DESAGUAMENTO NATURAL DE LODOS DE UASB UTILIZANDO MANTAS GEOTEXTEIS

Detalhes bibliográficos
Ano de defesa: 2022
Autor(a) principal: Vasconcellos, Atila Pavan
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Espírito Santo
BR
Mestrado Profissional em Engenharia e Desenvolvimento Sustentável
Centro Tecnológico
UFES
Programa de Pós-graduação em Engenharia e Desenvolvimento Sustentável
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufes.br/handle/10/16206
Resumo: Dewatering is a fundamental step in the management of sludge from Waste Water Treatment Plants (WWTP), since it’s responsible for the significative reduction of volume and consequent weight, decreasing costs relative to transport and final disposal of this kind of waste. In this way, this study aims to evaluate the natural dewatering on sludges from a Upflow Anaerobic Sludge Blanket (UASB) reactor, using geotextile materials on drainage systems with different configurations, without chemical conditionings. In this research, initially, sludges from the regions of the bed and the blanket of the UASB reactor, treating municipal sewage, were characterized about their physicochemical properties, their distribution of water fractions, their dewaterability indexes and their rheological behaviour. Later, dewatering tests were realized, being divided in three steps and using three configurations. The first aimed to analyze the influence of the geotextile material used as filter on dewatering process. The second, the comparison of two of the devices used and the third, the assessment of the performance between the integration of the previous systems. Performance indexes were used to evaluate two principal aspects: reduction of free water and the retention of solids, related to the quality of the filtrate. Dewatering tests showed reduction of volume in order of 70% and the sludge cake formed above the geotextile in order of 15% of Total Solids. There was no significant difference in the results about the influence of the geotextile blankets BIDIM RT-21, RT-26 e RT-31 and the Vertical Static Dewaterer (DEV) exhibited the best results among the configurations used in the dewatering devices. The formation of a filter cake above the geotextile was noticed and it is related to the Solid Application Rates (RAS), being capable to influence in a different way the two main aspects evaluated: reduction of volume and the solids capture.