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The aim of the present study is the characterisation of the household and assimilated wastes generated by two university residences (Ex Habitat and Hasnaoua), both located in TIZI-OUZOU (Algeria), to know their typologies and quantities for better management. The results show that the organic wastes represent the dominating fraction with 87,95% in the Ex-Habitat and 96,57% in Hasnaoua 2. The ratio was 0,29kg/person/day for the first university residence and 0,22% for the second one. Two methods of composting were used to treat large quantities of organic waste in-situ: in piles and composters thus to prevent them from being sent to the Oued-Falli landfills (Tizi-Ouzou). The composting process monitoring allowed us to get satisfying results using olive pomace, sawdust, dry tree leaves and cardboard paper as a carbon input. The highest temperatures were obtained with olive pomace, sawdust and dry leaves, indicating a good progression of the degradation process of the biowaste mixed withthese carbonaceous materials. As for paper/cardboard, the results show a less intense microbial activity where the maximum temperatures did not exceed 37.5°C in the piles and composters where the biowaste was mixed with this carbon input. These results allow us to conclude that paper/cardboard as a carbon input is not recommended because its presence in the substrate prevents the smooth running of the composting process: poor oxygen circulation, which slows down the degradation of the biowaste and produces foul odours. [ABSTRACT FROM AUTHOR]