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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Autores principales:	T.U. Habarakada Liyanage, Sandhya Babel
Formato:	article
Lenguaje:	EN
Publicado:	Mahidol University 2021
Materias:	food waste anaerobic digestion bio-methane pretreatment buffer bioreactor Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/9bc81f4c712948cab9d1278d77c14f0f
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spelling	oai:doaj.org-article:9bc81f4c712948cab9d1278d77c14f0f2021-12-03T08:54:11ZEnhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment10.32526/ennrj/20/2021000631686-54562408-2384https://doaj.org/article/9bc81f4c712948cab9d1278d77c14f0f2021-11-01T00:00:00Zhttps://ph02.tci-thaijo.org/index.php/ennrj/article/view/245149/166227https://doaj.org/toc/1686-5456https://doaj.org/toc/2408-2384Anaerobic 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.T.U. Habarakada LiyanageSandhya BabelMahidol Universityarticlefood wasteanaerobic digestionbio-methanepretreatmentbufferbioreactorEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENEnvironment and Natural Resources Journal, Vol 20, Iss 1, Pp 10-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	food waste anaerobic digestion bio-methane pretreatment buffer bioreactor Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	food waste anaerobic digestion bio-methane pretreatment buffer bioreactor Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 T.U. Habarakada Liyanage Sandhya Babel Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment
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.
format	article
author	T.U. Habarakada Liyanage Sandhya Babel
author_facet	T.U. Habarakada Liyanage Sandhya Babel
author_sort	T.U. Habarakada Liyanage
title	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_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_sort	enhancement of methane production in anaerobic digestion of food waste using thermal pretreatment
publisher	Mahidol University
publishDate	2021
url	https://doaj.org/article/9bc81f4c712948cab9d1278d77c14f0f
work_keys_str_mv	AT tuhabarakadaliyanage enhancementofmethaneproductioninanaerobicdigestionoffoodwasteusingthermalpretreatment AT sandhyababel enhancementofmethaneproductioninanaerobicdigestionoffoodwasteusingthermalpretreatment
_version_	1718373406774132736

Enhancement of Methane Production in Anaerobic Digestion of Food Waste using Thermal Pretreatment

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