Treatment of sewage with lignosulfonate modified flocculant LSDC (2)

②Flocculation and dewatering of mixed papermaking sludge

The sludge was taken from the wastewater treatment plant of Guangzhou Paper Mill.

Also through the study of sedimentation speed and dehydration performance, the efficacy of the flocculant is obtained

Figure 3-29 Settlement curve of blank sludge and sludge after adding flocculant

Figure 3-30 The relationship between the amount of flocculant and the volume of natural filtration filtrate

The effect on the dewatering performance, when it is natural filtration, the flocculating agent's flocculation and dewatering of sludge is to change the sludge particle structure and destroy the colloidal stability of the sludge filtration performance.

When filtering under reduced pressure, the sludge dewatering experiment is carried out under the same operating conditions

Figure 3-31 The change of filtrate volume with time

Through research, it is found that LSDC flocculant can increase the average sedimentation speed of sludge from 1.