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No. of bitstreams: 1 chaucanes_pam_me_ilha.pdf: 4074329 bytes, checksum: b4e87799b76f0a2635d5a1511a22d2f0 (MD5) Previous issue date: 2017-10-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este estudo mostra o funcionamento dos processos de oxidação de matéria orgânica junto com os processos simultâneos de nitrificação e desnitrificação (SND) dentro do reator aeróbio de leito fluidizado de tubos concêntricos com uma terceira câmara para gerar condições anóxicas (necessárias para garantir o processo de desnitrificação). O reator foi operado por um período de 140 dias, durante o qual a remoção de demanda química de oxigênio (DQO) e de nitrogênio total (NT), atingiu 80% e 44% respectivamente, para um tempo de detenção hidráulica (TDH) de 3 horas. A configuração dos diâmetros dos tubos concêntricos resultou em diferentes relações de áreas e, portanto em diferentes vazões para cada câmara. Na operação do reator foram aplicadas duas relações de vazões alterando o nível de esgoto dentro do reator. Os efeitos destas relações de vazões, alterou a concentração de oxigênio dissolvido (OD) entre os compartimentos aeróbio e anóxico do reator e a relação C:N, as quais foram estudadas durante o funcionamento deste sistema. Os resultados indicaram que a relação de vazões 2(4,8: 3,8: 1 para as câmaras 1, 2 e 3, respectivamente) beneficiou as remoções de DQO e NT. A concentração de OD no compartimento aeróbio apresentou valores médios de 3,57 ± 1,24 mg.L -1 , e no topo da câmara 3, a concentração de OD foi de 1,41 ± 0,78 mg.L -1 . As relações C:N que apresentaram maiores eficiências de remoção de NT foram as superiores a 10, sendo a máxima remoção de T na relação C:N de 17. O tempo de retenção celular (TRC) alcançado no reator foi de 3,16 ± 3,07 dias. Neste trabalho de pesquisa foi concluído que a configuração de três câmaras concêntricas para o reator aeróbio de leito fluidizado beneficia a remoção de NT, tornando este reator uma alternativa para o tratamento de águas residuárias domésticas. / This study shows the operation of the organic matter oxidation processes together with the simultaneous processes of nitrification and denitrification (SND) inside the aerobic fluidized bed reactor of concentric tubes with a third chamber to generate anoxic conditions (necessary to guarantee the denitrification process). The reactor operated over a period of 140 days, during which chemical oxygen demand (COD) and total nitrogen (TN) removal reached 80% and 44% respectively, for a 3 hour hydraulic detention time (HDT). The configuration of the diameters of the concentric tubes resulted in different area ratios and therefore in different flow rates for each chamber. In the reactor operation were applied two flow ratios, altering the sewage level inside the reactor. The effects of these flow rates were changing the concentration of dissolved oxygen (DO) between the aerobic and anoxic compartments of the reactor and the C: N ratio, which was studied during the operation of this system. The results indicated that the ratio of flows 2 (4.8: 3.8: 1 for chambers 1, 2 e 3, respectively) benefited the COD and TN removal. The DO concentration in the aerobic compartment presented average values of 3.57 ± 1.24 mg.L-1 , and on top of chamber 3, the DO concentration was 1.41 ± 0.78 mg.L-1 . The C:N ratios that showed higher nitrogen removal efficiencies were higher than 10, with the maximum TN removal at the C:N ratio of 17. The cell retention time reached (CRT) in the reactor was 3.16 ± 3.07 days. In this research, was concluded that three concentric chambers configuration for the aerobic fluidized bed reactor benefits the TN removal, became this reactor an alternative in domestic wastewater treatment.

Orientador: Tsunao Matsumoto / Resumo: Este estudo mostra o funcionamento dos processos de oxidação de matéria orgânica junto com os processos simultâneos de nitrificação e desnitrificação (SND) dentro do reator aeróbio de leito fluidizado de tubos concêntricos com uma terceira câmara para gerar condições anóxicas (necessárias para garantir o processo de desnitrificação). O reator foi operado por um período de 140 dias, durante o qual a remoção de demanda química de oxigênio (DQO) e de nitrogênio total (NT), atingiu 80% e 44% respectivamente, para um tempo de detenção hidráulica (TDH) de 3 horas. A configuração dos diâmetros dos tubos concêntricos resultou em diferentes relações de áreas e, portanto em diferentes vazões para cada câmara. Na operação do reator foram aplicadas duas relações de vazões alterando o nível de esgoto dentro do reator. Os efeitos destas relações de vazões, alterou a concentração de oxigênio dissolvido (OD) entre os compartimentos aeróbio e anóxico do reator e a relação C:N, as quais foram estudadas durante o funcionamento deste sistema. Os resultados indicaram que a relação de vazões 2(4,8: 3,8: 1 para as câmaras 1, 2 e 3, respectivamente) beneficiou as remoções de DQO e NT. A concentração de OD no compartimento aeróbio apresentou valores médios de 3,57 ± 1,24 mg.L -1 , e no topo da câmara 3, a concentração de OD foi de 1,41 ± 0,78 mg.L -1 . As relações C:N que apresentaram maiores eficiências de remoção de NT foram as superiores a 10, sendo a máxima remoção de T na relação C:N de 17. O te... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This study shows the operation of the organic matter oxidation processes together with the simultaneous processes of nitrification and denitrification (SND) inside the aerobic fluidized bed reactor of concentric tubes with a third chamber to generate anoxic conditions (necessary to guarantee the denitrification process). The reactor operated over a period of 140 days, during which chemical oxygen demand (COD) and total nitrogen (TN) removal reached 80% and 44% respectively, for a 3 hour hydraulic detention time (HDT). The configuration of the diameters of the concentric tubes resulted in different area ratios and therefore in different flow rates for each chamber. In the reactor operation were applied two flow ratios, altering the sewage level inside the reactor. The effects of these flow rates were changing the concentration of dissolved oxygen (DO) between the aerobic and anoxic compartments of the reactor and the C: N ratio, which was studied during the operation of this system. The results indicated that the ratio of flows 2 (4.8: 3.8: 1 for chambers 1, 2 e 3, respectively) benefited the COD and TN removal. The DO concentration in the aerobic compartment presented average values of 3.57 ± 1.24 mg.L-1 , and on top of chamber 3, the DO concentration was 1.41 ± 0.78 mg.L-1 . The C:N ratios that showed higher nitrogen removal efficiencies were higher than 10, with the maximum TN removal at the C:N ratio of 17. The cell retention time reached (CRT) in the reactor was 3.16 ± 3.... (Complete abstract click electronic access below) / Mestre