Programa de Pós-Graduação em Engenharia Civil - PPGEC/ITEC
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2303
O Programa de Pós-Graduação em Engenharia Civil (PPGEC) do Instituto de Tecnologia (ITEC) da Universidade Federal do Pará (UFPA) foi aprovado pela CAPES em 1999 e teve sua primeira turma iniciada em 2001, sendo o primeiro Curso de Mestrado Engenharia Civil na Região Norte do Brasil, realizando atividades integradas de Ensino, Pesquisa e Extensão nas áreas de Engenharia Civil e Engenharia Sanitária e Ambiental.
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Navegando Programa de Pós-Graduação em Engenharia Civil - PPGEC/ITEC por Assunto "Açaí"
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Item Acesso aberto (Open Access) Estudo da viabilidade econômica para a utilização da semente da euterpe oleracea mart. (açaí) como recurso energético(Universidade Federal do Pará, 2008-07-09) LUCZYNSKI, Miroslawa; MACHADO, Luiza Carla Girard Teixeira; http://lattes.cnpq.br/9773700229115395This work had as objective the study of the economic viability for the Euterpe oleraceas Mart. (açaí) seed use as energy resource in the city of Belém-PA. Initially, it was realized a field survey of the sail points and quarters of biggest production of açaí, carrying through after that the assays of the termogravimetric properties of the seeds that are: Humidity text, volatile text, cinzas text, fixed carbon text and superior calorific power. The survey points made possible the creation of a data base, using the Microsoft Software Access, which supplies reports with the identification of the proprietors name, as well as the number of bags that is it processes per day, weight of bag and its energy potential. It was used still the Microsoft ARC VIEW, of easy interaction with Access that made possible the creation of an up to date map of the points for the city of Belém-PA. With those data a study of the transport routes was made in the Geographic Information System (GIS) GOOGLE EARTH. There were determined routes, through the Centroid method, which is the point of highest concentration of the variable of study, in this case, the açaís seed, for the transport of biomass to its final destination that is the UFPA, where if it finds the plant that uses the biomass as combustible to generate energy. When calculating the economic viability there were used the plant of Energy and Biomass of the Group of Energy, Biomass and Environment (EBMAs) together with the data of the consumption of electric energy of the UFPA in the period from 06/2006 to 06/2007, finally it was realized a comparison between the values gotten in the two done surveys and the confirmation of how much the UFPA would save in financial and energy terms with the biomass energy use. In conclusion the açaís seed is economically viable as energy resource for energy supply in UFPA, since the cost of supplied electric energy the concessionaire services the CELPA must exceed the cost of the renewable generation system, thus causing an economy in the final value, of the consumption of electric energy.Item Acesso aberto (Open Access) Utilização do caroço de açaí como leito filtrante no tratamento de água de abastecimento e residuária(Universidade Federal do Pará, 2014-06-04) COSTA, Letícia dos Santos; ALVES, Rui Guilherme Cavaleiro de Macedo; http://lattes.cnpq.br/1902384822911246This research was to assess the implementation of the waste generated by pulping açaí for the production of an alternative coal for use as a filter bed in the treatment of water supply and wastewater process, giving added value and proper waste disposal. The study was conducted in 4 steps, first was done collecting and preparing the stones for further characterization of alternative coal, filter assembly and verification of water quality and sewage treatment. The experimental pilot system was composed of two columns of PVC pipe with a diameter of 100 mm, with alternate filter bed, one for the treatment water supply and the other for post-treatment of sewage, both with 1.0 m time. Was used only a single layer of the filter bed 30 cm in each alternate carbon filter which was fed with 5.0 L of raw water (AB), the input obtained from the Water Treatment Plant and 5.0 L treated sewage (ET) obtained at the output of the Vila da Barca sewage Treatment Plant. The physico-chemical analysis of water and sewage filtered by alternate coal were taken every 24 hours and 48 hours, observing the times of contact that showed better adsorption of the particles. Monitoring of filters with filter bed of lump calcined acai performed well, especially in the case of Suspended Solids retention with 23% efficiency in removing color with efficiency of 51% and Turbidity with efficiency 32% for water. Sewage treatment showed the alternate filter removal efficiency of 72% for ammonia nitrogen, 55% efficiency in removing organic matter represented by the COD and 48% removal efficiency of suspended solids. The review by hypothesis tests applied to assess the equivalence between the mean values of representative pairs of variables (24h and 48h) of physico-chemical parameters studied in alternative filtration for water and sewage showed equivalence between pairs of pH, Turbidity, hardness (mg-CaCO3 / L) hardness (mg- MgCO3 / L), TS and SS (relative to water filtration); Total phosphorus, ST, SD and SF (referring filtration of sewage). It was possible to state that there was considerable variation in the average of these variables between the contact times (24h and 48h) values. Also, it was possible to state that the contact time of 48 hours caused greater reductions in the concentrations of variables, Color (for water); Ammonia-N, COD and SS (sewage). The contact time of 48 hours was the most efficient alternative to filtration have gotten promote significant reductions in some variables.Item Acesso aberto (Open Access) Verificação da tratabilidade de água residuária oriunda de beneficiamento do açaí por processo físico-químico(Universidade Federal do Pará, 2016-04-15) FEIO, Vanessa Farias; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593This work aims to study the wastewater treatability coming from açaí processing plant, trougth jar test assay to get the best conditions for the physical-chemical wastewater treatment. For this, two experimental steps was done:1) Quantitative and qualitative characterization of raw wastewater to elaborate flow hydrograph and hydric balance. 2) Assay coagulation/flocculation/oxidation on jar test using hydrated lime, tannin, sodium hypochlorite, polyaluminium cloride and polymer. In treatability test dosage was varied for each product and analyzed in the clarified effluent variables: pH, apparent color, turbidity and COD. It was also determined the treated effluent quality index and the qualitative characterization of effluent of the proposed treatment, beyond the physical characterization of the sludge. Furthermore, it was estimated monthly cost of chemicals products for proposed treatment. By the results for wastewater quantitative characterization were obtained flow of Qméd = 305 L/h; Qmax = 521 L/h and Qmin = 183 L/h and qesp. of 0.51 L/kg.d. To the water balance was found that weight of water used is 112.4 ton/d, generating 7.30 ton/d of wastewater, water in the pulp mass equal to 49.36 ton/d and water loss of 55.81 ton/d. For treatability tests the best result was obtained for the combination polyaluminium (18mg/L) and polymer (30 mg/l) at pH 8.0, resulting in apparent color removal 98.5%; 99.8% of turbidity and COD equal to 90% . In the physical characterization of sludge was found values: density of 1.002 and specific mass equal to 1001.8 kg/m³, moisture content of 98.9%, and the SV/ST equal to 73%. In the cost estimate with chemical products was obtained R$4,77/month, representing R$0,022/m³ of treated effluent. We conclude that this effluent treatment is viable for physical-chemical treatment process.