The objective of the study was to experimentally evaluate the
efficiency of different fractions prepared by ultrafiltration of common
bean seed extract in water turbidity removal. Membraneseparation technique was applied instead of isolation and purification
multiple steps procedure to examine its suitability for the
processing of natural coagulant. Coagulation efficiencies of prepared
fractions were measured at different pH values and dosages,
and have been compared to the one of crude extract. In addition,
suitability of prepared natural coagulants was tested in respect of
organic load that remained in water after treatment.