Feedstock and inoculum characteristics and process parameters as predictors for methane yield in mesophilic solid-state anaerobic digestion
Document title: Feedstock and inoculum characteristics and process parameters as predictors for methane yield in mesophilic solid-state anaerobic digestion
Journal: Anais da Academia Brasileira de Ciencias
Database: PERIÓDICA
System number: 000436270
ISSN: 0001-3765
Authors: 1
1
1
1
Institutions: 1Universidade Federal de Minas Gerais, Escola de Engenharia, Belo Horizonte, Minas Gerais. Brasil
Year:
Volumen: 91
Number: 4
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Aplicado, descriptivo
English abstract In this study, several linear regression models were tested to predict the cumulative 30-day methane yield produced in mesophilic solid-state anaerobic digestion, employing diverse lignocellulosic biomass sources. Data collected from 13 studies were utilized, totalizing 86 experimental points, divided into regression and validation. Models containing higher order terms, the inverse of variables and interactions among all eleven input variables were tested. Simple linear models utilizing a single variable were unable to describe the methane production, giving an R² lower than 0.37. However, combinations of multiple variables and its inverses as only independent variable permitted an increase in simple linear models predictive capacity up to 63% of experimental variability. Higher order models presented an improvement in predictive quality: for a fourth-order multiple linear model, a validation R² of 0.8329 was achieved. In view of the obtained results, the proposed linear regression models consist in an attractive tool to propose experimental routines and to investigate new biomass sources for methane production using solid-state anaerobic digestion, significantly reducing time and cost requirements to experiments’ execution
Disciplines: Química
Keyword: Ingeniería química,
Lignocelulosa,
Digestión anaeróbica,
Biogás,
Metano,
Modelos polinomiales
Keyword: Chemical engineering,
Lignocellulose,
Anaerobic digestion,
Biogas,
Methane,
Polynomial models
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