Modelling Anaerobic Digestion Processes

Batstone, Damien J.; Rodríguez, Jorge

doi:10.1142/9781783267910_0007

Cited by 6 publications

(12 citation statements)

References 70 publications

(81 reference statements)

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“…The hydrolysis constants k h of NP and AAS manure fibers were calculated by fitting a 1st order model to the CH 4 production of biochemical methane potential (BMP) tests, as described in Lymperatou et al [11]. Based on the k h calculated, the following equation was used for predicting the CH 4 yield of manure fibers in continuous AD [24]:…”

Section: Theoretical Calculations and Assumptionsmentioning

confidence: 99%

Improving the Anaerobic Digestion of Swine Manure through an Optimized Ammonia Treatment: Process Performance, Digestate and Techno-Economic Aspects

et al. 2021

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Swine manure mono-digestion results in relatively low methane productivity due to the low degradation rate of its solid fraction (manure fibers), and due to the high ammonia and water content. The aqueous ammonia soaking (AAS) pretreatment of manure fibers has been proposed for overcoming these limitations. In this study, continuous anaerobic digestion (AD) of manure mixed with optimally AAS-treated manure fibers was compared to the AD of manure mixed with untreated manure fibers. Due to lab-scale pumping restrictions, the ratio of AAS-optimally treated manure fibers to manure was only 1/3 on a total solids (TS) basis. However, the biogas productivity and methane yield were improved by 17% and 38%, respectively, also confirming the predictions from a simplified 1st order hydrolysis model based on batch experiments. Furthermore, an improved reduction efficiency of major organic components was observed for the digester processing AAS-treated manure fibers compared to the non-treated one (e.g., 42% increased reduction for cellulose fraction). A preliminary techno-economic analysis of the proposed process showed that mixing raw manure with AAS manure fibers in large-scale digesters could result in a 72% increase of revenue compared to the AD of manure mixed with untreated fibers and 135% increase compared to that of solely manure.

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Section: Theoretical Calculations and Assumptionsmentioning

confidence: 99%

Improving the Anaerobic Digestion of Swine Manure through an Optimized Ammonia Treatment: Process Performance, Digestate and Techno-Economic Aspects

et al. 2021

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“…The Anaerobic Digestion Model 1 (ADM1) was published in the IWA's Scientific and Technical Report No. 9 and has since become the most relevant model developed for the simulation of anaerobic treatment [6,7]. The ADM1 was designed in such a way that a standard parameter, Chemical Oxygen Demand (COD), and the process configuration of a continuously stirred tank reactor were used to determine the composition of various wastes [8].…”

Section: Introductionmentioning

confidence: 99%

“…of anaerobic treatment [6,7]. The ADM1 was designed in such a way that a standard parameter, Chemical Oxygen Demand (COD), and the process configuration of a continuously stirred tank reactor were used to determine the composition of various wastes [8].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Methane Production through Anaerobic Co-Digestion of Sewage Sludge: A Modified ADM1 Model Approach

Mudzanani,

Phadi,

Iyuke

et al. 2023

Fermentation

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The International Water Association’s (IWA) established Anaerobic Digestion Model No. 1 (ADM1) was created to serve as a backup for experimental findings regarding the actual anaerobic digestion process. The previous model idea was adjusted and used to simulate an anaerobic digestion process in this study. Testing procedures, such as benchmark tests and balance checks, were performed in order to verify the accuracy of the implementation. These measures worked in tandem to ensure that the model was implemented flawlessly and without inconsistencies. The primary objective of this article is to construct a method that is based on the ADM1 for evaluating co-digestion and predicting the performance of the digestion process or methane yield based on the analyzed substrates’ physicochemical properties. Additional equations and simulations have been added to the standard model to create tools for evaluating the feasibility of anaerobic co-digestion. The study’s two most intriguing aspects are the optimal mixture and parameter dependence. The adjusted ADM1 is accurate in predicting the measured values of effluent COD, pH, methane, and produced biogas flows with a reasonable degree of accuracy, according to the validation results. This research shows how to use ADM1 in a wastewater treatment plant and other settings where anaerobic digestion is of interest.

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“…High accuracy of thermodynamic data is a prerequisite of process simulation results obtained from the Gibbs energy minimization method. The biochemical conversion processes are simulated by rate-limitation step models [10], anaerobic digestion No.1 [11], artificial neural networks models [12], and practical biochemical methane potential (PBMP) model [13] in the literature. In this study, the PBMP model is selected for the process of methane production evaluation to assess the performance of an anaerobic digester.…”

Section: Introductionmentioning

confidence: 99%

Simulation and evaluation of utilization pathways of biomasses based on thermodynamic data prediction

Qian

Chen

Zhu

et al. 2019

Energy

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It is important to evaluate the utilization pathways of biomasses as there are different multiple choices for various types of biomasses. A method using the functional exergy efficiency as a unified protocol is proposed to evaluate the effectiveness of energy utilization in three utilization pathways of biomasses: pyrolysis, oxygen gasification and anaerobic digestion. The results show that straws are more suitable than manures used in the pyrolysis process. Functional exergy efficiencies of the oxygen gasification process of six biomasses are all higher than those of the pyrolysis process. The functional exergy efficiencies of the manures have increased, becoming close to those of straws. For the anaerobic digestion process, the functional exergy efficiencies of straws are generally lower than that of manures.Manures with low lignin content (chicken manure in this study) are more suitable as the feedstock of anaerobic digestion process. The functional exergy efficiencies of anaerobic digestion are lower than those of the pyrolysis and gasification processes while the temperature exceeds 850 °C.

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Modelling Anaerobic Digestion Processes

Cited by 6 publications

References 70 publications

Improving the Anaerobic Digestion of Swine Manure through an Optimized Ammonia Treatment: Process Performance, Digestate and Techno-Economic Aspects

Improving the Anaerobic Digestion of Swine Manure through an Optimized Ammonia Treatment: Process Performance, Digestate and Techno-Economic Aspects

Enhancing Methane Production through Anaerobic Co-Digestion of Sewage Sludge: A Modified ADM1 Model Approach

Simulation and evaluation of utilization pathways of biomasses based on thermodynamic data prediction

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