The slightly higher CST values for the sludge sample from the full-scale WWTP are due to the higher sludge content; in fact, the measured values normalized to the solids content are very similar for the two sludge types.
The slightly higher CST values for the sludge samplefrom the full-scale WWTP are due to the higher sludge content;in fact, the measured values normalized to the solidscontent are very similar for the two sludge types.