expulsion of the stemms after the grapes have been squeezed

stalk expulsion stemm pile container waste recovery management cellulose hemicellulosic lignin tannins economic source nonedible material biofuels paper manufacturing biocomposites composting biosorbents cellulosic pulps enzymes squeezed garbage processing winery cellar factory plant industrial area winemaking industry wine machinery metal agribusiness food products outdoors conveyor vertical viticulture production business activity transformation transportation equipment distillery