The present invention relates to a mushroom production process comprising the steps of preparing a mushroom growing shed with at least one bed of mushroom compost; supplying heat to the mushroom growing shed; harvesting the mushrooms; and removing the spent mushroom compost from the mushroom growing shed; wherein the process further comprises the steps of combusting the spent mushroom compost in an energy conversion system; harnessing the heat generated by combusting the spent mushroom compost; and using the harnessed heat to control temperature of the mushroom growing shed. In this way, the energy costs for the mushroom production are greatly reduced.
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