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- Title
Performance analysis of operating parameters during mesophilic anaerobic digestion of vinasse using principal component analysis.
- Authors
Elazhar, Maryem; Bouchabchoub, Abdelmajid; Kribii, Abdelaziz Ramadane; Elazhar, Fatima; Elmidaoui, Azzedine; Taky, Mohamed
- Abstract
Principal component analysis (PCA) is the statistical tool used in this paper to investigated the synergistic correlations of systematic parameters and their correlations based on the effects of input parameters such as: chemical oxygen demand (COD), initial pH, volatile fatty acids (VFA), hydraulic retention time (HRT), organic loading rate (OLR) and temperature (T) on the anaerobic digestion (AD) performance of vinasse such as methane yield and removal COD in order to improve their monitoring and control. In addition, the variations of these parameters are followed during more than one year taking into account the OLR and their effect on behavior of methane yield, pH and VFA. The results of the PCA indicate that the percentage of variance is 59.74% and 22.21%, respectively for the axes F1 and F2 and the total information is estimated at a percentage of 81.95%. The correlation circle shows that methane yield is positively correlated with pH and T, and inversely correlated with HRT, while VFA is directly correlated as well as alkalinity. Moreover, PCA reveals that the stabilization of pH in the digester has a positive effect on specific biogas yield and methane content. Thus, results indicate a good performance of the mesophilic AD thanks to the stability of physicochemical parameters with biogas production containing 71% of proper methane. The models developed in this study can provide guidance for future feedstock evaluation and process optimization in AD.
- Subjects
PRINCIPAL components analysis; ANAEROBIC digestion; VINASSE; PERCENTILES; BIOGAS production; CHEMICAL oxygen demand
- Publication
Desalination & Water Treatment, 2022, Vol 257, p103
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2022.28528