What is the optimum dosage of polyacrylamide?

It can achieve 95% of turbidity reduction, 98% of TSS removal, 93% of COD reduction and sludge volume index (SVI) of 14 ml g −1 at the optimum dosage of 5 mg l −1. SVI values of less than 70 ml g −1 are found for all polyacrylamide at their respective optimum dosage.

Can polyacrylamide be used to treat pulp and paper mill wastewater?

SVI values of less than 70 ml g −1 are found for all polyacrylamide at their respective optimum dosage. Based on the cost evaluation, the use of the polyacrylamides is economically feasible to treat the pulp and paper mill wastewaters.

Can polyacrylamides improve alum coagulation in pulp and paper mill wastewater?

Request PDF | Improvement of alum and PACl coagulation by polyacrylamides (PAMs) for the treatment of pulp and paper mill wastewater | A study using coagulation–flocculation method for the treatment of pulp and paper mill wastewater has been carried out.

What is water soluble polyacrylamide (PAM)?

1. Introduction Water-soluble polyacrylamide (PAM) is used in various industries as a displacement agent, drilling mud additive, and sewage treatment agent (Bao et al., 2010, Sojka et al., 2007). It is also widely used in the oil recovery industry in China, resulting in large amounts of PAM-polluted wastewater.

Are cationic and anionic polyacrylamides effective in flocculation of pulp and paper mill wastewater?

The flocculation performances of nine cationic and anionic polyacrylamides with different molecular weights and different charge densities in the treatment of pulp and paper mill wastewater have been studied.

Which polyacrylamide is best?

The best polyacrylamide chosen is the cationic Organopol 5415 with very high molecular weight and low charge density, after taking into consideration its removal efficiency with respect to turbidity, TSS and COD and also SVI. The optimum dosage of Organopol 5415 is 5 mg l −1.