An overview of process monitoring for anaerobic digestion. (July 2021)

• Record Type: Journal Article
• Authors: Cruz, Ianny A.; Andrade, Larissa R.S.; Bharagava, Ram N.; Nadda, Ashok K.; Bilal, Muhammad; Figueiredo, Renan T.; Ferreira, Luiz F.R.
• Is Part Of: Biosystems engineering. Volume 207(2021)
• Page Start: 106
• Page End: 119
• Publication Date: 2021-07
• Subjects: Biogas production -- Anaerobic digestion -- Early-warning indicators -- Monitoring techniques -- Real-time monitoring; Bioengineering -- Periodicals; Agricultural engineering -- Periodicals; Biological systems -- Periodicals; Génie rural -- Périodiques; Systèmes biologiques -- Périodiques; 631
• DOI: 10.1016/j.biosystemseng.2021.04.008
• Languages: English
• ISSNs: 1537-5110

Abstract

Abstract : Anaerobic digestion (AD) is a traditional process that not only manages different sources of organic waste but also generates renewable energy (biomethane) at the same time. However, AD relies on the cooperation of certain microbial communities and is, therefore, vulnerable to process disturbances that may affect biogas production and methane yield. In this context, process monitoring has been receiving attention as a strategy for achieving a stable process and ensuring a high yield of biogas. This review was undertaken to address the recent progress related to contemporary techniques deployed for real-time monitoring of the AD process at different scales. It also points out the necessity of choosing appropriate early-warning indicators and proper monitoring biosystems to achieve accurate information on the bioprocess. Nonetheless, the implementation of online monitoring techniques has been restricted due to its high-cost, which limits its industrial application. On this premise of rigid cost control, further studies are required to make AD real-time monitoring more technically and economically sustainable. Graphical abstract: Image 1 Highlights: AD instability is a crucial operational challenge for biogas production. Process monitoring can provide stable and efficient biogas production. Recent and effective AD monitoring methods are reviewed. In-line monitoring techniques are the best for detecting AD parameters. High costs are still restricting the broad usage of online monitoring methods.