LAPSE:2023.24782
Published Article
LAPSE:2023.24782
The Relationship of Moisture and Temperature to the Concentration of O2 and CO2 during Biodrying in Semi-Static Piles
March 28, 2023
Abstract
Biodrying was studied over 46 days in two piles (P1 and P2) composed of orange peel and two structuring materials (mulch: P1; sugarcane bagasse: P2). The oxygen and carbon dioxide levels were recorded at different depths (0.1 to 0.6 m). From the beginning to days 33−35 the drying was carried out by a combination of microbial heat, convection, and solar irradiance; moisture reached 30%, corresponding to a water activity (aw) of 0.88−0.9, which was insufficient to maintain microbial activity. Additionally, the O2 and CO2 levels (21% and 0%, respectively) evidenced the end of the biological phase of the process. After day 35, the drying occurred only by convection and solar irradiance. At the end, moisture reached 14% (P1) and 12% (P2), showing that the turning frequency, as well as the type and proportion of the structuring materials, were adequate and significantly influenced moisture reduction, allowing the aeration necessary for biodrying. At the end, a material with an average calorific value of 15,500 kJ/kg was obtained, comparable to wood and other fuels obtained from orange peel, making the biodrying process a suitable option for the stabilization and energy recovery of agricultural and agro-industrial waste with high moisture content.
Biodrying was studied over 46 days in two piles (P1 and P2) composed of orange peel and two structuring materials (mulch: P1; sugarcane bagasse: P2). The oxygen and carbon dioxide levels were recorded at different depths (0.1 to 0.6 m). From the beginning to days 33−35 the drying was carried out by a combination of microbial heat, convection, and solar irradiance; moisture reached 30%, corresponding to a water activity (aw) of 0.88−0.9, which was insufficient to maintain microbial activity. Additionally, the O2 and CO2 levels (21% and 0%, respectively) evidenced the end of the biological phase of the process. After day 35, the drying occurred only by convection and solar irradiance. At the end, moisture reached 14% (P1) and 12% (P2), showing that the turning frequency, as well as the type and proportion of the structuring materials, were adequate and significantly influenced moisture reduction, allowing the aeration necessary for biodrying. At the end, a material with an average calorific value of 15,500 kJ/kg was obtained, comparable to wood and other fuels obtained from orange peel, making the biodrying process a suitable option for the stabilization and energy recovery of agricultural and agro-industrial waste with high moisture content.
Record ID
Keywords
agricultural waste, biofuel, water activity
Suggested Citation
Contreras-Cisneros RM, Orozco-Álvarez C, Piña-Guzmán AB, Ballesteros-Vásquez LC, Molina-Escobar L, Alcántara-García SS, Robles-Martínez F. The Relationship of Moisture and Temperature to the Concentration of O2 and CO2 during Biodrying in Semi-Static Piles. (2023). LAPSE:2023.24782
Author Affiliations
Contreras-Cisneros RM: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Orozco-Álvarez C: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Piña-Guzmán AB: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Ballesteros-Vásquez LC: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Molina-Escobar L: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Alcántara-García SS: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Robles-Martínez F: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico [ORCID]
Orozco-Álvarez C: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Piña-Guzmán AB: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Ballesteros-Vásquez LC: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Molina-Escobar L: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Alcántara-García SS: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico
Robles-Martínez F: Instituto Politécnico Nacional (IPN), Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Departamento de Bioprocesos, Ciudad de México C.P. 07340, Mexico [ORCID]
Journal Name
Processes
Volume
9
Issue
3
First Page
520
Year
2021
Publication Date
2021-03-13
ISSN
2227-9717
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Original Submission
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PII: pr9030520, Publication Type: Journal Article
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LAPSE:2023.24782
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https://doi.org/10.3390/pr9030520
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Mar 28, 2023
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