| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Univ Estadual Paulista UNESP, Inst Geociencias & Ciencias Exatas, Ave 24-A, 1515, C P 178, BR-13506900 Rio Claro, SP - Brazil
[2] Univ Estadual Paulista UNESP, Programa Posgrad Engn Civil & Ambiental, Av 24-A, 1515, BR-13506900 Rio Clam, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Chemical Engineering; v. 35, n. 4, p. 1203-1210, OCT-DEC 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
A temporal analysis of fractal aggregates during water flocculation is presented. Water was prepared using kaolin solution and a non-intrusive image-based analysis method was used for two-dimensional fractal dimension assessment (d(F)). The d(F) values were determined for aggregates larger than 270 mu m from 100 images taken in each combination of velocity gradients (G(f)) and flocculation times (T-f). The G(f) values of 20, 30, 40, 50 and 60 s(-1) and T-f values of 2 to 180 minutes were studied, with a Delta Tf of 1 minute for 2 <= T-f <= 10 minutes and a Delta T-f of 5 minutes for 10 <= T-f <= 180 minutes. Results showed that d(F) tends toward stability from a T-f of 40 minutes, with distinct levels in each G(f). Further, d(F) values decrease from 1.80 to 1.35 for G(f) from 20 to 60 s(-1). (AU) | |
| FAPESP's process: | 17/19195-7 - Numerical and morphological dynamics of fractal aggregates formed during flocculation and their effects on solid-liquid separation |
| Grantee: | Rodrigo Braga Moruzzi |
| Support type: | Scholarships abroad - Research |
| FAPESP's process: | 10/50694-0 - Development and application of an on-line floc sizer device aiming at the optimization of coagulation/flocculation and filtration |
| Grantee: | Marcelo de Julio |
| Support type: | Research Grants - Research Partnership for Technological Innovation - PITE |
| FAPESP's process: | 13/25641-9 - Procedure etermination for image acquisition to determine flocculent particles size in static reactors |
| Grantee: | Pedro Augusto Grava da Silva |
| Support type: | Scholarships in Brazil - Scientific Initiation |