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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Acesso aberto (Open Access)
Avaliação de cargas poluidoras de nutrientes em canais urbanos de macrodrenagem no município de Belém/PA
(Universidade Federal do Pará, 2023-02-28) BORGES, Erika Joana Nabiça; COELHO, André Luiz da Silva Salgado; http://lattes.cnpq.br/0853586340257273
With the expansion and population growth of the municipality of Belém/PA, areas with little or almost no sanitation infrastructure were developed, since as it grew, it circumvented water accidents instead of sanitizing them, resulting in large investments in works of macrodrainage currently, in peripheral areas. This work sought to evaluate the degree of pollution caused by polluting loads of nutrients in the 03 (three) macrodrainage channels, being Quintino Bocaiúva, Timbiras and Caripunas, belonging to BHEN, whose contribution flows into the main source of public supply in the municipality. For this, the work carried out the calculation of polluting loads of nutrients, analyzing NTK, ammoniacal-N, organic-N, Nitrate (NO3) and Total Phosphorus, in 5 qualitative campaigns, in addition to having carried out a bathymetric survey in 3 campaigns, considering the rainy and less rainy period. Initially, the flow results were presented, which after simulation it was verified that the highest flow is related to the Quintino channel, which was to be expected due to its greater contribution area. The correlation between nutrients and physical variables of temperature, OD and pH of the water was also verified. Thus, it was found that despite being small in most cases, there is a correlation between those mentioned. In addition, the concentration of the parameters was analyzed separately, based on the results of the laboratory analysis, in which the forms of nitrogen and phosphorus exceeded the limits recommended in the legislation, also expected due to the high contribution of the subbasins, in addition to there being no treatment efficient domestic sewage system in this area. Finally, the polluting load values were analyzed based on the relationship between flow and concentration, resulting in high values of load released into the receiving body, characterizing a scenario of extreme water degradation. Still, with this relationship it was possible to estimate the population that would be contributing to this scenario, whose numerical values were also quite high and not consistent with the reality in the area. Therefore, through these results, it is possible to affirm that they may be harmful to the waters of the canals, where a significant degradation of the quality of the waters is expected, which will follow to the Guamá river, and consequently, will reach the population that directly or indirectly have contact with these bodies of water
Acesso aberto (Open Access)
Monitoramento da qualidade da água de consumo humano em Belém-PA/: uso de dashboards visando aprimorar a gestão municipal
(Universidade Federal do Pará, 2024-06-27) NASCIMENTO JÚNIOR, Lourival Maurício; COELHO, André Luiz da Silva Salgado; http://lattes.cnpq.br/0853586340257273
The present study aims to monitor water for human consumption in the Municipality of Belém/PA through dashboards, which are visual panels where relevant information is condensed and presented to facilitate data analysis. The idea of the work is to develop a strategic tool for monitoring the quality of water for human consumption for the Municipality of Belém/PA that is dynamic and interactive, considering data from the Water Quality Surveillance Information System (SISAGUA). The methodology used consisted of 3 distinct stages. In stage 1, monitoring data were extracted from the SISAGUA system, referring to the variables residual free chlorine, turbidity, total coliforms and Escherichia Coli, registered between the years 2018 and 2023. In stage 2, with the data extracted in Excel spreadsheet format, The physical-chemical index (IFQ) for turbidity and free residual chlorine was determined, with the aim of evaluating whether the water meets the maximum permitted values. For the variables Total Coliforms and Escherichia Coli, whose laboratory results are presence or absence, the bacteriological index (BI) was calculated to assess whether the water meets the bacteriological standard for potability. In stage 3, dashboards were created to assist in monitoring water for human consumption, using the Microsoft Excel program, through which it is possible to observe and make comparisons with current potability criteria. For the water supply system (SAA), 3,518 samples were extracted, and for collective alternative solutions (SAC), 785 samples were extracted. The designation of these forms of supply as SAA or SAC is the responsibility of Environmental Surveillance when entering the data into SISAGUA, according to the criteria established in the potability ordinance. The results at the station outlet showed that the IFQ for free residual chlorine ranged from 34.02% to 66.67%, while in the distribution network it ranged from 18.40% to 35.60%, both below the ideal IFQ of 100%. The results at the station outlet showed that the IFQ for turbidity ranged from 82.86% to 100%, while in the distribution network it ranged from 92.96% to 95.06%. The results at the station exit showed that the BI for Escherichia coli ranged from 86.05% to 96.67%, while in the distribution network it ranged from 86.10% to 90.54%, values below the ideal BI of 100%. There were worrying non conformities in relation to residual free chlorine and Escherichia coli, as these are important indicators of the sanitary quality of the water. This demonstrates the advantage of using a dashboard compared to traditional reports. The use of this tool by the Health and Environmental Surveillance of the Municipality of Belém/PA can positively contribute as an instrument to support municipal management, facilitating decision-making and monitoring water for human consumption.

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