GESTION DES DECHETS DE DEMOLITION A LA PHASE PREPARATOIRE SUR LE SITE DU PROJET DE CONSTRUCTION DU POLE AGROALIMENTAIRE DES AGGLOMERATIONS DU GRAND NOKOUE

In Benin, the management of demolition waste is still not done efficiently. Which constitutes a handicap for environmental and human health. This research aims to analyze the management of demolition waste in the Wholesale market in Kansounpka in the Municipality of Abomey-calavi. The methodological approach adopted in this research revolves around the collection of data, their processing and the analysis of the results. Documentary research and fieldwork are the main techniques used for data collection. In total, 42 people were investigated in this work. The data was collected using a questionnaire, an interview guide and an observation grid. These collected data were processed manually and using computer tools and the results were analyzed with the PEIR model. Analysis of the results from field investigations reveals that seven (07) types of waste were identified during the demolition of the site housing the Wholesale market in Kansounpka. These are rubble (46 m3), sand from the embankments of destroyed buildings (1338 m3), sheet metal debris (3 m3), iron bars (29 m3), wood debris (38 m3) , tree felling debris (27 m3) and pipe debris (5 m3). The management of this waste is done according to two methods, in particular, making it available to populations (71%) and direct reuse (29%). Furthermore, waste from demolition has a negative impact on the environment. Indeed, 90% of local residents interviewed revealed that waste from demolition seriously pollutes the environment, 70% of them think this demolition negatively affects biodiversity and 2% believe that soil and water are polluted by this waste. These results therefore show that the waste resulting from the demolition of the Gros market site in Kansounpka negatively influences the environment and in view of this information, suggestions were made in this research in order to better manage, in the future, these types of waste.