<abstract xmlns="http://www.w3.org/1999/xhtml">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 (Np) 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<bold>. </bold>The models resulted from the Np variation versus Re are power function type Np = a ×Reb , where the coefficient a is a linear functions of H/d ratio and b = -1.016 have a constant value.</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 (Np) 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 Np = a ×Reb , where the coefficient a is a linear functions of H/d ratio and b = -1.016 have a constant value.

Mathematical model for power consumption at mixing of industrial and domestic wastewater sludge

Department of Technology and Chemical Engineering, Ovidius University of Constanta, 124 Mamaia Blvd, 900527 Constanta, Romania

Ovidius University Annals of Chemistry

Physical investigations have been carried out to characterize the power consumption in a laboratory autoclave vessel equipped with an anchor impeller (diameter...

Mathematical model for power consumption at mixing of industrial and domestic wastewater sludge

Published Online: Jan 17, 2014

Page range: 115 - 120

DOI: https://doi.org/10.2478/auoc-2013-0019

Keywords
wastewater sludge, mixing power, anchor impeller, Herschel-Buckley model

This content is open access.

Mathematical model for power consumption at mixing of industrial and domestic wastewater sludge

Published Online: Jan 17, 2014

Page range: 115 - 120

DOI: https://doi.org/10.2478/auoc-2013-0019

Keywordswastewater sludge, mixing power, anchor impeller, Herschel-Buckley model

This content is open access.

Keywords
wastewater sludge, mixing power, anchor impeller, Herschel-Buckley model