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Efeito da concentração de coagulantes e do pH da solução na turbidez da água, em recirculação, utilizada no processamento dos frutos do cafeeiro
| Content Provider | Semantic Scholar |
|---|---|
| Author | Matos, Antonio Teixeira De Cabanellas, Cláudia Figueiredo Garrido Cecon, Paulo Roberto Mudado, Cláudio S. |
| Copyright Year | 2007 |
| Abstract | Aiming the determination of the dose and pH range of the coagulants aluminum sulfate (AS), chlorinated ferrous sulfate (CFS), ferric chloride (FC) and Moringa oleifera seed extract (MSE) that would provide a higher efficiency in removing the turbidity from the coffee cherry pulping wastewater (CPW), five recirculations were accomplished and the coagulation/flocculation assays were conducted, by using the Jar-test device. The concentrations (0; 0.5; 1.0; 1.5; 2.0; 2.5 and 3.0 g L - 1) were evaluated. In the case of the MSE-prepared solution, the following doses were used: 0; 10; 20; 30; 40; 50 and 60 mL L-1. The pH of the solution under test was changed, by using the sodium hydroxide (NaOH) at the concentration of 0.3 mol L-1, whereas the ranges from 4.0 to 5.0; 5.0 to 6.0; 6.0 to 7.0; and 7.0 to 8.0 were evaluated. In the coagulation/flocculation assay, the MSE provided a higher suspended solid removal (SSR) from the CPW at the dose of 10 mL L-1 and 4.27 pH (natural). For the coagulants AS and FC, the best results were obtained at the concentration of 3 g L-1 and 7.27 pH, whereas, for the CFS coagulant, at the concentration of 3 g L-1 and 4.27 pH. |
| Starting Page | 544 |
| Ending Page | 551 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1590/S0100-69162007000300025 |
| Volume Number | 27 |
| Alternate Webpage(s) | http://www.scielo.br/pdf/eagri/v27n2/a25v27n2.pdf |
| Alternate Webpage(s) | https://doi.org/10.1590/S0100-69162007000300025 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
