Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge
Four parameters affecting hydrothermal pretreatment (HTP) of municipal sludge prior to anaerobic digestion and fermentation were investigated. Partial factorial design including several key HTP parameters at two distinct levels, including temperature (170 and 190 °C), retention time (RT) (10 and 30...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Fermentation |
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| Online Access: | https://www.mdpi.com/2311-5637/9/6/508 |
| _version_ | 1827737455648833536 |
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| author | Farokh Laqa Kakar Hussain Aqeel Steven N. Liss Elsayed Elbeshbishy |
| author_facet | Farokh Laqa Kakar Hussain Aqeel Steven N. Liss Elsayed Elbeshbishy |
| author_sort | Farokh Laqa Kakar |
| collection | DOAJ |
| description | Four parameters affecting hydrothermal pretreatment (HTP) of municipal sludge prior to anaerobic digestion and fermentation were investigated. Partial factorial design including several key HTP parameters at two distinct levels, including temperature (170 and 190 °C), retention time (RT) (10 and 30 min), pH (4 and 10), and solid content (SC) (4% and 16%), were studied. Further, the impact of HTP parameters on mesophilic and thermophilic fermentation was explored and compared. Results revealed a significant effect of all HTP parameters on COD solubilization, VFA, and methane yield. There were correlations between HTP parameters and process responses such as VFA yield and methane yield. HTP was found to increase COD solubilization and VFA production between 15 and 20% during thermophilic fermentation in relation to mesophilic treatment. All parameters, including SC, temperature, pH, and RT, were important contributing factors affecting methane production during anaerobic digestion. The highest methane production yield of 269 mL CH<sub>4</sub>/g TCOD added was observed at the highest SC (16%) and pH (10) and at the lower temperature (170 °C) and RT (10). HTP is expected to be combined with other intensification routes to treat waste with high solid contents improving the fermentation and anaerobic digestion processes. |
| first_indexed | 2024-03-11T02:30:18Z |
| format | Article |
| id | doaj.art-f6f06cf5e91249a2855a541c1c9111df |
| institution | Directory Open Access Journal |
| issn | 2311-5637 |
| language | English |
| last_indexed | 2024-03-11T02:30:18Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fermentation |
| spelling | doaj.art-f6f06cf5e91249a2855a541c1c9111df2023-11-18T10:20:43ZengMDPI AGFermentation2311-56372023-05-019650810.3390/fermentation9060508Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal SludgeFarokh Laqa Kakar0Hussain Aqeel1Steven N. Liss2Elsayed Elbeshbishy3Brown and Caldwell, Vancouver, BC V5H 4M2, CanadaDepartment of Chemistry and Biology, Faculty of Science, Toronto Metropolitan University, Toronto, ON M5B 2K3, CanadaDepartment of Chemistry and Biology, Faculty of Science, Toronto Metropolitan University, Toronto, ON M5B 2K3, CanadaDepartment of Civil Engineering, Faculty of Engineering, Architecture, and Science, Ryerson University, Toronto, ON M5B 2K3, CanadaFour parameters affecting hydrothermal pretreatment (HTP) of municipal sludge prior to anaerobic digestion and fermentation were investigated. Partial factorial design including several key HTP parameters at two distinct levels, including temperature (170 and 190 °C), retention time (RT) (10 and 30 min), pH (4 and 10), and solid content (SC) (4% and 16%), were studied. Further, the impact of HTP parameters on mesophilic and thermophilic fermentation was explored and compared. Results revealed a significant effect of all HTP parameters on COD solubilization, VFA, and methane yield. There were correlations between HTP parameters and process responses such as VFA yield and methane yield. HTP was found to increase COD solubilization and VFA production between 15 and 20% during thermophilic fermentation in relation to mesophilic treatment. All parameters, including SC, temperature, pH, and RT, were important contributing factors affecting methane production during anaerobic digestion. The highest methane production yield of 269 mL CH<sub>4</sub>/g TCOD added was observed at the highest SC (16%) and pH (10) and at the lower temperature (170 °C) and RT (10). HTP is expected to be combined with other intensification routes to treat waste with high solid contents improving the fermentation and anaerobic digestion processes.https://www.mdpi.com/2311-5637/9/6/508anaerobic digestionfermentationhydrothermal pretreatmentpHsolid contenttemperature |
| spellingShingle | Farokh Laqa Kakar Hussain Aqeel Steven N. Liss Elsayed Elbeshbishy Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge Fermentation anaerobic digestion fermentation hydrothermal pretreatment pH solid content temperature |
| title | Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge |
| title_full | Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge |
| title_fullStr | Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge |
| title_full_unstemmed | Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge |
| title_short | Impact of Hydrothermal Pretreatment Parameters on Mesophilic and Thermophilic Fermentation and Anaerobic Digestion of Municipal Sludge |
| title_sort | impact of hydrothermal pretreatment parameters on mesophilic and thermophilic fermentation and anaerobic digestion of municipal sludge |
| topic | anaerobic digestion fermentation hydrothermal pretreatment pH solid content temperature |
| url | https://www.mdpi.com/2311-5637/9/6/508 |
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