Contribuição ao estudo e modelagem matemática de reator anaeróbio de leito granular expandido (EGSB) tratando água residuária de suinocultura

• Ano de defesa: 2014
• Autor(a) principal: Correia, Gleyce Teixeira
• Orientador(a): Kwong, Wu Hong
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Carlos
• Programa de Pós-Graduação: Programa de Pós-Graduação em Engenharia Química - PPGEQ
• País: BR
• Palavras-chave em Português: Biotecnologia; Tratamento anaeróbio; Efluentes de suinocultura; Modelagem matemática; Reator anaeróbio granular de leito expandido
• Palavras-chave em Inglês: Anaerobic treatment; Swine wastewater; Mathematical modelling; EGSB reactor
• Área do conhecimento CNPq: ENGENHARIAS::ENGENHARIA QUIMICA
• Link de acesso: https://repositorio.ufscar.br/handle/ufscar/3957

Anaerobic systems have been widely studied and used in treatment of wastewater from agriculture and others. Among the existing technologies, there are the EGSB (Expanded Granular Sludge Bed) reactors, which have emerged as improvement of UASB (Upflow Anaerobic Sludge Blanket) reactors. It was sought to evaluate the performance of an EGSB reactor using synthetic swine wastewater as substrate, increasing the volumetric organic load (2, 4, 8, 10 and 15 kgCOD.m-3.d-1) and the upflow velocity (6 and 10 m.h-1). Efficiencies higher than 83% were obtained in removal of COD, however there was a buildup of volatile acids and a possible microbial imbalance after the application of the load 10 kgDQO.m-3.d-1. The reactor showed homogeneity in microorganisms along the reactor, with the presence of bacilli of different sizes, coccus, and similar to the genera Methanosaeta and Methanosarcina. It was developed a mathematical model aiming to study in more detail the hydrodynamics of EGSB, generally regarded as continuous complete mix reactors (CSTR). For that, it was used a phenomenological model based on the mass balance of the reactor, and after the adjustment to the experimental data, it was observed that the EGSB reactor can be worked as a series of five continuous complete mix reactors (CSTR), three in the tube region and two in the separator region with kinetic intrinsic rate at approximately 7,5.10-5 L.mgSSV-1.h-1 and kinetic rate constant decreasing with increase in organic load.