ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

Temperature Effect on Rheological Properties of Cattle Manure Slurry

Chen, Y-R
Agricultural engineer and lab mechanic, Roman L. Hruska U.S. Meat Animal Research Center, Agricultural Research Service, U.S. Department of Agriculture, Clay Center, NE

Shetler, EL
Agricultural engineer and lab mechanic, Roman L. Hruska U.S. Meat Animal Research Center, Agricultural Research Service, U.S. Department of Agriculture, Clay Center, NE

Abstract

A constant temperature rotational viscometer was fabricated for studying temperature effect on rheological properties of beef cattle manure slurries having total solids concentrations (TS) ranging from 2.5 to 19.3%. The rheological properties of the slurries had shear rates ranging from ∼ 20 to 200 s⁻¹ and temperatures ranging from 14 to 64°C. In this shear rate range, it was found that the power-law equation could be used to describe the slurry's shear stress and shear rate relationship. Apparent viscosity of the slurry was found to decrease as temperature increased, and increase as TS increased. Equations to express the apparent viscosity as a function of TS and absolute temperature were given. The activation energy (Andrade's equation) of the beef cattle manure slurries was found to be 13.8 kJ/mol.

Keywords:
rheological properties, slurries, solids, rotational viscometer, cattle manure, temperature effect, apparent viscosity

Paper ID: JTE10298J
DOI: 10.1520/JTE10298J
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