Artelia deploys proven know-how in this field to help clients select processes and implement the developments that most closely match their present and future needs (reduction at source, collection service, waste collection centres, sorting centres, reuse for energy through incineration and methanisation, composting, recycling, landfill, ultimate waste storage site, etc.). As Artelia has found in numerous countries, controlling solid waste, the quantity and diversity of which is growing constantly, is inseparable from controlling waste water. It calls for a comprehensive approach to the questions of collection, sorting and recycling, and has to take into account a range of major institutional, economic and financial constraints.