Does polyaluminum chloride coagulate with hydrolyzed coagulants?

Coagulation with hydrolyzing coagulants has been studied thoroughly, but the coagulation behavior of pre-hydrolyzed coagulants such as polyaluminum chloride (PACl), especially the coagulation mechanisms at various coagulant dosages and pH values of raw water, has not been systemically investigated and not been well understood , .

Is polyaluminium chloride better than polyelectrolyte – alum-based coagulation?

At the Barekese Water Treatment Plant in Ghana, an alternative, the polyelectrolyte – polyaluminium chloride (PAC) is also used in coagulation but limited information is available on the operating conditions required to achieve better performance than alum-based coagulation.

Does polyelectrolyte –polyaluminium chloride Formance improve coagulation performance in water treatment?

At the Barekese Water Treatm ent Plant in Ghana, an alternative, the polyelectrolyte –polyaluminium chloride formance than alum-based coagulation. The aim of this study was to determine the optimal coagulant dose, mixing speed and operating pH for enhanced performance in water treatment.

Does final pH affect optimal PACL dosage during charge neutralization coagulation?

Effect of final pH on optimal PACl dosage (as Al), zeta potential, and PACl precipitation at the optimal dosage during charge neutralization coagulation.

What happens when PACL dosage increases?

Stabilization, charge neutralization destabilization, restabilization and sweep zones occur successively with increasing PACl dosages with the final pH values fixed at 7.0 and 8.0, but restabilization zone disappears at final pH 10.0.

Is polyaluminium chloride better than alum?

Application of polyaluminium chloride under the recommended process conditions produces relatively better quality treated water than alum application. Freshwater is finite and required for human and ecosystem survival.