Biogas plant management decision support – A temperature and time-dependent dynamic methane emission model for digestate storagesEricsson, Niclas; Nordberg, Åke; Berglund, Maria
The aim was to develop a temperature and time-dependent model that can calculate the methane production in an anaerobic digester and its subsequent digestate storage tank under realistic and variable conditions. With a daily resolution, the model was applied to a Swedish dairy farm under two different climatic conditions. The most influential parameters were hydraulic retention time and the substrate specific first order reaction rates in the digester, which have a big influence on the residual biogas potential, and hence the potential methane production in the digestate storage. The management of the storage can have a large impact on the emissions from the storage due to its temperature dependence. The model can be used to support plant design and operation of anaerobic digesters and storages, but further research is needed to determine first-order reaction rates and the relationship between the ambient and digestate temperatures at different times of the year.
KeywordsBiogas; Digestate; Methane; Emissions; Model; Climate impact
Published inBioresource technology reports
2020, volume: 11, article number: 100454
UKÄ Subject classification
Renewable Bioenergy Research
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