Navegando por CNPq "CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIAS"

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Acesso aberto (Open Access)
Avaliação comparativa entre a estimativa do impacto gerado por efluentes domésticos de assentamentos espontâneos e de ocupação formal na bacia do Tucunduba em Belém - Pará
(Universidade Federal do Pará, 2008-04-18) MEIRA, Rose Caldas de Souza; CARDOSO, Ana Cláudia Duarte; http://lattes.cnpq.br/3138101153535395
The aim of this research is to present a comparative evaluation of environmental damage produced by different housing contexts whithin the same urban space, in a district of Belém municipality, called Guamá, one represents a formal context José Bonifácio Av., and other represents the informally produced space Riacho Doce community. This evaluation has taken into account the following features, namely: per capita consumption of water, per capita consumption of sewage, universality and equality of the provision of sanitation services (water supply, sewage), charging for water supply, quality and accessibility of services, housing context, socio-environmental features, in order to characterize the population living in those referred areas and finally to estimate the organic charge (Tonne / day) and the flux of effluents generated in spontaneous settlements and in a consolidated urban area, with the aim of identifying which housing context presents greater potential for impact in terms of flow generation and organic charge on effluents receiving basin, in this case the Tucunduba basin. Although the results are relatively close values, in the area of the Riacho Doce the flux of sewage is estimated as 44,38 m3/ day and organic charge is estimated as 13,31 Kg of DBO/day, whereas in the area of the José Bonifácio the flux of sewage is estimated as 43,06 m3/day and organic charge is estimated as Kg of DBO /day. It was possible to verify from results, that there are differences between the environmental impacts yield by the two areas above referred on the receiving basin of river Tucunduba, being that the environmental impact generated by Riacho Doce, where the population remains in contact with the effluent and under a greater sanitary vulnerability, since that effluents of Jose Bonifacio Av. are guided by drainage system and its organic charge is diluted by flux of rainwater to reach Tucunduba River (removing the contamination of its source) while the effluents from Riacho Doce are launched in natura directely below houses and in Tucunduba River.
Acesso aberto (Open Access)
Diagnóstico de um sistema público de abastecimento de água segundo o usuário: estudo de caso do Conjunto Residencial Beija-Flor – Marituba - PA
(Universidade Federal do Pará, 2012-03-30) TAVARES, Antônio de Noronha; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973; FERNANDES, Lindemberg Lima; http://lattes.cnpq.br/4641468846318922
Evaluates in the perspective of the user, the system's water supply Companhia de Saneamento Do Pará, in operation at residential Beija-Flor, in Marituba, city of Pará. The study of the information gathering stages of the supply system was divided into: field research and data processing, evaluating on the socioeconomic dimension of consumer impressions of the utility services, forms of use, and evaluation of economic sense inter-relationships and others. States that the residential Beija-Flor was built for one families only. Demonstrates analysis of factors related to waste and water leaks, which there are considerable chances of residential water meters are defective.states that the service provided by COSANPA is poor, according to the insatisfaction of local residents quality. Analyzes the price of the water, offered by COSANPA, to be expensive. Was found a great chance of environmental contamination in the groundwater, soil, and infectation through water diseases in the occurrence of water shortage in the distribution network. Estimates that among the problems in the management of the Companhia de Saneamento do Pará, is about the company's poor communication with its users and in the management of the supply system, biggest problem detected, and also to the rare occurrence of water shortages and the fact that there significant rate metering. Notes that "hear" the user is an important tool to help improve the management of water supply services.
