Desempenho das etapas de tratamento de água, da estação de tratamento de água Poxim

Michelan, Denise Conceição Gois Santos; Batista, Isabela Ferreira; Batista, Daniela Ferreira; Mendonça, Luciana Coêlho; Lima, Daniel Moureira Fontes

doi:10.18226/23185279.v7iss3p7

Cited by 3 publications

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References 1 publication

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“…As mentioned before, the data variability between the collections was possibly due to the temporal variations of the raw water quality. Michelan et al (2019) [21] report that rainfall regime may influence the water quality, since the runoff may carry higher organic matter content to the river and consequently more sludge is generated in WTP process. Regarding color and turbidity, the Brazilian legislation does not address limits, however, the values obtained are largely above those presented by Souza and Almeida-Filho (2017) [18] that registered 165 to 3690 uH for the filter sludge and 3560 to 33000 uH for decanter sludge, and for turbidity the results were 285 to 445 uT (filter) and 410 to 2080 uT (decanter) and by Nóbrega et al (2011) [1] that registered 17 to 469 uH for the filter sludge and for turbidity the results were 4 to 297 uT (filter).…”

Section: Resultsmentioning

confidence: 99%

Potencial contribuição do lodo da estação de tratamento de água (ETA) para a poluição de rios

et al. 2021

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Esta pesquisa teve como objetivo caracterizar o lodo de uma Estação de Tratamento de Água (ETA) de uma cidade costeira e tropical do nordeste brasileiro. Os parâmetros físico-químicos (cor, pH, turbidez, sólidos totais e sedimentáveis, demanda química de oxigênio e alumínio total), análises microbiológicas (coliformes termotolerantes) e ecotoxicológicas (semente de alface - Lactuca sativa) e do microcrustáceo marinho (Mysidopsis juniae) foram analisados em amostras de lodo do decantador e da água de lavagem dos filtros. Como esperado, o lodo do decantador apresentou maior quantidade de sólidos do que o filtro, mas, apesar disso, a concentração total de sólidos no filtro ultrapassou 86 vezes o limite para ser despejado nos corpos hídricos, segundo as diretrizes brasileiras. Além disso, as concentrações de alumínio estavam acima das diretrizes para água doce (910% - lodo do decantador e 210% - lodo do filtro). Em relação à ecotoxicidade, o lodo de ambos os estágios não afetou a germinação das sementes e ainda promoveu o crescimento de 30 a 60% das radículas. Por outro lado, o lodo do decantador mostrou-se significativamente tóxico para microcrustáceos em concentrações acima de 15%. Considerando que esses lodos podem ser lançados diretamente no rio em zona estuarina, destaca-se seu potencial de toxicidade ao meio aquático e a importância do tratamento adequado antes de sua disposição final.

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Section: Resultsmentioning

confidence: 99%

Potencial contribuição do lodo da estação de tratamento de água (ETA) para a poluição de rios

et al. 2021

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Effects of the transfer of the São Francisco River waters on the performance of the water treatment plant of Gravatá, Paraíba, Brazil

et al. 2021

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The objective of this study was to evaluate the effects of the transfer of the São Francisco River waters on the quality of the water produced by water treatment plant of Gravatá (WTP-Gravatá) using multivariate statistics. Monthly means of the variables pH, apparent color and turbidity of raw, decanted and treated waters were used, in addition to the volume accumulated by the Epitácio Pessoa reservoir, during the period from January 2016 to December 2017. The arrival of the transposition waters abruptly changed the apparent color and turbidity of the raw water. In spite of that, the treated water presented low variability of the mentioned parameters, indicating that the WTP-Gravatá was able to adapt its treatment. From the factor analysis/principal component analysis (FA/PCA) it was found that changes in reservoir volume alter the apparent color and turbidity of the raw water, requiring interventions in the coagulation/flocculation/decantation stages. The increasing of these parameters in the decanted water overloads the filtration step, raising the apparent color of the treated water. The cluster analysis distinguished the different phases experienced by the Epitácio Pessoa reservoir. The information obtained can help decision making in WTPs, considering changes in reservoir volumes.

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Land Use and Water-Quality Joint Dynamics of the Córrego da Formiga, Brazilian Cerrado Headwaters

et al. 2022

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The Brazilian Cerrado biome provides relevant ecosystem services for Brazil and South America, being strategic for the planning and management of water resources as well as for agribusiness. The objective was to evaluate the water quality along the course of the Córrego da Formiga in a virgin portion of the Brazilian Cerrado, the relationship of land use with physical-chemical and biological parameters of the water, and the inflow of the tributary. Five water collection points were defined (between the source and mouth) and observed on a quarterly scale in 2015, water samples were collected and analyzed for physical-chemical and biological parameters in the laboratory, and flow measurements were performed at the same point and day of water collection. To identify and quantify land use and land cover (LULC) in the watershed, an image from the Landsat8-OLI satellite was obtained, and other geomorphological data from hypsometry (Topodata-INPE) were obtained to generate the slope, basin delimitation, and contribution area for each water collection point. The LULC percentages for each area of contribution to the water collection points were correlated with the physical-chemical and biological parameters of the water and submitted to multivariate analysis (PLS-DA) for analysis and grouping among the five analyzed points. Changes in water-quality patterns were more pronounced concerning the time when the first and last sampling was performed (rainy period) and may be influenced by the increase in the volume of water in these periods. The stream flow is highly variable over time and between points, with the lowest recorded flow being 0.1 L s−1 (P1) and the highest being 947.80 L s−1 (P5). Córrego da Formiga has class III water quality (CONAMA resolution 357), which characterizes small restrictions on the use of water for multiple uses. The soil cover with native vegetation is just over 12%, while the predominance was of the classes of sugar cane (62.42%) and pasture (19.33%). The PLS-DA analysis allowed separating the water analysis points between P1, P2, P3, and P5, while P4 was superimposed on others. It was also possible to verify that the parameters that weighed the most for this separation of water quality were pH, alkalinity_T, alkalinity_h, calcium, and hardness, all with a tendency to increase concentration from the source (P1) to the mouth (P5). As for water quality, it was also possible to verify that points P2 and P5 presented better water-quality conditions.

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Desempenho das etapas de tratamento de água, da estação de tratamento de água Poxim

Cited by 3 publications

References 1 publication

Potencial contribuição do lodo da estação de tratamento de água (ETA) para a poluição de rios

Potencial contribuição do lodo da estação de tratamento de água (ETA) para a poluição de rios

Effects of the transfer of the São Francisco River waters on the performance of the water treatment plant of Gravatá, Paraíba, Brazil

Land Use and Water-Quality Joint Dynamics of the Córrego da Formiga, Brazilian Cerrado Headwaters

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