Mathematical modeling of the anaerobic digestion in two-stage system with production of hydrogen and methane including three intermediate products

Chorukova, Elena; Stupia, Ivan

doi:10.1016/j.ijhydene.2019.01.228

Cited by 22 publications

(11 citation statements)

References 9 publications

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“…flow rates present extrema (maxima) in the admissible range of the control input (D 1 ) for different values of the main perturbation -in 0 S [12,14,15]. The new idea for calculating the optimal ratio of the working volumes of both bioreactors is based on the possibility to assure operating of both bioreactors in the points of maximal biogas (hydrogen and methane) production:…”

Section: Methodsmentioning

confidence: 99%

“…They represent dependencies of the main process variables from the dilution rates. The static characteristics for MODEL1 and for MODEL5 are shown in Chorukova and Simeonov [12].…”

Section: Static Characteristics Of Br 1 and Brmentioning

confidence: 99%

“…One of the parameters to be optimised for TSAD is the ratio of the working volumes of both bioreactors used. A number of models describing the fermentative hydrogen production and the AD for methane production are known but only few models of TSAD processes are offered [12]. Although modelling of two-stage anaerobic digestion using the IWA Anaerobic Digestion Model No 1 (ADM1) is presented by Blumensaat and Keller [13], the described AD process is not real TSAD process because methane is obtained from both bioreactors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Volumes Ratio Optimization in a Cascade Anaerobic Digestion System Producing Hydrogen and Methane

Chorukova

Stupia

Kabaivanova

2021

Ecological Chemistry and Engineering S

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As focus of humans has turned to renewable energy, the role of anaerobic digestion has started to become economically viable. Reducing the volume of agro-wastes for the generation of gaseous and liquid fractions with energy carriers and valuable products is an enormous challenge. A two-stage anaerobic digestion process consisting of hydrogenic stage followed by methanogenic stage was studied in a laboratory scale. Five simple nonlinear models of this continuous cascade process were studied in order to determine the optimal ratio of working volumes of bioreactors, in view of maximising energy production. This ratio was reported for all adopted models. The optimal ratio (maximal energy production criterion) depends of the adopted mathematical model. Static characteristics of both bioreactors were obtained using Symbolyc toolbox of Matlab. Numerical experiments concerning dynamics of the main variables of both bioreactors for these models using Simulink of Matlab are performed for different step changes of the dilution rate of the first bioreactor, together with the influence of the substrate (acetate) inhibition for one of the models. The value of the constant of inhibition plays an important role on the admissible interval of the dilution rate. The developed idea could serve for optimally designed experiments of anaerobic digestion for production of hydrogen and methane from lignocelluloses wastes (wheat straw) in two phase process.

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Section: Methodsmentioning

confidence: 99%

“…They represent dependencies of the main process variables from the dilution rates. The static characteristics for MODEL1 and for MODEL5 are shown in Chorukova and Simeonov [12].…”

Section: Static Characteristics Of Br 1 and Brmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Volumes Ratio Optimization in a Cascade Anaerobic Digestion System Producing Hydrogen and Methane

Chorukova

Stupia

Kabaivanova

2021

Ecological Chemistry and Engineering S

Self Cite

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“…We also mention the mathematical model considered in [31], which also added the hydrolysis step in the model. It is also worth mentioning the models of AD that include the evolution of biogas and hydrogen [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Best Operating Conditions for Biogas Production in Some Simple Anaerobic Digestion Models

Sari

2022

Processes

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We consider one-step and two-step simple models of anaerobic digestion that are able to adequately capture the main dynamical behaviour of the full anaerobic digestion model ADM1. We do not consider specific growth functions. We only require them to satisfy certain qualitative assumptions. These assumptions are satisfied for concave growth functions, but they are also satisfied for a large class of growth functions found in many applications. We consider the maximisation of the biogas production with respect to the operating parameters of the model, which are the dilution rate and the substrate input concentration. We give the best operating conditions and we describe them as a subset of the set of operating parameters. Our models incorporate biomass decay terms, corresponding to maintenance. Numerical plots with specified growth functions and biological parameters illustrate the obtained results.

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“…In this AD system, hydrogen can't be detected as it is consumed immediately by hydrogenotrophic methanogens to produce methane (CH 4 ) and carbon dioxide (CO 2 ) 14. By dividing the AD process into two stages of hydrogen production and methanogenesis, the considered AD system can completely utilize the organic acids produced during dark fermentation and improve the overall energy conversion efficiency [9,23].…”

Section: Introductionmentioning

confidence: 99%

Kalman Filter based Newton Extremum Seeking Control for Maximum Gases Production Rates of Anaerobic Digestion Process

Wang

Tian

et al. 2020

ITC

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This paper proposes a Kalman filter (KF) based Newton extremum seeking control (NESC) to maximize production rates of hydrogen and methane in anaerobic digestion process. The Kalman filtering algorithm is used to obtain more accurate gradient and Hessian estimates which makes possible to increase the convergence speed to the extremum and to eliminate input and output steady-state oscillations. The simulation examples demonstrate the performances of the proposed approach.

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Mathematical modeling of the anaerobic digestion in two-stage system with production of hydrogen and methane including three intermediate products

Cited by 22 publications

References 9 publications

Volumes Ratio Optimization in a Cascade Anaerobic Digestion System Producing Hydrogen and Methane

Volumes Ratio Optimization in a Cascade Anaerobic Digestion System Producing Hydrogen and Methane

Best Operating Conditions for Biogas Production in Some Simple Anaerobic Digestion Models

Kalman Filter based Newton Extremum Seeking Control for Maximum Gases Production Rates of Anaerobic Digestion Process

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