The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate
Energy self-sufficiency is a current trend in wastewater treatment plants. This effect can be achieved by increasing the production of electricity from biogas and by reducing energy consumption for technological processes. One idea, in line with the circular economy concept, is the use of waste rich...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/7/1907 |
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| author | Anna Wilinska-Lisowska Monika Ossowska Krzysztof Czerwionka |
| author_facet | Anna Wilinska-Lisowska Monika Ossowska Krzysztof Czerwionka |
| author_sort | Anna Wilinska-Lisowska |
| collection | DOAJ |
| description | Energy self-sufficiency is a current trend in wastewater treatment plants. This effect can be achieved by increasing the production of electricity from biogas and by reducing energy consumption for technological processes. One idea, in line with the circular economy concept, is the use of waste rich in organic matter as co-substrates for the fermentation process. The aim of this study was to determine the effect of waste co-fermentation on biogas production and nitrogen concentration in the reject water. A co-fermentation process with flotate or flotate and vegetables increased biogas production compared to primary sludge by 162 and 180%, respectively. During the tests, there was no inhibition of the fermentation process. Hydrolysis of organic compounds contained in flotate and vegetables resulted in a significant increase in ammonium nitrogen (by 80–100%) and dissolved organic nitrogen concentration (by 170–180%). The biogas and methane production rate as well as the ammonium and total nitrogen release rate were calculated. An energy balance was made, which took into account the variable amount of electric energy production depending on the efficiency of the cogeneration systems and energy consumption for supplying oxygen necessary to remove nitrogen contained in the reject water. A positive energy balance was obtained for all analyses. |
| first_indexed | 2024-03-10T12:46:52Z |
| format | Article |
| id | doaj.art-cb6e9ebbfcda464dbed95e1d09a85187 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:46:52Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-cb6e9ebbfcda464dbed95e1d09a851872023-11-21T13:26:56ZengMDPI AGEnergies1996-10732021-03-01147190710.3390/en14071907The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of DigestateAnna Wilinska-Lisowska0Monika Ossowska1Krzysztof Czerwionka2Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, PolandFaculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, PolandFaculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, PolandEnergy self-sufficiency is a current trend in wastewater treatment plants. This effect can be achieved by increasing the production of electricity from biogas and by reducing energy consumption for technological processes. One idea, in line with the circular economy concept, is the use of waste rich in organic matter as co-substrates for the fermentation process. The aim of this study was to determine the effect of waste co-fermentation on biogas production and nitrogen concentration in the reject water. A co-fermentation process with flotate or flotate and vegetables increased biogas production compared to primary sludge by 162 and 180%, respectively. During the tests, there was no inhibition of the fermentation process. Hydrolysis of organic compounds contained in flotate and vegetables resulted in a significant increase in ammonium nitrogen (by 80–100%) and dissolved organic nitrogen concentration (by 170–180%). The biogas and methane production rate as well as the ammonium and total nitrogen release rate were calculated. An energy balance was made, which took into account the variable amount of electric energy production depending on the efficiency of the cogeneration systems and energy consumption for supplying oxygen necessary to remove nitrogen contained in the reject water. A positive energy balance was obtained for all analyses.https://www.mdpi.com/1996-1073/14/7/1907biogas plantwastewater treatment plantco-fermentationorganic nitrogen fractionationenergy balance |
| spellingShingle | Anna Wilinska-Lisowska Monika Ossowska Krzysztof Czerwionka The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate Energies biogas plant wastewater treatment plant co-fermentation organic nitrogen fractionation energy balance |
| title | The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate |
| title_full | The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate |
| title_fullStr | The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate |
| title_full_unstemmed | The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate |
| title_short | The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate |
| title_sort | influence of co fermentation of agri food waste with primary sludge on biogas production and composition of the liquid fraction of digestate |
| topic | biogas plant wastewater treatment plant co-fermentation organic nitrogen fractionation energy balance |
| url | https://www.mdpi.com/1996-1073/14/7/1907 |
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