Gyeonggi Agricultural Technology Institute proves yield and profitability of Pleurotus ostreatus using coffee grounds

Published Oct 2, 2025

Tridge summary

[Korea Farmers' News Agency, Reporter Lee Jang-hee] The Gyeonggi Agricultural Technology Institute revealed that the test results of cultivating Pleurotus ostreatus (oyster mushrooms) with a mixture of coffee grounds showed higher or equal yields compared to conventional substrates, indicating that it can achieve the effect of resource recycling and production cost reduction. Coffee grounds, which are the residue discarded after brewing coffee beans, can be used as a "substrate" for cultivating Pleurotus ostreatus. A "mushroom substrate" is an artificial culture medium used for growing mushrooms, primarily composed of organic materials such as sawdust, rice straw, and rice bran, mixed with water and nutritional supplements, then sterilized before use. Currently, the substrate materials used for mushroom cultivation in the country amount to approximately 1 million tons annually, of which about 600,000 tons

Original content

Gyeonggi Agricultural Technology Institute announced that the results of the shiitake mushroom cultivation test using coffee grounds mixed in the medium showed that the yield was higher or equal to that of the conventional medium, leading to the effect of resource recycling and production cost reduction. Coffee grounds are the residue discarded after brewing coffee beans and can be used as a "medium" for shiitake mushroom cultivation. The "mushroom medium" is an artificial culture substrate used for mushroom cultivation. It is mainly a mixture of organic materials such as sawdust, rice bran, straw, water, and nutritional supplements, which is sterilized and then used. Currently, the medium materials used in domestic mushroom cultivation amount to about 1 million tons annually, of which about 600,000 tons are grain by-products imported from overseas. The Gyeonggi Agricultural Technology Institute conducted research on the mixing ratio and suitability evaluation of shiitake mushroom ...

Source: Agrinet