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio above 0.3 had no significant effect on chemical oxygen demand concentration in the dissolved phase. The highest chemical oxygen demand values, ranging from 490.6 ± 12.9 to 510.5 ± 28.5 mg·dm<sup>−3</sup>, were determined at solidified carbon dioxide to excess dairy sewage sludge ratio ranging from 0.3 to 0.5. The low-temperature conditioning caused ammonia nitrogen concentration to increase from 155.2 ± 10.2 to 185.9 ± 11.1 mg·dm<sup>−3</sup> and orthophosphates concentration to increase from 198.5 ± 23.1 to 300.6 ± 35.9 mg·dm<sup>−3</sup> in the dissolved phase. The highest unitary amount of biogas, reaching 630.2 ± 45.5 cm<sup>3</sup>·g o.d.m.<sup>−1</sup>, was produced in the variant with the solidified carbon dioxide to excess dairy sewage sludge volumetric ratio of 0.3. Methane content of the biogas produced was at 68.7 ± 1.5%. Increased solidified carbon dioxide dose did not lead to any significant changes in biogas and methane production. The efficiency of biogas production from unconditioned excess dairy sewage sludge was lower by 43.0 ± 3.2%. The analysis demonstrated that the low-temperature conditioning is an energetic viable technology aiding the methane fermentation process.https://www.mdpi.com/1996-1073/14/1/150excess dairy sewage sludgelow-temperature conditioningsolidified carbon dioxidemethane fermentationbiogasprocess optimization |
| spellingShingle | Joanna Kazimierowicz Izabela Bartkowska Maria Walery Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation Energies excess dairy sewage sludge low-temperature conditioning solidified carbon dioxide methane fermentation biogas process optimization |
| title | Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation |
| title_full | Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation |
| title_fullStr | Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation |
| title_full_unstemmed | Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation |
| title_short | Effect of Low-Temperature Conditioning of Excess Dairy Sewage Sludge with the Use of Solidified Carbon Dioxide on the Efficiency of Methane Fermentation |
| title_sort | effect of low temperature conditioning of excess dairy sewage sludge with the use of solidified carbon dioxide on the efficiency of methane fermentation |
| topic | excess dairy sewage sludge low-temperature conditioning solidified carbon dioxide methane fermentation biogas process optimization |
| url | https://www.mdpi.com/1996-1073/14/1/150 |
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