Optimization of methane production through co-digestion of pig manure with napier grass
Alkali-pretreated Napier grass (NG) was applied as a substrate to increase biogas yields in a mesophilic anaerobic co-digestion system with pig manure (PM). The goal was to identify optimal conditions for maximizing methane yield and improving the efficient use of these materials for sustainable ene...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Cleaner Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666790825000540 |
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| author | Ariya Santaweesuk Apichart Artnaseaw Chatchai Benjapiyaporn |
| author_facet | Ariya Santaweesuk Apichart Artnaseaw Chatchai Benjapiyaporn |
| author_sort | Ariya Santaweesuk |
| collection | DOAJ |
| description | Alkali-pretreated Napier grass (NG) was applied as a substrate to increase biogas yields in a mesophilic anaerobic co-digestion system with pig manure (PM). The goal was to identify optimal conditions for maximizing methane yield and improving the efficient use of these materials for sustainable energy. A laboratory-scale setup was used, applying Box-Behnken design and response surface methodology. Key variables included PM/NG ratio (1:2, 1.25:1, 2:1), organic loading rate (OLR) (0.5, 1, 1.5 g VS/L), and total solids content (TS) (1%, 3%, 5% was evaluated, with cumulative methane yield serving as the response variable. The optimal methane production from co-digesting PM and NG was found under conditions with a PM/NG ratio of 1.18, OLR of 0.62 g VS/L, and TS of 4.8%. Under these conditions, methane yield was predicted to be 331.59 mL/gVS, which closely approximated the experimentally observed value of 324.89 mL/gVS. This correspondence confirmed the validity of the optimization results. The kinetic study showed that the Modified Gompertz model accurately captured methane production dynamics, with a high R2. Additionally, significant quadratic effects for the three parameters and notable linear impacts of OLR and TS on biogas production were observed during the co-digestion process. |
| format | Article |
| id | doaj-art-0aa26dc70f8f4d2385412e95f36b60c3 |
| institution | OA Journals |
| issn | 2666-7908 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Cleaner Engineering and Technology |
| spelling | doaj-art-0aa26dc70f8f4d2385412e95f36b60c32025-08-20T01:52:04ZengElsevierCleaner Engineering and Technology2666-79082025-05-012610093110.1016/j.clet.2025.100931Optimization of methane production through co-digestion of pig manure with napier grassAriya Santaweesuk0Apichart Artnaseaw1Chatchai Benjapiyaporn2Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, ThailandDepartment of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand; Corresponding author.Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, ThailandAlkali-pretreated Napier grass (NG) was applied as a substrate to increase biogas yields in a mesophilic anaerobic co-digestion system with pig manure (PM). The goal was to identify optimal conditions for maximizing methane yield and improving the efficient use of these materials for sustainable energy. A laboratory-scale setup was used, applying Box-Behnken design and response surface methodology. Key variables included PM/NG ratio (1:2, 1.25:1, 2:1), organic loading rate (OLR) (0.5, 1, 1.5 g VS/L), and total solids content (TS) (1%, 3%, 5% was evaluated, with cumulative methane yield serving as the response variable. The optimal methane production from co-digesting PM and NG was found under conditions with a PM/NG ratio of 1.18, OLR of 0.62 g VS/L, and TS of 4.8%. Under these conditions, methane yield was predicted to be 331.59 mL/gVS, which closely approximated the experimentally observed value of 324.89 mL/gVS. This correspondence confirmed the validity of the optimization results. The kinetic study showed that the Modified Gompertz model accurately captured methane production dynamics, with a high R2. Additionally, significant quadratic effects for the three parameters and notable linear impacts of OLR and TS on biogas production were observed during the co-digestion process.http://www.sciencedirect.com/science/article/pii/S2666790825000540Co-digestionBiogas optimizationNapier grassPig manure |
| spellingShingle | Ariya Santaweesuk Apichart Artnaseaw Chatchai Benjapiyaporn Optimization of methane production through co-digestion of pig manure with napier grass Cleaner Engineering and Technology Co-digestion Biogas optimization Napier grass Pig manure |
| title | Optimization of methane production through co-digestion of pig manure with napier grass |
| title_full | Optimization of methane production through co-digestion of pig manure with napier grass |
| title_fullStr | Optimization of methane production through co-digestion of pig manure with napier grass |
| title_full_unstemmed | Optimization of methane production through co-digestion of pig manure with napier grass |
| title_short | Optimization of methane production through co-digestion of pig manure with napier grass |
| title_sort | optimization of methane production through co digestion of pig manure with napier grass |
| topic | Co-digestion Biogas optimization Napier grass Pig manure |
| url | http://www.sciencedirect.com/science/article/pii/S2666790825000540 |
| work_keys_str_mv | AT ariyasantaweesuk optimizationofmethaneproductionthroughcodigestionofpigmanurewithnapiergrass AT apichartartnaseaw optimizationofmethaneproductionthroughcodigestionofpigmanurewithnapiergrass AT chatchaibenjapiyaporn optimizationofmethaneproductionthroughcodigestionofpigmanurewithnapiergrass |