Hi everyone, I'm working on application of Extracellular Polymeric Substance as coagulant / flocculant in wastewater treatment. After inoculated with EPS, floating scum formed which suspended solid did not sediment well. How can I sediment the scum effectively? should I combine my EPS with other chemical coagulant like FeSO4 or alum? or is there any method to add posiitive charge on EPS so that it can settle well? Thanks.