An initial assessment of spent mushroom compost as a potential energy feedstock
2001
Williams, B.C. | McMullan, J.T. | McCahey, S.
The Irish mushroom industry has expanded rapidly in the last decade, particularly in the border counties. Its success has generated concern, however, as the production of spent mushroom compost (SMC) has increased. Until recently, SMC as an agricultural waste has been disposed of without due consideration to the environment. As County Councils increasingly address river pollution, restrictions will prevent expansion of the mushroom industry without an SMC waste management solution. This paper looks at the availability and composition of SMC and considers its potential as an energy feedstock. Variability in SMC composition was investigated by sampling from various locations over several months. Analyses showed that, on a dry ash free basis, SMC has a calorific value equivalent to sewage sludge which has been successfully fired for many years. Compositional analysis confirmed the dry fuel as consistent in make-up and showed the moisture content to vary within 60-77%, on an as-received basis.
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