A novel mathematical model of solid-state digestion |
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Authors: | Duncan J Martin |
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Institution: | (1) School of Chemical, Environmental & Mining Engineering, University of Nottingham, University Park;(2) Nottingham, NG7 2RD, UK |
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Abstract: | The proposed model of solid-state digestion assumes the development of a distinct zone of depleted waste around each viable seed particle. Biodegradation is envisaged to occur chiefly in thin shells at the interface between depleted and raw waste, at a rate proportional to the interfacial area. These shells are estimated to expand at a constant 5 cm/year. The reaction thus accelerates following a square law until neighbouring shells meet. Deceleration is then rapid as the shells merge. The proposed model agrees with available lysimeter data; first-order decay kinetics do not. |
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Keywords: | biogas digestion landfill model waste |
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