Remoção de matéria orgânica e sulfato utilizando filtros biológicos não aerados no tratamento de água cinza clara

• Ano de defesa: 2015
• Autor(a) principal: Freitas, Jeaninna dos Santos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Ambiental; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Ambiental
• Palavras-chave em Português: Greywater; Removal; Organic matter; Sulfate; Biological anaerobic filters; Filtros biológicos não aerados; Remoção; Águas cinzentas (Resíduos de águas domésticas); Matéria orgânica; Sulfatos; Digestão anaeróbia; Engenharia Sanitária; 628
• Link de acesso: http://repositorio.ufes.br/handle/10/10312

The anaerobic treatment of greywater has gained prominence in research in Brazil. This is because of its good efficiency in the removal oforganic matter, and has a low cost of construction and operation as compared to other systems.The studiedsystemtreats thegreywater of a building located in the UFESUniversity, using two Biological AnaerobicFilters (FBNA), up flow connected in series, in order to investigate the removal efficiency of organic matter and sulfate. For monitoring,sampleswere collected twice a week, fromgreywater tank and effluent filters. The analyses were based on Standard Methods for the Examination of the procedures of Water and Wastewater. The effluent presented a clarifiedaspect, demonstrating removal of suspended solids. The results of COD and BOD5,20showed the same trend, with the best efficiency observed with HRT operation of 1.09 hduring step 1. The low COD/sulfate ratio indicates that biological anaerobic filters operated with sulfidogeniccondictions, resulting in production of hydrogen sulfide, which can be found in the gas phase or precipitate in the sludge. Upon mass balance for COD, it was noted that the HRThas significant influence on the balance of COD. In relation to the sulfur mass balance, most of this element came out with the effluent. Microscopic visualization showed some diversity in the biological system, indicating stability of the treatmentand,the use of a 96-well microplate method showed the presence of microorganisms sulfatereducersin samples of greywater, sludge and effluent of biological anaerobicfilters.