Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-22T15:58:11Z No. of bitstreams: 1 AlfredoCostaNeto_DISSERT.pdf: 2022328 bytes, checksum: 2983ffa40c26116372d25ff1ff172621 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T00:26:43Z (GMT) No. of bitstreams: 1 AlfredoCostaNeto_DISSERT.pdf: 2022328 bytes, checksum: 2983ffa40c26116372d25ff1ff172621 (MD5) / Made available in DSpace on 2016-07-28T00:26:43Z (GMT). No. of bitstreams: 1 AlfredoCostaNeto_DISSERT.pdf: 2022328 bytes, checksum: 2983ffa40c26116372d25ff1ff172621 (MD5) Previous issue date: 2016-02-22 / Este trabalho avalia o desempenho de uma Esta??o de Tratamento de Esgotos na modalidade lodos ativados em batelada sequencial, localizada em regi?o de temperatura alta. Tamb?m apresenta a analise da degrada??o da mat?ria org?nica e a avalia??o das condi??es de sedimentabilidade do lodo, atrav?s de reatores em escala de bancada, alimentados com licor misto proveniente da ETE em estudo, com diferentes concentra??es de substrato e biomassa. Os resultados mostraram, a alta efici?ncia e estabilidade do processo de tratamento utilizando RSB para esgotos dom?sticos, mesmo com bruscas oscila??es de carga org?nica e hidr?ulicas. A an?lise dos reatores em bancada, com rela??es A/M pr?-definidas, apresentou o comportamento da sedimenta??o e da biodegradabilidade da mat?ria org?nica para essas concentra??es, situando a rela??o A/M nas condi??es de opera??o atual da ETE e a rela??o A/M ?tima (Concentra??o do Substrato por Concentra??o da Biomassa), cujo tempo de sedimenta??o e de biodegradabilidade da mat?ria org?nica obt?m a m?xima efici?ncia operacional. / This paper evaluate the performance of a Wastewater Treatment Plant (WWTP) in sequential batch activated sludge modality with tertiary treatment step, located in high temperature region. It also presents the analysis of organic matter?s removal and the evaluation of sludge sedimentation conditions through reactors in bench scale, fed with different substrate?s and biomass? concentrations, from the WWTP in study. The results showed high efficiency and stability of the treatment process using Sequential Batch Reactors for domestic sewage, even with sudden changes of organic and hydraulic load, reaching more than 90% of efficiency in the removal of biodegradable organic matter. The removal of organic matter and sedimentation tests in bench reactors showed the good performance in respect of the organic matter?s removal, however, the high concentration of micro-organism results in a lower sludge sedimentation rate, which can compromise the quality of the final effluent. The relation Food/Microorganism in the conditions of the WWTP?s current operation showed a value of 0.06 gCOD/gVSS.d. and zonal sedimentation velocity of 0.59 m/h, the great ratio of the concentration of the substrate by biomass concentration, which obtained the maximum operational efficiency, showed a value of 0.09 gCOD/gVSS.d. and zonal sedimentation velocity of 1.4 m/h.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2015-08-07T22:54:30Z No. of bitstreams: 1 DISSERTA??O - ELIZANGELA ALVES.pdf: 1536264 bytes, checksum: c1cce1e417caa5218324ca2361b41735 (MD5) / Made available in DSpace on 2015-08-07T22:54:30Z (GMT). No. of bitstreams: 1 DISSERTA??O - ELIZANGELA ALVES.pdf: 1536264 bytes, checksum: c1cce1e417caa5218324ca2361b41735 (MD5) Previous issue date: 2013-10-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The absence of treatment and improper disposal of effluents contribute to the deterioration of receiving water bodies. However, among the proposed alternatives for post-treatment of wastewater ponds are to lemnas. These lagoons are capable of capturing the nutrients sewage efficiently and reduce a large amount of suspended solids Also act by inhibiting algae, and generate biomass rich in protein, which has utilities such as animal feed and fertilizer. This research aimed to evaluate and compare the efficiency of the treatment of domestic sewage pond lemnas in two phases, with different hydraulic retention time (HRT). This pond, in phase I, operated with influent volume of 75 liters/day and HDT of 5, 10 and 15 days, while phase II, the volume was increased to 140 liters/day TDH was decreased to 2.7, 5.4 and 8.0 