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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

FRACTAL AGGREGATES EVOLUTION DURING FLOCCULATION

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Author(s):
Moruzzi, R. B. [1] ; de Oliveira, A. L. [2] ; de Almeida, T. [2]
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