Does polymeric aluminum chloride and polyacrylamide dewater sludge?

Sludge dewatering is governed by chemical potential gap depicted by Flory-Huggins theory. Thermodynamic mechanisms of sludge dewatering by chemical conditioning was revealed. This study investigated the combined effects of polymeric aluminum chloride (PAC) and polyacrylamide (PAM) on sludge dewatering, aiming to unveil underlying mechanisms.

Does PAC coagulation improve sludge dewatering performance?

This indicates that the bridging effect of sludge floc coagulation is better after the combined application of PAC and PAM, and the EPS structure is compressed by electric neutralization and adsorption, making the pore channels more visible and improving the sludge dewatering performance. Fig. 7.

What are the applications of polyacrylamide (PAM)?

As a result, PAM is widely used in municipal wastewater treatment, oil extraction, pulp and paper production, and other fields. Polyacrylamide is mainly used in the flocculation, sedimentation, and dewatering processes in municipal wastewater treatment.

How can Pam improve sludge dewatering performance?

It can enhance the flocculation effect of sludge and improve dewatering performance. (1) Dosage selection: Choose an appropriate PAM dosage based on the specific characteristics of the wastewater. Typically, the dosage ranges between 1-10 ppm. Adjust the specific dosage based on the wastewater treatment results.

What is the microstructure of sludge conditioned with Pam alone?

Fig. 7 a3 illustrates the microstructure of sludge conditioned with PAM alone, which appears significantly agglomerated and produces pores, providing a channel to discharge water and increasing dewatering capability.

Is sludge agglomerated after Pac conditioning?

After the addition of flocculants, the sludge appeared to be agglomerated, and the sludge particles after PAM conditioning were larger than the sludge floc structure after PAC conditioning.