days. The structure of the pond lemna had a volume of 1,125 m3 and surface area of 2.25 m2 (total depth of 0.6 m, 0.5 m water depth, length of 1.5 m and width 1.5 m). Therefore, during the two phases of this research the following parameters were monitored: the wastewater - temperature, pH, biochemical oxygen demand (BOD5), dissolved oxygen (DO), total suspended solids (TSS), phosphorus (P), coliforms thermotolerant in macrophyte - nitrogen (N), phosphorus (P), biomass and crude protein (%). The treatment system performance as presented in polishing domestic wastewater, following the removal efficiency of organic and nutrient load: 80% (phase I) and 66% (phase II) for BOD5, 83% (phase I) and 34% (phase II) for P. The lemnas converts these nutrients into biomass rich in proteins with an average grade of CP% from 27.93%. The production of protein in lemnas throughout the experiment was: 355 g (LMN1), 367 g (LMN2) and 370 g (LMN3). Notably, the ability of the system to treat these waters was higher in phase I, which has the greatest TDH. The presence of algae genus Uronema was found, as well as the competition with these lemna study, but after the modifications aimed at mitigating the temperatures this competition was controlled. With this study, it was possible to evaluate the post-treatment of domestic wastewater, the limiting factors for this system and the biomass of Lemna valdiviana Phil., under the climatic conditions of Feira de Santana, Ba. Finally, we conclude that there is potential for nutrient recovery of these waters, as well as reuse of biomass produced as a possible source of animal feed and income. / A aus?ncia de tratamento e a disposi??o inadequada de efluentes dom?sticos contribuem para a deteriora??o de corpos receptores. Por?m, dentre as alternativas propostas para o p?s-tratamento de ?guas residu?rias est?o as lagoas de lemnas. Essas lagoas s?o capazes de captar nutrientes do esgoto com efici?ncia, bem como, reduzir uma grande quantidade de s?lidos em suspens?o. Tamb?m atuam na inibi??o de algas, e geram biomassa rica em prote?nas que tem utilidades como ra??o animal e adubo. Esta pesquisa teve por finalidade avaliar e comparar a efici?ncia do tratamento de efluentes dom?sticos da lagoa de lemnas, em duas fases distintas, e com diferentes tempos de deten??o hidr?ulica (TDH). Essa lagoa, na Fase I, operou com volume de afluente de 75 litros/dia e TDH de 5, 10 e 15 dias, enquanto que na Fase II, o volume foi aumentado para 140 L/d e TDH foi diminu?do para 2,7, 5,4 e 8,0 dias. A estrutura da lagoa de lemna apresentou um volume de 1125 m3 e ?rea superficial de 2,25 m2 (profundidade total de 0,6m, profundidade da ?gua 0,5 m, comprimento de 1,5 m e largura 1,5 m). Para tanto, durante as duas fases dessa pesquisa foram monitorados os seguintes par?metros: na ?gua residu?ria - temperatura, pH, demanda bioqu?mica de oxig?nio (DBO5), oxig?nio dissolvido (OD), s?lidos suspensos totais (SST), f?sforo (P), coliformes termotolerantes; na macr?fita ? nitrog?nio (N), f?sforo (P), produ??o de biomassa e prote?na bruta (%). O sistema de tratamento apresentou como desempenho no polimento de ?guas residu?rias dom?sticas, a seguinte efici?ncia de remo??o de carga org?nica e nutriente: 80% (Fase I) e 66% (Fase II) para DBO5; 83% (Fase I) e 34% (Fase II) para P. As lemnas converteram esses nutrientes em biomassa rica em prote?nas com teor m?dio de PB%, de 27,93%. A produ??o de prote?na em lemnas durante todo o experimento foi de: 355g (LMN1), 367g (LMN2) e 370g (LMN3). Notadamente, a capacidade do sistema em tratar essas ?guas foi maior na Fase I, com maior TDH. A presen?a de algas do g?nero Uronema foi constatada, bem como a competi??o dessas com a lemna em estudo, mas ap?s as modifica??es que visaram amenizar as temperaturas essa competi??o foi controlada. Com a realiza??o deste estudo, foi poss?vel avaliar o p?s-tratamento de ?guas residu?rias dom?sticas, os fatores limitantes para esse sistema e a produ??o de biomassa de Lemna valdiviana Phil., sob as condi??es clim?ticas de Feira de Santana, Ba. Enfim ? poss?vel concluir que, h? potencial de recupera??o de nutrientes dessas ?guas, assim como de reaproveitamento da biomassa produzida, como poss?vel fonte de alimenta??o animal e de renda.