Anaerobic digestion: A review on process monitoring. (April 2019)

• Record Type: Journal Article
• Authors: Wu, Di; Li, Lei; Zhao, Xiaofei; Peng, Yun; Yang, Pingjin; Peng, Xuya
• Is Part Of: Renewable & sustainable energy reviews. Volume 103(2019)
• Page Start: 1
• Page End: 12
• Publication Date: 2019-04
• Subjects: AcoD Anaerobic co-digestion -- AD Anaerobic digestion -- AEM Anion exchange membrane -- BA Bicarbonate alkalinity -- BMP Biochemical methane potential -- C/N Carbon to nitrogen -- Ca Calcium -- CD Cassava dregs -- CEM Cation exchange membrane -- CO Carbon monoxide -- COD Chemical oxygen demand -- CS Corn straw -- CSTR Continuous stirred tank reactor -- DM Dairy manure -- EC Electrolysis cell -- FT-NIR Fourier transform near infrared -- FW Food waste -- GC Gas chromatography -- HRT Hydraulic retention time -- HSGC Headspace gas chromatography -- IA Intermediate alkalinity -- IR Infrared -- LCFA Long chain fatty acid -- MDC Microbial desalination cell -- MEC Microbial electrolysis cell -- MFC Microbial fuel cell -- MIR Mid-infrared -- NIR Near Infrared -- OLR Organic loading rate -- ORP Oxidation Reduction Potential -- PA Partial alkalinity -- PCA Principal component analysis -- PLS Partial least squares -- PM Pig manure -- PO4 Phosphate -- TA Total alkalinity -- TAN Total ammonia nitrogen -- TIC Total inorganic carbon -- TKN Total Kjeldahl nitrogen -- TOC Total organic carbon -- TOD Total oxygen demand -- TS Total solid -- UASB Upflow anaerobic sludge blanket -- VFA Volatile fatty acid -- VS Volatile solid -- VW Vegetable waste; Anaerobic digestion -- Biogas production -- Process monitoring -- Early-warning indicators -- On-line instrumentation; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2018.12.039
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: Biogas plants can effectively treat organic wastes from various sources and recover energy from biomass for commercial use. However, anaerobic digestion (AD) can suffer from process instability, which can affect efficiency of biogas production. Process monitoring can be used to ensure stable and efficient biogas production process. In recent years, researchers have paid increasing attention to process monitoring as a means of stabilizing anaerobic reactors and ensuring high biogas production. This review of process monitoring of AD focuses on recent progress related to effective early-warning indicators and robust, applicable monitoring methods. A review of the literature revealed that explorations of process monitoring parameters have mainly focused on the metabolic process of AD itself, while the importance of monitoring the feeding substrate as a means of optimizing process stability has not been valued sufficiently. In addition, the application of robust online monitoring methods developed in the laboratory to real-world applications in biogas plants has been limited by high costs. In the future, on the premise of strict cost control, better understanding of the mechanisms underlying AD instability and increased attention focused on online monitoring of the feeding substrate will facilitate optimization of the production process at biogas plants to achieve efficient and stable production. Highlights: AD performance instability is a key operational issue for biogas production. Process monitoring can ensure stable and efficient biogas production. Recent effective monitoring parameters and online monitoring methods are reviewed. Monitoring parameters of feeding substrate can enable optimization of process stability. High cost is the major factor limiting wide application of online monitoring methods.