Acesso aberto (Open Access)
Estudo comparativo entre reatores UASB e tanque séptico, em escala unifamiliar, no tratamento de esgoto de comunidade quilombola amazônica
(Universidade Federal do Pará, 2012-08-28) FREITAS, Elenilce Monteiro de; COELHO, André Luiz da Silva Salgado; http://lattes.cnpq.br/0853586340257273
This research presents a comparative study of reactors upflow anaerobic sludge blanket (UASB) and septic tank (ST) in order to investigate the use of these reactors scale single-family home in sewage treatment. The research was conducted in quilombola community near the city of Belém-PA. For this, were used eight UASB reactors (in the form of “Y”) and a septic tank prismatic single camera. The UASB reactors had volume of 0,42 m3, while the septic tank volume of 4,20 m3. Each reactor was installed in a home, with powered exclusively by sewage black (water, feces and urine) come from the toilets of the bathrooms. Was analyzed the technical feasibility of the use of the first replacement in the second, with a view that the ST is widely used in places of Brazil devoid of sewage collecting system. The operations were carried out simultaneously for approximately 90 weeks, being monitored parameters that allowed the analysis of operating stability and performance of each reactor. At the end of the research was observed that the UASB reactors showed performance as satisfactory as or better than that of the ST in the treatment of organic matter and suspended solids. Therefore, was demonstrated the feasibility of application of the UASB reactor used in the treatment of sewage from single-family small rural communities.
Acesso aberto (Open Access)
Estudo da viabilidade econômica com o aproveitamento de água de chuva numa metrópole da Amazônia
(Universidade Federal do Pará, 2016-07-11) CORREA, Roberto dos Santos; FERNANDES, Lindemberg Lima; http://lattes.cnpq.br/4641468846318922
The study evaluated the potential of rainwater utilization in Belém-PA, with emphasis on the economic viability of the residential consumer perception and the reflection in spending on the production of drinking water by the supply utility. In quantifying the utilization system was used the method of Ghisi et al. (2006). Was using a precipitation temporality series in the 30-year period (1984-2013), the database of the National Institute of Meteorology (INMET). The historical series of precipitation indicated that Belém has two defined periods in the year, a rainy December to May, and another less rainy June to November, the fact that Belém does not display completely dry periods. For the analysis of economic viability in the view of the residential customer was prepared two scenarios, with and without the deployment costs of utilization system. Obtaining the first scenery unfeasible, and the second economically viable. In the perspective of supply concessionaire, the use is economically viable.
Acesso aberto (Open Access)
Estudo de viabilidade econômica da implantação de leito de secagem para tratamento de efluentes sanitários gerados em uma mineradora no estado do Pará
(Universidade Federal do Pará, 2022-12-28) FERREIRA, Cleyton Eduardo Costa; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593
Waste management is one of the main challenges of modern society, especially when it comes to finding more sustainable and economical alternatives for the treatment and disposal of these materials. In this context, biosolids, a byproduct generated from wastewater treatment, have been identified as a possible source of nutrients and organic matter for agriculture and other sectors, thus contributing to a more circular economy. Biosolids contain a large amount of nutrients that can be used to improve soil quality and increase agricultural productivity (OLIVEIRA et al., 2018). In addition, the use of biosolids as fertilizer can reduce the need for chemical inputs, contributing to the reduction of the environmental impact associated with final disposal (RIBEIRO et al., 2015). This study was conducted in a mining company in the state of Pará, Brazil, which has eight decentralized anaerobic wastewater treatment plants. The study aimed to define the treatment route for biosolids, as well as to evaluate the economic viability of implementing a drying bed for the production of biosolids to be applied in the restoration of degraded areas. It was found that 11,776 kg of total suspended solids (TSS) per year of sludge are generated, resulting in the design of a drying bed with three cells, each with 22 m², an operation cycle of 25 days, and a Surface Application Rate of 13.30 Kg TSS/m²xdia. For sanitization, CaO was chosen. The implementation cost of the drying bed was R$ 100,358.70, operational costs were R$ 2,059.62/month, and the solution via incineration was R$ 18,415.80/month. Based on the simple and discounted payback, the investment returns in approximately 7.14 and 7.19 months, respectively, and is part of the synergistic costs with the current sanitation management. The other indicators point to the investment as viable and capable of financial surplus. Therefore, the company will have financial and environmental gains with the implementation of the project.
