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Airflow in Passively Aerated Compost

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:   No Citation available.
Authors:   Shouhai Yu, O Grant Clark, Jerry J Leonard

Abstract: Passive aeration systems are more economical than active aeration systems and deliver similar performance, but mathematical descriptions of the process are inadequate for use in its design or optimization. Therefore, a practical analytical model of airflow development in passively aerated compost was developed. The model relates the physical characteristics and temperature of the compost with the predicted passive, convective air flow. The effect of compaction on the permeability of the compost was considered in the application of the model. The model was verified using temperature time series data from a passively aerated composting experiment as inputs, and the calculated results were not significantly different from the measured values (p = 0.97).

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