Abstract
Physico-chemical and microbiological aspects were studied during composting of grape pulps. Cellulose and hemicellulose were hydrolysed to 13.5% and 25% respectively, lignin was not attacked. The succession of microbial populations in the mass was determined. The initial microorganisms were comprised exclusively of fungi and yeasts. The increase of temperature and pH led to their disappearance and they were replaced by bacteria that appeared to be mainly responsible for the degradation of organic matter.
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