Mathematical modelling of the composting process: A review

Mason, I.G.

doi:10.1016/j.wasman.2005.01.021

Cited by 146 publications

(110 citation statements)

References 36 publications

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“…The values of uncorrected reaction rate constant k' for the first-order kinetic model were 0.0498 day -1 for the first reactor and 0.1026 day -1 for the second reactor. In the reference [9] the values of uncorrected reaction rate constant were 0.0181 to 0.0749 day -1 . In the reference [12] the values of uncorrected reaction rate constant k were 0.043±0.002 day -1 to 0.082±0.011 dan -1 .…”

Section: O M P O S T I N G K I N E T I C S F O R M I X T U R E O F mentioning

confidence: 99%

“…Composting of organic substrates has been studied by numerous researchers in different types of reactors and the self-heating reactor has been widely employed for modeling the heat transfer phenomenon of this process [9]. The self-heating reactor is a reactor relying solely on microbial heat production to reach and maintain process temperatures and having no temperature control besides some external insulation within the apparatus [10].…”

Section: Introductionmentioning

confidence: 99%

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Composting kinetics for mixture of poultry manure and wheat straw based on volatile solids content

Karić

Petrić

Mustafić

2017

J. eng. process. manag.

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The aim of this study was to determine the composting kinetics for mixture of poultry manure and wheat straw based on the volatile solids content. Experimental data was fitted with the first-order and the nth-order kinetic model. The nth-order kinetic model showed better prediction performance than the firstorder kinetic model. For the first-order kinetic model, maximum and mean differences between experimental and simulation results for the content of volatile solids were 5.43% and 3.00%, for the first reactor, and 4.68% and 2.12% for the second reactor, respectively, for the nth-order kinetic model, maximum and mean differences were 4.92% and 1.68%, for the first reactor, and 4.09% and 1.42% for the second reactor, respectively.

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Section: O M P O S T I N G K I N E T I C S F O R M I X T U R E O F mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composting kinetics for mixture of poultry manure and wheat straw based on volatile solids content

Karić

Petrić

Mustafić

2017

J. eng. process. manag.

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“…The composting kinetics is a complex subject and reaction rates can be limited by several factors including moisture content, free air space, oxygen concentration, lack of degradable organics, process temperature, imbalanced pH conditions, lack of inorganic nutrients, lack of microbes, and the toxic substance (Haug 1993;Mason 2006). Therefore, a complete mathematical description of composting kinetics based on first principles is not possible.…”

Section: Process Kinetics and Stoichiometrymentioning

confidence: 99%

“…To overcome this problem in the modeling of composting process, usually the first order kinetics is considered for BVS degradation and the effects of other parameters on reaction kinetics are imposed by empirical relations (Haug 1993). According to Mason review for composting modeling (Mason 2006), first-order kinetics model with empirical corrections for temperature, moisture, oxygen concentration and free air space are generally successful in predicting the evolution of dynamic state variables (temperature, solids, moisture, oxygen and carbon dioxide concentration). Furthermore, using the first-order kinetics model for degradation of organic materials and petroleum hydrocarbons has been previously justified by several authors (Jorgensen et al 2000;Hwang et al 2006;Namkoong et al 2002;Van Gestel et al 2003), among others.…”

Section: Process Kinetics and Stoichiometrymentioning

confidence: 99%

Application of the Haug model for process design of petroleum hydrocarbon-contaminated soil bioremediation by composting process

Khamforoush

Bijan-Manesh

Hatami

2012

Int. J. Environ. Sci. Technol.

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The main scope of this work is applying an aerobic composting model for remediation of petroleum hydrocarbon-contaminated soil. For this purpose, the reaction kinetics was integrated with the mass and energy balances over the composting system. Literature pilot scale data for bioremediation of diesel oil-contaminated soil was used for model validation. Comparisons of simulation results with experimental data for diesel concentration and oxygen concentration showed good agreement during the remediation process. With validated model for bioremediation of diesel oil-contaminated soil, the influence of amendment type, bulking agent, amendment/soil ratio, bulking agent/soil ratio, moisture content and airflow rate were investigated on diesel biodegradation. The simulation results showed that maximum degradation of diesel occurred in the presence of yard waste as amendment. Furthermore, addition of bulking agent (wood chips) increased the diesel degradation about 6 %. In presence of yard waste as amendment and wood chips as bulking agent, the optimal values for maximum remediation were amendment/soil ratio (2.5 kg kg -1 ), bulking agent/soil ratio (2.25 kg kg -1 ), initial moisture content (62.5 %) and airflow (0.520 m 3 day -1 kgBVS -1 ).

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“…Composting of organic substrates has been studied by several researchers in different types of reactors (Mason, 2006) and the self-heating reactor has been widely employed for modeling the heat transfer phenomenon of this process. The self-heating reactor is a reactor relying solely on microbial heat production to reach and maintain process temperatures and having no temperature control besides some external insulation within the apparatus (Mason and Milke, 2005).…”

Section: Introductionmentioning

confidence: 99%

Modeling Heat Loss during Self-Heating Composting Based on Combined Fluid Film Theory and Boundary Layer Concepts

Mudhoo

Mohee²

2008

J ENV INFORM

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ABSTRACT. The overall heat-transfer coefficients (U-values) developed during the self-heating composting of mixed vegetables and chicken manure were determined based on a combined fluid film theory and thermal boundary layer concept. The heat flow was modeled into four heat transfer components. The heat transfer mechanisms have been modeled as comprising two conductive heat fluxes across the compost matrix and compost reactor walls, one heat flux across the film of water condensing on the inner reactor surface and a convective heat flux due to free convection on the outside surface of the reactor walls. Individual film heat-transfer coefficients have been calculated using a series of dimensionless correlations grouping the outer reactor surface temperature, the Nusselt (Nu), Prandtl (Pr), Grashof (Gr) and Rayleigh (Ra) numbers. Gr has varied between 5.11 × 10 6 and 3.71 × 10 9, Pr from 0.692 to 0.712, and Ra from 3.64 × 10 6 to 2.56 × 10 9 . Four different equations have been used to evaluate the heat transfer coefficients characterizing the heat flow due to free convection. The maximum U-values have been found to vary between 0.368 and 0.387 W/m 2 ·K, and the minimum U-values have ranged from 0.255 to 0.288 W/m 2 ·K. A 4-parameter Weibull model was found to describe the variation of U-value with compost matrix temperature reliably with R 2 = 0.9999.

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Mathematical modelling of the composting process: A review

Cited by 146 publications

References 36 publications

Composting kinetics for mixture of poultry manure and wheat straw based on volatile solids content

Composting kinetics for mixture of poultry manure and wheat straw based on volatile solids content

Application of the Haug model for process design of petroleum hydrocarbon-contaminated soil bioremediation by composting process

Modeling Heat Loss during Self-Heating Composting Based on Combined Fluid Film Theory and Boundary Layer Concepts

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