Acesso aberto (Open Access)
Importância da frequência de descarte de lodo na eficiência dos decantadores de estações de tratamento de água em ciclo completo
(Universidade Federal do Pará, 2004-10-20) CUNHA, Márcia Valéria Porto de Oliveira; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
In this work, different periods of discharge of the sludge stored in the decanters of the ETA Bolonha had been evaluated, with the purpose to recommend the operational routine that presents the best ones results in the efficiency of the decanters. The three experimental phases had been divided in three stages: being in phase 1 evaluated the efficiency of the current operation routine of the decanters what is the total discharge of sludge in 12 in 12 days. In phase 2, the operational routine was modified to a daily discharge during the time of 5 minutes and so it coud take care of the recommendations of the executive project; by the other hand, in phase 3, the operational routine was modified again, discharge of sludge of 5 in 5 days during the time of 5 minutes, in order to getting better results of efficiency. In these three phases it was realized the control of total suspended solids, dimming and color in the effluent tributary and, as well as quantified and characterized the sludge generated in the decanters. With the research it was possible to observe that according to the point of view of efficiency of the decanters, the implemented operational routine in phase 3 (discherge of sludge to each 5 days) it was showed more adequate. By the way, it recommends that tests with other operational routines should be done in order to remove the sludge deposited in the decanters to diminish the losses of water of this operation. Moreover, it is important to study other ways to remove the deposited sludge in the intermediate tray of the decanter to prevent the accumulation of sludge on tray.
Acesso aberto (Open Access)
Influência do leito de contato na eficiência de remoção de ferro de águas subterrâneas
(Universidade Federal do Pará, 2006-12-27) LIMA, Rosete Ferreira de; MACHADO, Luiza Carla Girard Teixeira; http://lattes.cnpq.br/9773700229115395
The present work consisted on the evaluation of the acting of a Pilot Iron Removal Plant (IRP), regarding the presence or absence of contacting surface. The Pilot IRP is composed by an multiple tray aerator, a contact surface by ascending flow and a downflow rapid sand filter, sited at Federal University of Pará, using raw water from underground water deposits, containing high quantity of Iron, around 2mg/L, above the 0.3mg/L established on the 518/2004 law. During the monitoring two experimental phases were made, the first with the contact surface and the second without it, being adopted three filtration rates: 180m/mxday, 270m/mxday and 360m/mxday. In the experimental phases were appraised the following variables: pH, Color, Total Iron, Ferrous Iron and the turbidity. The efficiency of removal of total iron obtained for the rates of filtration of 180m/mxday, 270m/mxday and 360m/mxday with the contact surface was 93% to 94%, 85 % to 95% and 91% to 92%, respectively. Without the contact surface the efficiency of extracting of iron was around 91% to 93%, 91% to 93% and 88% to 93%, respectively. The filtration duration with contact surface for the rates of 180m/mxday, 270m/ mxday and 360m/mxday presented duration of 41h, 30h and 22,7h, respectively, while with the absence of contact surface the medium duration was of 16h, 12h and 4,7h respectively. In that way it can be concluded that the contact surface is an indispensable unit in a IRP, because it improves the system acting, producing effluent of good quality effluent and langers filtrat ons.
Acesso aberto (Open Access)
Infra-estrutura de esgoto sanitário no município de Belém: cobrança por serviços de esgotamento sanitário nas bacias hidrográficas do Reduto e do Una
(Universidade Federal do Pará, 2006-04-28) LIMA, Mara Líbia Viana de; LIMA, José Júlio Ferreira; http://lattes.cnpq.br/5176390429456548
The payment for sewerage services in Brazil is generally assessed in terms of tarifs which are calculated over a proportion of water consumption, and employed to improve operation and maintenance services of collection and sewerage treatment, as well as a source of funds for the provision of that important infrastructure provision. The percentage of that proportion varies from company to company depending on the sewerage volume gerated after the water consumption is measured. Such criteria on the payment has been indirectly related over the degree of use done by each user, according with a percentage of water comsumption, which should correspond to the real contribution of sewerage to collecting networks. On the other hand, there is not a clear understanding of which factors interfere on the sewerge charging and how such factors can interfere on the assessment of charges for the use of sewerage, what brought into question its legitimacy, since not all water that was used returns to the environment as sewerage. The study on this dissertation aims at identifing which factors and how can interfere on the seewrage charging. In the study urban, technical and environmental indicators are used to analyse the reality of urban districts located on the urban basins of Reduto and Una in Belém, state of Pará in Brazil. For analysing those factors, data from the charging structure from the state company, related with the sewerage services, were associtated with urbanistic indicators adopted in the urban planning in Belem. The results sustain the role of influence of factors indentified in the study in the form of charging for sewerage , which are related with the contribution of sewerage, related with the contribution of the system for the treatment of water and charging for water consumption and not sustaining in terms of land use and intensity of occupation.
