A one-parameter model for granulation
TL;DR: In this paper, a single parameter model is proposed to describe the reduced number density function of granules as a function of reduced granule size, and the relationship between model parameter and the empirical ballability index proposed in the literature is shown to be monotonic.
About: This article is published in Chemical Engineering Journal.The article was published on 1982-01-01. It has received 4 citations till now. The article focuses on the topics: Population balance equation & Granulation.
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382 citations
TL;DR: Lower toxicity and higher biodegradability characterized the electrolyzed solution, EC(50) value increased from 7% to 58% and BOD(5)value increased from 4 to 9 mg O(2) L(-1) after electrolysis leading to an increase of the BOD on COD ratio from 0.19 to 0.4.
75 citations
TL;DR: The relevance of a photocatalytic pretreatment prior to a biological process for removal of organic pollutants was examined in this article, where high mineralization allowed to remove bisphenol A and 2,4-dichlorophenoxyacetic acid.
Abstract: The relevance of a photocatalytic pretreatment prior to a biological process for removal of organic pollutants was examined. Owing to the significant residual amount and toxicity, amitrole was not relevant. High mineralization allowed to remove bisphenol A and 2,4-dichlorophenoxyacetic acid. Isoproturon and diuron cannot be considered due to the slight evolution of chemical oxygen demand/ total organic carbon (COD/TOC) and average oxidation state during irradiation. After photocatalysis, the ratio of biological oxygen demand (BOD5)/COD remained below the biodegradability limit (0.4) for the rest of the molecules. A favorable COD/TOC trend (decrease during irradiation) was recorded for dimethoate and antibiotics. However, dimethoate and sulfamethoxazole seemed not pertinent due to the long time span for their removal. Since a decrease of toxicity was only recorded for tylosine, it can be selected for subsequent tests.
17 citations
TL;DR: In this paper, an equation for granulation kinetics has been derived on the basis of the mass balance of the material being granulated, and a rate of mass fraction growth was presented taking into account the influence of granules of both larger and smaller size.
6 citations
References
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TL;DR: In this paper, the authors reviewed the solutions to the kinetic equation of coagulation from the standpoint of their asymptotic behavior, and showed that the shape of the self-preserving spectrum is greatly influenced by the form of the collision frequency factor.
440 citations
108 citations
TL;DR: In this paper, a population balance equation for kinetics of granulation in the ball growth region by non-random coalescence mechanism has been proposed and it is shown that the granule-size spectra eventually acquire a self-preserving form and the rate of growth of the median granule dia obeys a power function law.
90 citations
50 citations
TL;DR: In this article, the effects of stirring speed, baffles, solids loading, particle size and bridging liquid concentration on spherical agglomerate growth were investigated using sands, dispersed in agitated carbon tetrachloride and agglated with calcium chloride aqueous solutions.
42 citations