Geotube® technology was the solution implemented in an urban Wastewater Treatment Plant to respond to the significant increase in the sludge volume that inflew  in the wastewater treatment process during the hottest months in Portugal. Geosin supplies and supervises the implementation of the global solution, from materials dedicated to soil sealing to the sludge dewatering technique. This technique allows the sludge confinemnet and storage at the same time.