Waste activated sludge (7 - 13 wt%) flow curves at elevated temperature conditions (80 - 140 °C)

The measurements were carried out on a DHR-3 rheometer (TA-Instruments), equipped with a pressure cell geometry. Measurement protocol summary: 1) Waste activated sludge samples loaded into pressure cell.2) Nitrogen gas used to purge air from pressure cell.3) Nitrogen gas used to pressurise pressure cell to 5 bar.4) Flow curve generated for sample at 25 °C. Flow curves were generated by presetting a decreasing logarithmic shear-rate sweep.5) Sample heated to desired set point (80 °C).6) Once reached, flow curves were generated periodically at constant temperature (80 °C) over a 60 minute period.7) Sample cooled down to 25 °C and final flow curve generated.8) Sample replaced and repeat at new desired temperature (80 - 140 °C).

Detailed experimental protocol is recorded in the .tri (TRIOS) file attached with each data set. This file can be read using the TRIOS software made available on TA-Instruments website (tainstruments.com/support/software-downloads-support/downloads/). Rheometer geometry dimensions and other details are also obtainable from these files.