alexa Inferring pathogen inactivation from the surface temperatures of compost heaps.


Journal of Environmental & Analytical Toxicology

Author(s): Turner C, Williams A, White R, Tillett R, Turner C, Williams A, White R, Tillett R

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Abstract A sufficiently high composting temperature should inactivate many common pathogens likely to be present in solid animal waste. Monitoring core temperatures inside compost heaps is not straightforward, which means that heaps are not generally monitored. An alternative is to monitor surface temperatures and use those data to infer core temperatures, and thus whether pathogen inactivation has occurred. This paper describes two methods (thermal imaging and thermocouples) for the measurement of surface temperature, and a modelling approach using time series analysis to predict the temperatures obtained in the core of aerated heaps of composting pig farmyard manure (FYM) from surface temperature data. The model was able to predict core temperatures in the heap quite closely for a period of time for well insulated parts of the heap, although predictions were further from observed values close to the surface of the heap and the aeration pipe. This article was published in Bioresour Technol and referenced in Journal of Environmental & Analytical Toxicology

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