The valorization of crop residues could constitute an energy source (biogas) allowing to reduce the energy needs of populations in agricultural regions, improve their living conditions and slow down deforestation as well as greenhouse gas emissions. This work aims to determine the typology of agricultural waste in the departments of Soubré, Sassandra, Daloa and Issia, to determine the number of residues generated in these departments, and to assess the biogas potential of these departments said residues. Field observations were made to identify the different types of waste, then, based on agricultural statistical data from the Ministry of Agriculture and biogas productivity indexes, the quantities of agricultural residues and biogas were estimated. Agricultural residues consist of pods (50%), stalks (19%), cobs (3%), Straws (8%), stalks (2%), shells (9%), fibers (7%), husks (1%), and bunches (1%). In addition, these localities have 465266.3 t of pods, 173583.2 t of stalks, 84280.0 t of shells, 75,857 t of straws, 12,000 t of husks, 10,987 t of bunches and 6793.0 t of fibers. The departments of Soubré, Sassandra, Daloa and Issia contain a total potential energy of 235.87 × 10 6 m 3 of biogas. However, this is unevenly distributed among the localities. The volume of biogas recorded is higher in the department of Soubré (74.91 × 10 6 m 3 ) which is followed respectively by the departments of Daloa (62.27 × 10 6 m 3 ), Issia (52.77 × 10 6 m 3 and Sassandra (45.93 × 10 6 m 3 ). The departments of Soubré, Sassandra, Daloa and Issia have a very large potential for the production of agricultural residues that

The management of crop waste remains a major concern in countries with high agricultural potential such as Côte d'Ivoire, due to the pollution of environmental components resulting from its poor management. This work aims to set up a waste exchange to provide real information on crop residues produced in the departments of Soubré, Sassandra, Daloa and Issia to operators wishing to recover them. The modeling of the system was carried out following the approach of the MERISE method which is characterized by three levels: Conceptual, Logical and Physical. The interface of the exchange was developed with the PHP language. The software implemented uses the database that we have implemented in accordance with the data model that we have created. This software effectively takes into account the modules of a waste exchange. It guarantees data security and minimizes possible errors. The stock exchange database was generated by a Relational Database Management System (RDBMS), designed around the concepts of the SQL language. The waste exchange is available. It can be consulted through a user-friendly homepage. It can provide real-time information to all economic operators wishing to recover crop residues, it displays offers, gives the possibility of contacting the residues holder. The departments of Soubré, Sassandra, Daloa and Issia have a very great potential for the production of agricultural residues that may be of interest to economic operators for recovery in processing units or "recovery units".