Acesso aberto (Open Access)
Investigação da condição trófica do reservatório de abastecimento de água Bolonha
(Universidade Federal do Pará, 2018-07-04) OLIVEIRA, Izabelle Ferreira de; TEIXEIRA, Luiza Carla Girard Mendes; http://lattes.cnpq.br/9773700229115395
This study focused on the monitoring of water in the Bolonha reservoir, with a focus on obtaining the Trophic State Index (IET) during the rainy and less rainy period of the year 2016. The site is located on the grounds of the Utinga State Park (PEUT), which is located at Avenida João Paulo II, s / n - Curió Utinga, in the municipality of Belém-PA. The reservoir has an elongated shape, approximately 577,127 m² of the area and 1,954,000 cubic meters of water volume; its maximum depth is around 7.64 m. The objective of this research was to evaluate the IET of the Bolonha reservoir from the quantification of the total phosphorus and transparency variables and the application of descriptive, analytical and multivariate statistics, and it was possible to observe the distinct variations in the analysis periods. The methodology of the work consisted in the accomplishment of composite and straightforward field collections, to a point, located at the entrance of the ETA Bolonha capture, before the grating. When a seasonal comparison between less rainy and rainier periods was carried out, using the Mann Whitney hypothesis tests, it was possible to observe that pH, alkalinity, accurate color, total phosphorus and dissolved oxygen did not show a significant difference between the analyzed periods. The other variables as visible color, total suspended solids, turbidity, and IET, presented substantial differences between rainier and less rainy periods. The presence of phosphorus is evident in both periods. The Mann Whitney test revealed that there was a significant difference of the phosphorus fractions between wetter and less rainy periods, through the ρ values. The test showed that the phosphorus fractions analyzed presented significant differences (p <0.05) lower than the significance level of 5%. Through the analysis of the main component for phosphorus fractionation, it was possible to observe the formation of two distinct elements for each period (rainy and less rainy), which together explained 93% and 92.6% of the variability of the data. The IET was calculated for Bolonha, which allowed to classify the Bolonha reservoir as a eutrophic environment, both in the rainy season and in the less wet period.
Acesso aberto (Open Access)
Modelagem de Informação da Construção (BIM) para Proposição de Alternativas de Tratamento de lixiviado
(Universidade Federal do Pará, 2025-03-19) SILVA, Rafael Haruo Yoshida; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593
The treatment of municipal solid waste leachate involves significant technical complexity due to its highly diverse composition, which is concentrated in organic, inorganic, and emerging contaminants, demanding a high level of engineering design. In this context, the use of facilitating tools such as Building Information Modelling (BIM) in the conception, execution, and management phases of these projects becomes essential for optimizing the time and resources required for each related stage. This is supported by Decree-Law No. 10,306 of April 2, 2020, and Law No. 14,133 of April 1, 2021. Given the need for adapting engineering projects to BIM and the environmentally adequate management of leachate generated in sanitary landfills, this dissertation aims to apply the BIM concept in the development of leachate treatment alternatives, exploring two treatment arrangements: alternative 01 for the low-load scenario and alternative 02 for the high-load scenario. The results obtained from the application of BIM in the design of the two leachate treatment alternatives were: (I) quantities of pipes, connections, hydraulic equipment, and treatment units; (II) verification of the number of inconsistencies in the two models; and (III) graphical pieces and images of the models. The quantity of alternative 02 exceeded alternative 01 by 100% in most of the items analyzed, except for the pipes, due to the complexity of alternative 02 and the scenario it pertains to (high load), thus requiring a greater allocation of resources. Regarding the inconsistencies observed in both models, a total of 64 inconsistencies between pipes, connections, and special valves were identified and corrected. As a result of the modeling, 70 graphical pieces, 10 quantity tables, and 8 rendered 3D images were generated. Regarding the evaluation of the leachate treatment alternatives 01 and 02 through the Simple Additive Weighting (SAW) method, indices of 0,94 and 0,74 was obtained, respectively. These values highlight the difference between the two scenarios (high load and low load) and the need for greater infrastructure and more significant resources in the expansion of the leachate treatment plant for alternative 02. By comparing the treated effluent discharge standards from CONAMA 430/2011 with international standards for treated leachate discharge, it was observed that Japan, Australia, France and United States of America were the countries most similar to Brazil, presenting similar regulated parameter values of 52.63%, 42.11%, 42.11% and 42.11 respectively. However, many of these parameters have different maximum allowable values when compared to those in Brazil, emphasizing the need for the requalification of current regulations and resolutions. Considering all the results obtained in this dissertation, the application of BIM in engineering projects proves to be a promising approach for optimizing time and resources in the conception, execution, and management of projects, although still in early stages in Brazil.
