Increasing nutrition of oyster mushrooms using waste coffee grounds

Abstract

This research is aimed to improve the nutritional oyster mushrooms with waste coffee grounds. The coffee grounds contain high nitrogen, a key component of the plant growth, phosphorus, potassium and other substances that enhance the development of mushrooms. The coffee grounds were used to be substrate of a gray oyster mushroom which produced by the Department of Agriculture. Mushroom cultivated materials were combined waste coffee grounds with sawdust as the ratio of 50:50, 25:75 and 0:100 (control). The results showed that the mushroom grown on the material ratio of 50: 50 gave two-folds higher protein content as compare to that of 100% sawdust. Furthermore, the mushrooms grown on material with the ratio of 25:75 gave 51% lower calories than that of sawdust. In addition, oyster mushroom yields were higher than those of sawdust alone, up to 19-110 %. Thus, it is indicated that the waste coffee ground is suitable material for growing a gray oyster mushroom and can be replaced the sawdust because of producing higher nutritive value oyster mushroom, novel substrate of mushroom and high value added of waste coffee ground materials including reduce a problem of refuse many thousands tons of coffee ground waste.