O relevo e o sistema de afastamento e tratamento de esgoto da cidade de Marília-SP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação do potencial de reuso agrícola do efluente de uma estação de tratamento de esgoto com alagados construídos

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Desenvolvimento e avaliação de uma miniestação ecoeficiente de tratamento de esgoto e reuso de águas, com sistemas registrador queimador, para baixa vazões de biogás e cogeração de energia

Pós-graduação em Engenharia Mecânica - FEG

Sistema de gestão ambiental: subsídios para a implantação em uma estação de tratamento de esgoto a partir da análise crítica de estudos ambientais prévios

The process of environmental impact assessment (EIA), in the extent of previous environmental studies, has as one of its functions to provide subsidies to the actions of environmental managment of enterprises. However, the proper estructuring of programs that allows to support this managment does not often occurs. This research sought as one of its objectives to evaluate in which extent the process of EIA can be a subsidie for the EMS, providing basic elements of this system. In addition, more specifically, the research had as one of its objetives the development of subsidies for the implantation of an Environmental Managment System (EMS), based on the model of ISO 14001 (2004), for a sewage treatment plant yet to be constructed in the city of President Venceslau / SP. In order to achieve theses objetives, a discussion was held based on the evaluation of environmental studies available in the library of Cetesb / SMA. Still, for the elaboration of subsidies for the EMS of the treatment plant, the research was focused on the structuring of environmental management program, based on the information contained in its Preliminary Environmental Report (PER). The research had as one of its products, the development of subsidies for the planning and control of the environmental aspects and impacts and for the environmental program of the enterprise, based on the use of environmental indicators. It was concluded, based on the results that, in general, the previous environmental studies analyzed showed little emphasis on the phase of development of structured environmental programs that offer guidelines to achieve the desired results for the environmental performance of the company.

Avaliação do potencial de reuso agrícola do efluente de uma estação de tratamento de esgoto com alagados construídos

The study took place in a sewage treatment plant located at the actual Department of Water and Sewer in Bauru, city of Sao Paulo state. This treatment plant has an average entrance flow of 4.8 l. s-1 made by upflow anaerobic filter, followed by wetland systems constructed in parallel. . As objective of this study we evaluate the effectiveness of three systems of constructed wetlands, with three different types of plants (Lily pond, Giant papyrus and Cattail),quantify, and qualify the effluents at various stages of treatment to monitor their effectiveness and the possibility of reuse in agriculture. There was a satisfactory removal of organic matter, with a mean concentration of 36 and 39mg.l-1 at the , phases 1 and 2 of the operation, respectively. The constructed wetlands effluent nitrogen and phosphate concentrations were high throughout all the system and the removal efficiency of ammonia nitrogen was much lower than expected, then the system is functioning as secondary treatment and not as tertiary treatment. The concentrations of micro-organisms found in the final effluent were also high. Therefore, it is concluded that the results of removal efficiency of organic matter, of constructed wetland systems, meet the parameters required by legislation for effluent discharges but do not attend the parameters required for nitrogen and micro organisms. This way, these analyzed plants effluents are suitable for reuse in agriculture restricted irrigation

Efeitos da aplicação de efluente de tratamento de esgoto na fertilidade do solo e produtividade de pepino sob irrigação subsuperficial

O experimento foi conduzido com o objetivo de avaliar técnicas para a aplicação de águas residuárias na agricultura, proporcionando melhor reutilização de água, recurso natural atualmente escasso e muito mal disponibilizado. Utilizou-se da cultura de pepino (Cucumis sativus L.) em estufa, com oito parcelas irrigadas com efluentes de tratamento de esgoto residencial e oito parcelas irrigadas com água tratada e distribuída pela SABESP (tratamento-testemunha), ambas abastecidas por sistema de irrigação subsuperficial, avaliando-se a produção média por planta, a fertilidade do solo e a disposição de nutrientes na água do solo. Nas análises do solo, verificaram-se maiores teores de P, K e CTC no solo irrigado com efluentes. Nesse mesmo tratamento, constataram-se os maiores teores de N, nitrato, Ca, Mg, Zn e S para as análises da água retida na matriz do solo. Quanto à produção total média por planta, as parcelas irrigadas com efluente apresentaram 2.769,6 g de matéria fresca, superior aos 1.968,6 g verificados no tratamento-testemunha, demonstrando a importância da utilização de efluente de esgoto para o fornecimento de nutrientes e aumento de produtividade.

