Kinetic parameter estimation model for anaerobic co-digestion of waste activated sludge and microalgae. (March 2017)

• Record Type: Journal Article
• Authors: Lee, Eunyoung; Cumberbatch, Jewel; Wang, Meng; Zhang, Qiong
• Is Part Of: Bioresource technology. Volume 228(2017)
• Page Start: 9
• Page End: 17
• Publication Date: 2017-03
• Subjects: Anaerobic co-digestion -- Microalgae -- Waste activated sludge -- Kinetic parameter -- First-order kinetic model -- Monod model; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.12.072
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Kinetic parameter estimation models were proposed for anaerobic co-digestion. The models considered co-substrate ratios and single substrate kinetic parameters. The models were used to determine the first-order kinetic and Monod coefficients. The models could estimate kinetic parameters for the microalgae-WAS co-digestion. Abstract: Anaerobic co-digestion has a potential to improve biogas production, but limited kinetic information is available for co-digestion. This study introduced regression-based models to estimate the kinetic parameters for the co-digestion of microalgae and Waste Activated Sludge (WAS). The models were developed using the ratios of co-substrates and the kinetic parameters for the single substrate as indicators. The models were applied to the modified first-order kinetics and Monod model to determine the rate of hydrolysis and methanogenesis for the co-digestion. The results showed that the model using a hyperbola function was better for the estimation of the first-order kinetic coefficients, while the model using inverse tangent function closely estimated the Monod kinetic parameters. The models can be used for estimating kinetic parameters for not only microalgae-WAS co-digestion but also other substrates' co-digestion such as microalgae-swine manure and WAS-aquatic plants.