Mag Geisielly Alves Guimarães,Denise De Carvalho Urashima,Delma de Mattos Vidal, Centro Federal de Educação Tecnológica de Minas Gerais, Engenharia Civil, urashima@civil.cefetmg.br
Abstract
One of the present problems that are affecting the Brazil and the world is a result of impacts from the production of waste and tailings as sub-products of estate, materials and services, especially about their treatment and subsequent disposal. In particular, the wastes (‘slurry’) generated in the process of water potabilization are produced in large quantity and its incorrect disposal in the environment leads harmful impacts, besides the existence of legal restrictions to its release into the environment. At the same time, some stations Water Treatment Plants (WTP’s) in Brazil have presented solutions that aim the minimizing the amount of residue generated their treatment and correct disposal. Therefore, research about its proper treatment and disposal has become necessary and of great importance. The technique of dewatering waste with high content of liquid compared to solids using geotextiles has been presented as an efficient and feasible solution from the technical and economic standpoint for volume reduction of waste to be disposed. Thereby, it appears as a contribution to questions about the disposal of waste generated by human activities in different segments, or even their reuse in distinct sectors. This research aims contribute in the study on analysis of the behavior and technical feasibility of dewatering waste generated in the potabilization of water in closed systems with geotextiles in real situations of filling. The evaluation system was based on the formulations proposed in the literature and the analysis of results has shown to be promising the technology studied in the dewatering fine-grained wastes with high resistance to filtration, which can be used as a single system or as improvement of the system already existent.
Keywords: Dewatering, geotextiles, environmental impacts