Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization
As the global population continues to grow, the demand for resources in agriculture, energy, and industry is also increasing, along with higher waste production. This study explored the potential of using spent coffee grounds (SCG) from local coffee shops in Chiang Mai, Thailand, for co-pyrolysis wi...
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Elsevier
2025-06-01
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| Series: | Energy Nexus |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772427125000956 |
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| author | Nuapon Duongbia Wassana Kamopas Khomsan Ruangrit Thoranis Deethayat Attakorn Asanakham Tanongkiat Kiatsiriroat |
| author_facet | Nuapon Duongbia Wassana Kamopas Khomsan Ruangrit Thoranis Deethayat Attakorn Asanakham Tanongkiat Kiatsiriroat |
| author_sort | Nuapon Duongbia |
| collection | DOAJ |
| description | As the global population continues to grow, the demand for resources in agriculture, energy, and industry is also increasing, along with higher waste production. This study explored the potential of using spent coffee grounds (SCG) from local coffee shops in Chiang Mai, Thailand, for co-pyrolysis with either Leptolyngbya sp. KC 45 (LT) or its residue (LTR)—materials containing valuable antioxidants and pigments used in food, cosmetics, and medicine. The study investigates the chemical properties, quality characteristic, and morphology of the biochar. Various co-pyrolysis ratios of SCG to either LT or LTR (1:0, 2:1, 1:1, 1:2, 0:1) were tested, with 50 g of the mixture pyrolyzed at 500 °C in a fixed-bed reactor, using a heating rate of 5–10 °C/min, nitrogen flow of 100 ml/min, and a 1-hour holding time. Results showed that higher LT or LTR proportions increased biochar yield. Pure SCG biochar had a high heating value of 33.61 MJ/kg, confirming its fuel quality. Co-pyrolyzed biochars exhibited mesoporous structures and improved properties such as pH (6.2–6.5), electrical conductivity (1.01–1.45 dS/m), and C/N ratio (14.53–22.64), indicating their potential as soil amendments. This research contributes to reducing environmental waste by adding value to waste materials. |
| format | Article |
| id | doaj-art-66c76ff926064f12b2d74eecad8a1114 |
| institution | OA Journals |
| issn | 2772-4271 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Nexus |
| spelling | doaj-art-66c76ff926064f12b2d74eecad8a11142025-08-20T02:07:13ZengElsevierEnergy Nexus2772-42712025-06-011810045410.1016/j.nexus.2025.100454Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilizationNuapon Duongbia0Wassana Kamopas1Khomsan Ruangrit2Thoranis Deethayat3Attakorn Asanakham4Tanongkiat Kiatsiriroat5Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand; Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, ThailandMultidisciplinary Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand; Corresponding author.Multidisciplinary Research Institute, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, ThailandAs the global population continues to grow, the demand for resources in agriculture, energy, and industry is also increasing, along with higher waste production. This study explored the potential of using spent coffee grounds (SCG) from local coffee shops in Chiang Mai, Thailand, for co-pyrolysis with either Leptolyngbya sp. KC 45 (LT) or its residue (LTR)—materials containing valuable antioxidants and pigments used in food, cosmetics, and medicine. The study investigates the chemical properties, quality characteristic, and morphology of the biochar. Various co-pyrolysis ratios of SCG to either LT or LTR (1:0, 2:1, 1:1, 1:2, 0:1) were tested, with 50 g of the mixture pyrolyzed at 500 °C in a fixed-bed reactor, using a heating rate of 5–10 °C/min, nitrogen flow of 100 ml/min, and a 1-hour holding time. Results showed that higher LT or LTR proportions increased biochar yield. Pure SCG biochar had a high heating value of 33.61 MJ/kg, confirming its fuel quality. Co-pyrolyzed biochars exhibited mesoporous structures and improved properties such as pH (6.2–6.5), electrical conductivity (1.01–1.45 dS/m), and C/N ratio (14.53–22.64), indicating their potential as soil amendments. This research contributes to reducing environmental waste by adding value to waste materials.http://www.sciencedirect.com/science/article/pii/S2772427125000956BiocharSpent coffee groundLeptolyngbya sp. KC 45CyanobacteriaCo-pyrolysisSoil amendment |
| spellingShingle | Nuapon Duongbia Wassana Kamopas Khomsan Ruangrit Thoranis Deethayat Attakorn Asanakham Tanongkiat Kiatsiriroat Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization Energy Nexus Biochar Spent coffee ground Leptolyngbya sp. KC 45 Cyanobacteria Co-pyrolysis Soil amendment |
| title | Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization |
| title_full | Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization |
| title_fullStr | Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization |
| title_full_unstemmed | Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization |
| title_short | Biochar from co-pyrolysis of spent coffee ground with Leptolyngbya sp. KC 45 biomass and residue for energy and agricultural utilization |
| title_sort | biochar from co pyrolysis of spent coffee ground with leptolyngbya sp kc 45 biomass and residue for energy and agricultural utilization |
| topic | Biochar Spent coffee ground Leptolyngbya sp. KC 45 Cyanobacteria Co-pyrolysis Soil amendment |
| url | http://www.sciencedirect.com/science/article/pii/S2772427125000956 |
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