TY - JOUR
T1 - Pyrolysis of post-methanated distillery effluent (PMDE) solid waste
T2 - Thermogravimetric degradation, kinetic and thermodynamic study with a circular bioeconomy approach
AU - Naveen, C.
AU - Ghodke, Praveen Kumar
AU - Sharma, Amit Kumar
AU - Chen, Wei Hsin
N1 - Funding Information:
The authors acknowledge the financial support of the National Science and Technology, Taiwan, ROC, under contracts MOST 109-2221-E-006-040-MY3, MOST 110-3116-F-006-003-, and MOST 110-2622-E-006-001-CC1 for this research. This research is also partly supported by Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU), Taiwan. The authors are also thankful for UPES Dehradun and NIT calicut, India for their continuous support during this research project.
Funding Information:
The authors acknowledge the financial support of the National Science and Technology, Taiwan, ROC , under contracts MOST 109-2221-E-006-040-MY3 , MOST 110-3116-F-006-003- , and MOST 110-2622-E-006-001-CC1 for this research. This research is also partly supported by Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU), Taiwan . The authors are also thankful for UPES Dehradun and NIT calicut, India for their continuous support during this research project.
Publisher Copyright:
© 2023 The Author(s)
PY - 2023/8
Y1 - 2023/8
N2 - Post-methanated distillery effluent (PMDE) is a harmful dark brown to black color distillery effluent and is often released in open pond systems after anaerobic digestion by molasses-based distilleries. Due to the high standards imposed by Environmental Protection Acts, various methods of treating effluent were explored. However, pyrolysis showed excellent potential to treat it and recover energy. Hence, the present study explores the viability of producing energy from PMDE solid waste through pyrolysis. The reaction was performed at 900 °C with 20 °C min −1 heating rate in a fixed bed reactor, resulting in 36.12 wt% condensable volatiles, 22.6 wt% non-condensable gases, and 41.28 wt% solid biochar. The gas chromatographic (GC) analysis of the non-condensable gas revealed the presence of CO (17.83 vol%), H2 (8.10 vol%), and CH4 (4.30 vol%) in significant amounts, and C2H4, C2H6, C3H8, and C4H10 in minor quantities. Biochar obtained from the process has a microscopic surface area of 62.13 m2 g−1. A kinetic and thermodynamic study was performed using isoconversional methods to understand the reaction mechanism. Kinetic analysis showed the activation energy of PMDE solid waste pyrolysis to vary from 120 kJ mol −1 to 180 kJ mol −1 as conversion increases, and thermodynamic parameters (ΔH, ΔS, and ΔG) show the explanation for variation in activation energy. Additionally, the bio-circular economic approach of PMDE solid waste was presented.
AB - Post-methanated distillery effluent (PMDE) is a harmful dark brown to black color distillery effluent and is often released in open pond systems after anaerobic digestion by molasses-based distilleries. Due to the high standards imposed by Environmental Protection Acts, various methods of treating effluent were explored. However, pyrolysis showed excellent potential to treat it and recover energy. Hence, the present study explores the viability of producing energy from PMDE solid waste through pyrolysis. The reaction was performed at 900 °C with 20 °C min −1 heating rate in a fixed bed reactor, resulting in 36.12 wt% condensable volatiles, 22.6 wt% non-condensable gases, and 41.28 wt% solid biochar. The gas chromatographic (GC) analysis of the non-condensable gas revealed the presence of CO (17.83 vol%), H2 (8.10 vol%), and CH4 (4.30 vol%) in significant amounts, and C2H4, C2H6, C3H8, and C4H10 in minor quantities. Biochar obtained from the process has a microscopic surface area of 62.13 m2 g−1. A kinetic and thermodynamic study was performed using isoconversional methods to understand the reaction mechanism. Kinetic analysis showed the activation energy of PMDE solid waste pyrolysis to vary from 120 kJ mol −1 to 180 kJ mol −1 as conversion increases, and thermodynamic parameters (ΔH, ΔS, and ΔG) show the explanation for variation in activation energy. Additionally, the bio-circular economic approach of PMDE solid waste was presented.
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U2 - 10.1016/j.eti.2023.103202
DO - 10.1016/j.eti.2023.103202
M3 - Article
AN - SCOPUS:85159549794
SN - 2352-1864
VL - 31
JO - Environmental Technology and Innovation
JF - Environmental Technology and Innovation
M1 - 103202
ER -
