ERT data for 3% and 5.5% WAS

The sludge samples were measured at various gas flow rates (1 LPM to 7 LPM). The ERT measurements were generated from the sludge sample first during gas injection across 20 minutes.

Then the gas injection was stopped and the ERT measurements were continued for 20 minutes. The measurements were carried out using Electrical resistance tomography from Industrial Tomography Systems which was equipped with a specially designed plexiglass cup (105mm inside diameter and 100 mm length) with a stainless steel porous disk (outer diameter: 100 mm, thickness: 1.6mm, porosity: 40%, from SINTEC Australia) at the bottom of the cup.