Polyacrylamide selection programs and precautions:① flocculant selection must take full account of the process and equipment requirements.② can increase the flocculant molecular weight to improve the strength of flocs.③ flocculant charge value must be screened by experiment.④ climate change (temperature) affect the selection of flocculants.⑤ according to the size of flocs to process the choice of flocculant molecular weight.⑥ flocculant before treatment must be fully mixed with the sludge dissolved.
