Vol. 23, No. 3 (2024), Bio24313 https://doi.org/10.24275/rmiq/Bio24313

Evaluation of the reaction capacity of early warning indicators to failures in biogas production systems

 

Authors

P.M. Alvarado-Reyna, A. Albalate-Ramírez, E.E. García-Balandrán, C. Escamilla-Alvarado, U. Galván-Arzola, L.R. Miramontes-Martínez, P. Rivas-García

Abstract

To avoid inhibition in biogas full-scale production processes, continuous monitoring along with control and instrumentation techniques is needed. A crucial part of the monitoring system is the use of early warning indicators, which facilitate the timely identification of suboptimal performance within the digester and allow the application of corrective measures in an acceptable time frame. This work evaluated the ability of early warning indicators to react to a failure in a biogas production process after an alteration in the substrate composition. The results show that the most used indicators in the literature failed to react satisfactorily to the scheduled failure. Statistical analysis was used to develop an indicator based on the relationship between biogas productivity and volatile fatty acid concentration, which exhibited adequate precision at the programmed failure. This research contributes to the biogas production processes by offering in-depth analysis data and by enhancing our understanding of the methods required for effective monitoring and control.

Keywords

alkalinity, anaerobic digestion, monitoring and control, methane, stability, inhibition.

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