ABSTRACT
Geotextile tubes are a technology used in different sectors, such as water supply and sanitation, mainly in the final stage, to dewater the sludge generated in wastewater and water treatment plants. This paper presents geotextile tubes at the beginning of the water supply system (i.e. catchment). This paper shows a large-scale remediation project that used geotextile tube dewatering technology to desand the stream where part of the water catchment of São Carlos city – (São Paulo, Brazil) is carried out. This paper aims to present the system's hydraulic performance and the geotextile degradation. The effluent quality throughout the operation was monitored. Granulometric distribution at different heights of the filter cake is presented to better understand the deposition of particles inside the geotextile tube during the dewatering process. Decreases were observed in the geotextile's tensile strength and permittivity properties after application.
