Urban and industrial wastewater treatment plants are designed to meet pre-defined production needs. In many cases, and often unexpectedly, these facilities have to cope with the increased production of sludge that requires a quick and efficient solution. The rental of a mobile dewatering unit allows immediate action for the time necessary to restore the normal situation without resorting to large investments or solutions that may be more costly such as removing liquid sludge. The work on site allows to reduce the volume of sludge and to have the peace of a service that answers permanently to assure the continuity of the production and the protection of the environment.