The mechanism of auxiliary chemical phosphorus removal was researched by experiments in view of the simultaneity of chemical function and biological function.It′s suggested that there is biological and chemistry synergistic function in the process of auxiliary chemical phosphorus removal.Both positive and negative effects on activated sludge flocs are made by chemical flocculant.When Dosage/TP initial value <30,biological and chemical synergistic function is enhanced with the increase of dosage and the high...