Abstract
The objective of this study is to evaluate the floc size formed during the flocculation step in Water Treatment Plants (WTP), its shear strength and the capacity of the sheared floc (breakage) to return to its original size (reversibility) using a metal coagulant (alum), that is the same one applied in the WTP located in Sao Jose dos Campos, Sao Paulo, Brazil - and two polymeric flocculan…