Mathematical model for power consumption at mixing of industrial and domestic wastewater sludge
Journal Title: Ovidius University Annals of Chemistry - Analele Universităţii "Ovidius" Constanţa. Seria chimie - Year 2013, Vol 24, Issue 2
Abstract
Physical investigations have been carried out to characterize the power consumption in a laboratory autoclave vessel equipped with an anchor impeller (diameter d = 0.068 mm), without baffles, at 8 speed ratio, from 100 to 800 rpm. The laminar flow regime was investigated using sludge proceeding from the treatment of mixed industrial and domestic wastewater, with a view to its subsequent processing: mixing, filtration, dewatering. The mathematical modeling focused on finding an accurate equation linking the Power number (N[sub]p[/sub]) and the Reynolds number (Re) at different levels (H) of sludge in the vessel. The rheological curves indicate that the sludge have non-Newtonian behaviors which are better described by the Herschel-Buckley model. The models resulted from the Np variation versus Re are power function type , where the coefficient a is a linear functions of H/d ratio and b = -1.016 have a constant value.
Authors and Affiliations
Ancaelena Eliza STERPU, Claudia Irina KONCSAG , Anca Iuliana DUMITRU , Alina-Daniela MIHALCEA
Keywords
Related Articles
- EP ID EP162356
- DOI -
- Views 88
- Downloads 0
Estimation of the refractive index of diesel fuel+biodiesel blends
For now, biodiesel is the commonly accepted biofuel as a substitute for diesel fuel in internal combustion engines. Diesel fuel blends with up to 20% biodiesel can be used in diesel engines without any modification. A l...
Corrosion behavior of steel in biodiesel of different origin
This study aims to characterize the corrosion behavior of steel by static immersion tests in biodiesel obtained from three different types of vegetable oils (sunflower oil, rapeseed oil and corn oil) at room temperature...
Effect of thermal treatment on antioxidant activity and colour of carrot purées
Total antioxidant activity, levels of bio-active compound groups and instrumental colour of carrot purée subjected to thermal treatment (70°C/2 min) were measured. The method applied to the dosage of ascorbic acid was wi...
In vivo quercetol effect in lead acetate poisoning
The present study investigated the influence of quercetol upon δ-aminolevulinic acid (Δ –ALA) urine concentration as marker of lead poisoning. The study was conducted on six lots of 6 mature Wistar rats of both sexes, lo...
Hydrogenation of 1-octene by Co-Mo/MCM-41 catalysts
The synthesis and characterization of MCM-41 supported Co-Mo catalysts and catalytic hydrogenation of 1-octene to n-octane were discussed. BET specific surface area of MCM-41, calculated from N[sub]2[/sub] adsorption/des...