The Cultivation of the edible mushrooms Pleurotus ostreatus on spent ground coffee was studied with the purpose of evaluating its potential as a treatment method for the valorization of this coffee waste. Its nutritional composition of macro and micronutrients was also evaluated as a quality control, to verify that the food product (oyster mushrooms) is of high nutritional value and free of toxic substances for human consumption. The influence of the amount of mycelial seed on the efficiency of production of the edible mushrooms was investigated, obtaining an optimal quantity between 10 and 20 % (g seed /100 g wet substrate) with a biological efficiency of roughly 60 %. The protein value was of 47.3 % on dry sample, with a high-water content (~ 90 %) and a low content in carbohydrates (5.4 %) and fats (0.2 %) in fresh sample. The analysis of microelements in the oyster mushrooms shows th...

The mushroom Pleurotus ostreatus also called oyster mushroom is widely cultivated for its nutritional value, as well as, for its different health benefits and for its values in remediation. Laboratory N° 11 of the Universidad Nacional de Ingeniería of Peru is cultivating P. ostreatus making use of residues of coffee pulp as a substrate. The present work describes the identification of the major phytoconstituents in the apolar fractions of the organic crude extrac of oyster mushroom. After the transesterification of a fraction rich in fatty acids, the palmitic acid methyl ester was identified as the majority and of a second fraction were identified of the steroids 5α,8α-epidioxi-24(R)-metilcolesta-6en-3β-ol and 5α,8α-epidioxi-22E-ergosta-6,22-dien-3β-ol. The compounds were identified by gas chromatography analysis coupled to a mass spectrometer and by nuclear magnetic resonance of...

The mushroom Pleurotus ostreatus also called oyster mushroom is widely cultivated for its nutritional value, as well as, for its different health benefits and for its values in remediation. Laboratory N° 11 of the Universidad Nacional de Ingeniería of Peru is cultivating P. ostreatus making use of residues of coffee pulp as a substrate. The present work describes the identification of the major phytoconstituents in the apolar fractions of the organic crude extrac of oyster mushroom. After the transesterification of a fraction rich in fatty acids, the palmitic acid methyl ester was identified as the majority and of a second fraction were identified of the steroids 5α,8α-epidioxi-24(R)-metilcolesta-6en-3β-ol and 5α,8α-epidioxi-22E-ergosta-6,22-dien-3β-ol. The compounds were identified by gas chromatography analysis coupled to a mass spectrometer and by nuclear magnetic resonance of...