Análise do aproveitamento energético do biogás produzido numa estação de tratamento de esgoto

Pós-graduação em Engenharia Mecânica - FEIS

Avaliação da ocorrência de fitoestrogenos de soja em efluente de estação de tratamento de esgoto, água superficial e subterrânea da cidade de Araraquara

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito da concentração do meio suporte e relação entre áreas no desempenho de reatores aeróbios de leito fluidizado com circulação interna no tratamento de esgoto doméstico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Características limnológicas e do fitoplâncton de viveiro de criação de tilápia-do-nilo e de wetlands construídas para o tratamento do efluente

Pós-graduação em Aquicultura - FCAV

Estudo da eficiência de estações de tratamento de esgoto - RTE e estações de tratamento de água - ETA na elimnação de resíduos de estrógenos naturais e sintéticos na UGRHI-13 (Tietê-Jacaré)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise termoeconômica de uma mini-estação de tratamento de esgoto com auto-suficiência energética

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação do desempenho de um reator anaeróbio compartimentado no tratamento de esgoto doméstico

Pós-graduação em Engenharia Civil - FEIS

Avaliação da auto-suficiência energética de reatores anaeróbios no tratamento de esgoto sanitário e água cinza

The anaerobic treatment of sewage is widely employed in Brazil and it is an appreciated way for the treatment of effluents, helping to reduce the environmental impact in rivers. The methane gas obtained from the process can be applied to improve the energetic efficiency of the system, reducing the amount of waste and the cost of the treatment process. This work presents the net energy balance of anaerobic reactors applied to the treatment of sewage. The analysis was performed considering full-scale and laboratory-scale treatment systems. In laboratory scale, the results from three kinds of systems were compared regarding the biological treatment of greywater. Two of them (UASB7 and UASB12) were anaerobic and the other one was a combined anaerobic-aerobic system (UASB7/SBR6). Greywater methanization (compared to theoretical maximum) was calculated considering 100% removal (g BOD/day), the literature percentage removal and the anionic surfactant presence in the effluentt. For each of these three cases, the efficiencies were, respectively, 16.9%, 43.6% and 51.3% in UASB7 reactor, 25.6%, 50.3% and 59.2% in UASB12 reactor and 30.6%, 61.2% and 71.9% in UASB7/SBR6 reactor. The energetic potential was found to be 4.66x10-4, 7.77x10-4 and 5.12x10-4 kWh/L for the UASB7, UASB12 and UASB7/SBR6 reactors, respectively. The pumping system, the aeration (in the anaerobic-aerobic system) and the temperature controlled heating system were considered to calculate the energetic consumption. However, the third one was not employed since tropical regions like Brazil do not need heating systems and also because of its high energetic consumption. The calculated net energy balance in the reactors was negative in the case of greywater, respectively -0.16, -0.28 and -0.18 kWh/L for the reactors UASB7, UASB12 and UASB7/SRB6. In full scale (ETE Jardim das Flores - Rio Claro, SP), the average energy... (Complete abstract click electronic access below)

Avaliação da auto-suficiência energética de reatores anaeróbios no tratamento de esgoto sanitário e de água preta

The purpose of this project is to verify whether anaerobic reactors applied to sewage treatment are energetically self-sufficient. This evaluation can be made by balancing the methane produced through the anaerobic transformation stages (hydrolysis, acidogenesis, acetogenesis and methanogenesis) and the reactor energy consumption requirements. The original project included methanogenic activity tests, which could not be performed due to setbacks in the installation of an analytical instrument. Scientific articles about bench- and full-scale anaerobic reactors were investigated instead. An average substrate-to-methane conversion efficiency of 58,2±18,6% was found for the bench-scale reactors and higher efficiencies (89,2%) were found for the cases which had higher Organic Loading Rates (OLRs) values. The average energy output was 0,013 kWh/Lsewage, value unable to meet the energy needs for the reactor operation, considering equipments normally used such as temperature controller. This balance can become positive if few hypotheses are made, for example (i) to eliminate the use of temperature controller (ii) to alter the operation pattern from continuous to intermittent. Based on energy balance assessment of eight bench-scale reactors, it was observed that the implementation of a system for biogas utilization is not energetically feasible. However, interesting results were found for a full-scale sewage treatment plant, ETE Ouro Verde – Foz do Iguaçu, PR, Brazil. Even though its substrate-tomethane conversion efficiency was about 10% only, the energy balance was quite positive, with energy consumption of 68 kWh/month and energy production of 660 kWh/month. This analysis leads us to conclude that energy recovery from full-scale sewage treatment plants should be practiced by other plants