Valorization of carbonatation lime and household waste by production of compost: solution for a sustainable development

The aim of this work was to study the possibility of valorization of the carbonatation lime from the sugarbeet industry by production of compost using in the same time the excess of bagasse from the cane sugar industry together with household waste (organic materials). Three experiments were conducted: in the first experiment the carbonatation lime (dry substance content 83.7%) at a content of 32% was composted with bagasse (DS 89.3%) and household waste (DS 13.4%), while in the second experiment the compost did not contain the carbonatation lime (only bagasse and household waste in the same proportions). In the third experiment the concentration of carbonatation lime in the mixture (carbonatation lime bagasse household waste) was increased to 50%. After 75 days of composting with natural aeration, a good evolution of the temperature for all the composts was observed. In the final step of composting, all composts have pH values of 8.0-8.5 and the ratio of carbon/nitrogen was reduced to the recommended value. The compost with carbonatation lime could be used as fertilizer for the Moroccan soils.