Tratamento de água através do processo de eletrocoagulação associado ao uso de coagulantes orgânicos e inorgânicos
The availability of drinking water for human consumption is a major concern of current generations. Alternative methods and more efficiency for water treatment are some of the options to increase the population's access to quality water. The aim of this study was the application of electrocoagu...
| Autor principal: | Ferrareze, Caio Noboru Motomatsu |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/12054 |
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| Resumo: |
The availability of drinking water for human consumption is a major concern of current generations. Alternative methods and more efficiency for water treatment are some of the options to increase the population's access to quality water. The aim of this study was the application of electrocoagulation process for water treatment, comparing the efficiency of the process by itself, the process with the addition of organic coagulant (Tanfloc SG) and inorganic coagulant (ferric chloride). The execution of this work was done through 20 tests (according to pre-defined experimental design); in 4 cases the electrocoagulation process were done without adding coagulant. In the others 16, 8 were used for electrocoagulation with addition of inorganic coagulant and 8 for electrocoagulation with addition of organic coagulant. The tests were performed using a bench level reactor compost by an acrylic container of 2 L in volume, a magnetic stirrer, a source of electrical current, and a monopolar electrode system arranged by four iron plates connected in equidistant way in parallel. The parameters apparent color, turbidity and pH were analyzed according to the used process and the variables: concentration, electrical current and time of reaction. The concentrations used for inorganic and organic coagulants were 25 and 50 mg.L-1 dosed via 1g.L-1 solutions. The electric current ranged between 0,2 and 0,5 A, this variation was obtained through to the addition of 250 mg.L-1 of salt in the sample. The time of the tests ranged between 40 and 80 minutes. In the longer tests, measurements of the apparent color and turbidity were made in every 5 minutes for the analysis of removal of these parameters according to the time and to study the kinetic behavior of the concentration of the parameter turbidity. Among all electrocoagulation tests (using coagulating agents or not), the test 7, which were used 25 mg.L-1 of ferric chloride, 0,5 A of electrical current, and process time of 40 minute; was the one that stood out, resulting in an apparent color of 270 uH (70.33% removal), a turbidity of 12.4 NTU (96.77% removal) and pH of 9,2. The best values obtained according to time for the parameter apparent color was 161 uH (82.31% removal) after 5 minutes of the process using 25 mg.L-1 of the organic coagulant and 0,2 A of electric current. The best result for the parameter turbidity was 8.9 NTU (97.68% removal) after 50 minutes of the procedure using 25 mg.L-1 of the inorganic coagulant and 0,5 A of electrical current. The best results, considering the removal of both parameters was achieved after 25 minutes of the process using 25 mg.L-1 of the inorganic coagulant and 0,5 A of electrical current, the obtained values of 170 uH (81.32% removal) to the apparent color and 13,5 NTU (96.48% removal) to the turbidity parameter. |
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