Acesso aberto (Open Access)
Plataforma de monitoramento da qualidade das águas residuárias no município de Belém/PA
(Universidade Federal do Pará, 2023-08-14) SARAIVA, Danielle Pinto; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593
Large cities, such as Belém in Pará, require effective control for the monitoring of wastewater, as it can compromise the quality of urban water. A significant portion of these wastewaters is discharged into surface water bodies and could potentially be reused by riverside communities. In this context, utilizing the principles of Industry 4.0 to promote sustainability, cost reduction, and social responsibility, this study aimed to develop the E-Quality platform. This platform serves as a tool for controlling analytical results according to predefined parameters, with the purpose of enhancing environmental monitoring. The digital platform collects existing data, filters and generates graphs for optimized evaluation, examines temporal series, and produces reports on pollutant loads. These reports include data, graphs, and text editing for presentation in printed documents. The study employed sampling data from the year 2015 collected at the Vila da Barca Treatment Plant, provided by UFPA - Federal University of the State of Pará. This real data was used to assess the platform's application, analytically verifying its results for efficiency in removal by the treatment plant, emission values of pollutant loads per ton discharged into the receiving water body throughout the year, and comparisons between Total Nitrogen and Ammonia, BOD and COD, BOD and Phosphorus. Following the evaluation of the stored historical data, the platform's quality filter was utilized. This feature identifies results that deviate from the CONAMA 430 standard and those that do not meet requirements, such as sample storage time or values that exceed predefined limits, as seen in the case of Total Nitrogen and Ammonia data input. From the existing results, it was evident that the platform facilitates data monitoring, control, and management, thereby reducing costs and enhancing data security. As everything generated and added to the platform is stored in the cloud, it provides control over gross errors that could originate from users or collection and analysis procedures. The realtime evaluation of all results, as exemplified by the analysis of data from the Vila da Barca Treatment Plant in Belém, demonstrates the platform's effectiveness in wastewater monitoring.
Acesso aberto (Open Access)
Proposta de gerenciamento operacional para a Estação de Tratamento de Esgoto: estudo da ETE Sideral, Belém-PA
(Universidade Federal do Pará, 2005) BARBOSA, Ana Julia Soares; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
In the present work, operational management of the Sideral Sewer Treatment Station is proposed - Belém City, Pará State. For that, was used a management method named management of the routine that aims to manage a main process by means of the flowcharts definition where certain activities and control items organize the process. In the work are analyzed: the physical conditions of the units and its influences in the proposed treatment; the current management way of SSTS, to finally elaborate the operational management proposal. The proposal has defined the main process, the sewer treatment, its subprocesses, the preliminary and secondary treatments, for which were defined operational activities as cleaning up the units, laboratorial and operational monitorship and control items as spreadsheet of data. It was also proposed the elaboration of a system to control data and informations for SSTS, as well as the management decisions and operations routine for SSTS.
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/1902384822911246
This 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.