Programa de Pós-Graduação em Engenharia Sanitária e Ambiental (Mestrado Profissional) - PPGESA/ITEC

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/16530

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Agora exibindo 1 - 3 de 3

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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)
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.

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