Análise da eficiência da mucilagem da semente de chia como coagulante orgânico no tratamento de água para abastecimento
The purpose of this paper was the use of chia seed as an alternative organic coagulant in the treatment of water for supply. The coagulation, flocculation and sedimentation steps were simulated with the Jar Test equipment, while for the filtration step used 8μm filter paper was used in the base, the...
| Autor principal: | Botelho, Ingrid Cardozo |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2021
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/25713 |
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| Resumo: |
The purpose of this paper was the use of chia seed as an alternative organic coagulant in the treatment of water for supply. The coagulation, flocculation and sedimentation steps were simulated with the Jar Test equipment, while for the filtration step used 8μm filter paper was used in the base, then 1 cm of cotton and finally 2 cm of granulated activated coal 6-10 mm with the rapid filtration columns produced for this study. The water samples used were collected from Igapó II Lake, located in the city of Londrina - PR. Two chia coagulant solutions were prepared (S1 and S2), and two treatments were used only coagulation (C) and coagulation followed by filtration (CF) to compare the efficiencies and compare with the maximum values allowed by the Consolidation Ordinance No. 5 Annex XX of September 2017, Ministry of Health. The analyzed parameters were removal of turbidity and the behavior of pH, total dissolved solids, electrical conductivity and the presence of metals Na, K, Li and Ca. For both solutions, the chosen concentrations were 30 g.L-1, 35 g.L-1 and 40 g.L-1. The tests with Jar Test were performed using the methodology proposed by Botelho (2019). The values for maximum removal of turbidity were 89.4% obtained in the assays C S1 30g.L-1 and CF S2 for all concentrations. In spite of not reaching the values allowed by law, the percentage of removal achieved is considered high. For the pH it was noticed that the treatments caused a reduction, making it more acid, however the minimum values reached were 6.14 and 6.02 for S1 30 g.L-1 e S2 40 g.L-1 respectively. Keeping to the extent permitted by Consolidation Ordinance No. 5 Annex XX of September 2017, Ministry of Health. The parameters electrical conductivity and total dissolved solids were inferior with the S1 assays reaching the maximum 51.3 ppm (raw sample 40 ppm) and increasing significantly (153ppm for 40 g.L-1 treatment CF) with the S2 assays due to the addition of NaCl in the preparation of the S2 solution. As for the presence of metals, maximum values of Na were found with S1 4.2 mg.L-1 and S2 77.2 mg.L-1, of K values with S1 20.6 mg.L-1 and S2 28.5 mg .L-1, of Li with S1 0.36 mg.L-1 and S2 0.4 mg.L-1 and of Ca with S1 8.2 mg.L-1 and S2 14.6 mg.L-1. Therefore, the results show the efficiency of the chia seed with organic coagulant, enabling improvement and future use to water and effluents treatment. |
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