Tratamento da mastite subclínica de ovelhas no período seco com antimicrobiano convencional e antimicrobiano nanoparticulado

Pós-graduação em Medicina Veterinária - FCAV

Incorporação do lodo da estação de tratamento de água (ETA II) do município de Rio Claro-SP, na argila, para produção de cerâmica vermelha

The slugde from decanters in Water Treatment Plants (WTP) has different composition varying, according to the region, coagulant type and dosages, the plant layout. In this work, the physical characterization of the sludge generated from decenties (ETAII the municipality of Rio Claro, Brazil), the manufacture of bodies of evidence-sludge mixture of clay (with humidity of 8% and concentrations of sludge, 5, 15 and 30%) the testing technology after burning the mixture to a temperature of 950 ° C were investigated. The main aim assess the possibility of its use as raw material in the ceramic red production. For comparison of the obtained results it was used values of the testing technology of bodies of evidence only with clay, prepared under the same conditions. In general, the addition of sludge from ETA made worse the properties of the ceramic body, however, the values obtained from the tests on the concentration of 5% of sludge, still remain within the acceptable limits for the production of red pottery pieces.

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)

Investigação do tratamento de água de máquina de lavar roupa empregando reator biológico, em escala piloto, visando redução da concentração de fósforo para reúso não potável

This research aims at the study of treatment of clothes washing water through biological treatment, for the purpose of evaluating the reduction of phosphorus to make it suitable for a posterior treatment of physical-chemical. For this purpose it was employed a sequencing batch reactor, consisting of aerobic and anaerobic phases. During the project it was verified not only the reduction of phosphorus (removal of 30 to 50%) but also the reduction of BOD, COD, Turbidity and Nitrate (removal of 38 to 36%, 34 to 41%, 72,3 to 75% and 57,8 to 60% respectively), which demonstrates that the proposed treatment can assist advanced treatments of water for its non potable reuse

Tratamento de água pluvial para fins não potáveis com utilização de amido de milho como coagulante em filtração cíclica em escala de laboratório

The aim of the present work is to investigate a simplified rainwater treatment strategy for nonpotable use. For this, there were simulated in laboratory scale the treatment conditions of a system that employs Corn Starch as a coagulant in cyclic filtration (from 1 to 5 filtration cycles). A commercial Corn Starch in different dosages was used (0,1; 0,2; 0,4; 0,6; 0,8; 1,0; 1,5; 2,0; 2,5; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0; 6,5; 7,0; 7,5; 8,0; 8,5 e 9,0 mg/L). The NBR 15527/07 recommended parameters were monitored on the inflow and outflow and compared to different first flushes (0.5; 1.0 and 1.5mm). The obtained results indicate that the 6.0mg/L dosage presented the best results (removal efficiency of 86% of turbidity; 88% of apparent color and absent of total and faecal coliform residuals). However, it was not possible to prove the filtration cycles benefit, in laboratory scale, because for some Corn Starch dosages the water did not present better quality when increasing the number of cycles.

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

Uso de cascas de laranja como adsorvente de contaminantes no tratamento de água

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação do efeito da paralisação da aeração no tratamento biológico aeróbio da água residuária da indústria de farinha de mandioca

The cassava wastewater, generated during the cassava processing, is a pollutant and toxic waste. This study compared the efficiency of the cassava wastewater treatment in three batch aerobic systems with a ru1nning time of 24 hours, and aeration stoppage of 12h with 2,500, 6,000 and 10,000 mg COD L-1 . The systems were evaluated for COD, pH, SVI and F/M. The results showed that the reactor with aeration stoppage for 12 hours, with 2,500 mg COD L-1 , presented the best reduction in a process with considerable energy consumption saving compared to traditional continuous systems.

Análise comparativa dos métodos MQL, MQL/Água e convencional na retificação cilíndrica do aço ABNT 52100, com rebolo de óxido de alumínio

Pós-graduação em Engenharia Mecânica - FEB

Utilização de resíduos de tratamento de esgoto como suprimento hídrico e nutricional na cultura do girassol

Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA

Aplicação de efluente de tratamento de esgoto, via aspersão, no solo e em Brachiaria

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Avaliação do desempenho de uma unidade em escala real para tratamento de água pluvial empregando a filtração direta por meio de filtro de pressão e amido natural de milho como coagulante primário

The aim of this study was to investigate the performance of an experimental rainwater treatment system for non-potable uses. Without the first-flush discharge it was expected to control the quality of captured rainwater and to minimize the rainwater by-pass caused by the first-flush strategy. A full-scale direct filtration unit was operated and a solution of natural corn starch was used as the primary coagulant. The color, turbidity e coliform efficiencies of the unit was analyzed based on filtration loads and the net water production was estimated. The results pointed out turbidity removal up to 70.8% and color removal up to 61.0%. The backwash of the filtering system was completed in 3 minutes at the rate of 1,440 m3/m2day with consumption of treated water from 0.5% to 2.2%, based on the potentially harvesting.

Análise do perfil de dureza e microestrutura de um aço forjado AISI A2 submetido a tratamento térmico com resfriamento em água

Due to the large use of steel in several processes around the world, there is the increasingly concern to find new materials and/or optimization and improvement of the processes, as the need to reduce the cost and a productivity increase in the primary industry, such as the siderurgy. The rolling is the most used mechanical process in the world and therefore is required the development of new tools in high volume and with optimum characteristics to support the market demand. Forged rolls used are for rolling. These rolls have heat treatment that has the purpose to achieve the appropriated mechanical properties to support the variables of the rolling process. The objective of this work is to analyze the hardness profile and the microstructure a tool steel similar to AISI A2, forged in an opened die process and submitted to heat treatment with water-cooling. The results allowed plotting a hardness profile and performing a microstructure analysis, and whereby to confirm that the heat treatment is not a quenching, but it is a material beneficiation by the hardening of superficial layer, since there is no martensitic microstructure. Therefore, this paper provides the support to future studies about the possibility to perform enhancements in this thermal heat made in the rolls produced at Gerdau Plant in Pindamonhangaba

Testosterona e gonadotrofina coriônica humana estimulam a esteroidogênese em células da granulosa de folículo pré-ovulatório de égua?

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)