Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment
Anaerobic digestion (AD) is an energy production process and food waste is a potential feedstock. The main biochemical reactions are Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis. The hydrolysis step acts as the rate-limiting reaction and the pretreatment of the feedstocks can be used t...
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| Format: | Article |
| Language: | English |
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Mahidol University
2022-01-01
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| Series: | Environment and Natural Resources Journal |
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| Online Access: | https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245149/166227 |
| _version_ | 1828833164523470848 |
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| author | T.U. Habarakada Liyanage Sandhya Babel |
| author_facet | T.U. Habarakada Liyanage Sandhya Babel |
| author_sort | T.U. Habarakada Liyanage |
| collection | DOAJ |
| description | Anaerobic digestion (AD) is an energy production process and food waste is a potential feedstock. The main biochemical reactions are Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis. The hydrolysis step acts as the rate-limiting reaction and the pretreatment of the feedstocks can be used to support this step. In this research, thermal pretreatment was used as a potential method for food waste pretreatment. Six different pretreatment conditions were used: two different temperatures (80oC and 100oC) and three different pretreatment times (30, 60, and 90 min). The Bio-Methane Potential (BMP) test was conducted using 120 mL serum bottles for 20 days to determine the most suitable pretreatment conditions. An experiment was also conducted at the selected optimal conditions (80oC for 90 min) using a small-scale bioreactor against the control with a NaHCO3 buffer solution. The highest Soluble Chemical Oxygen Demand (SCOD) was observed at 100oC for 90 min. The optimal pretreatment was selected as 80oC for 90 min, which produced 14.75 mL/g VS of methane while the control produced 8.64 mL/g VS in BMP test. After a few days, the methane production started to slow down due to a decrease in pH. When a buffer was added, a specific methane yield of 120.13 mL/g VS was observed in the small-scale bioreactor. This was an 11.24% increase compared to the buffered control without thermal pretreatment. In conclusion, thermal pretreatment has a potential to enhance the AD but it is economical to use with less biodegradable waste than food waste. |
| first_indexed | 2024-12-12T17:10:44Z |
| format | Article |
| id | doaj.art-9bc81f4c712948cab9d1278d77c14f0f |
| institution | Directory Open Access Journal |
| issn | 1686-5456 2408-2384 |
| language | English |
| last_indexed | 2024-12-12T17:10:44Z |
| publishDate | 2022-01-01 |
| publisher | Mahidol University |
| record_format | Article |
| series | Environment and Natural Resources Journal |
| spelling | doaj.art-9bc81f4c712948cab9d1278d77c14f0f2022-12-22T00:17:52ZengMahidol UniversityEnvironment and Natural Resources Journal1686-54562408-23842022-01-01201101810.32526/ennrj/20/202100063Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal PretreatmentT.U. Habarakada Liyanage0Sandhya Babel1School of Bio-chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, ThailandSchool of Bio-chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, ThailandAnaerobic digestion (AD) is an energy production process and food waste is a potential feedstock. The main biochemical reactions are Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis. The hydrolysis step acts as the rate-limiting reaction and the pretreatment of the feedstocks can be used to support this step. In this research, thermal pretreatment was used as a potential method for food waste pretreatment. Six different pretreatment conditions were used: two different temperatures (80oC and 100oC) and three different pretreatment times (30, 60, and 90 min). The Bio-Methane Potential (BMP) test was conducted using 120 mL serum bottles for 20 days to determine the most suitable pretreatment conditions. An experiment was also conducted at the selected optimal conditions (80oC for 90 min) using a small-scale bioreactor against the control with a NaHCO3 buffer solution. The highest Soluble Chemical Oxygen Demand (SCOD) was observed at 100oC for 90 min. The optimal pretreatment was selected as 80oC for 90 min, which produced 14.75 mL/g VS of methane while the control produced 8.64 mL/g VS in BMP test. After a few days, the methane production started to slow down due to a decrease in pH. When a buffer was added, a specific methane yield of 120.13 mL/g VS was observed in the small-scale bioreactor. This was an 11.24% increase compared to the buffered control without thermal pretreatment. In conclusion, thermal pretreatment has a potential to enhance the AD but it is economical to use with less biodegradable waste than food waste.https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245149/166227food wasteanaerobic digestionbio-methanepretreatmentbufferbioreactor |
| spellingShingle | T.U. Habarakada Liyanage Sandhya Babel Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment Environment and Natural Resources Journal food waste anaerobic digestion bio-methane pretreatment buffer bioreactor |
| title | Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment |
| title_full | Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment |
| title_fullStr | Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment |
| title_full_unstemmed | Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment |
| title_short | Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment |
| title_sort | enhancement of methane production in anaerobic digestion of food waste using thermal pretreatment |
| topic | food waste anaerobic digestion bio-methane pretreatment buffer bioreactor |
| url | https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245149/166227 |
| work_keys_str_mv | AT tuhabarakadaliyanage enhancementofmethaneproductioninanaerobicdigestionoffoodwasteusingthermalpretreatment AT sandhyababel enhancementofmethaneproductioninanaerobicdigestionoffoodwasteusingthermalpretreatment |