Impact of gas injection on the viscosity of waste activated sludge

Auteurs

V. Bobade, J. Baudez, G. Evans, and N. Eshtiaghi

Référence

in Chemeca 2016, Adelaide, Australia, 25-28 September 2016

Description

Sludge exhibits different flow properties at different concentration, temperature and pressure. Knowledge of real time sludge rheology is extremely important for the efficient and optimised operation of sludge treatment process. The aeration in activated sludge process has a significant influence on fluid properties and which in turn influences mass transfer rates. In this work we study the influence of gas injection on rheological parameters by using two different geometries (Vane and Bob) The results of impact of gas injection on the rheological behaviour of the activated sludge was more evident under the low mechanical shear rates and tends to remain constant at high shear rates irrespective of the gas flow rate. However on comparing the results for both type of geometry with same gas flow rate, concentration and same shear rate range same trend of graph with minor difference in viscosity was observed.