Depending on algae’s type and concentration, algae often have undesirable effects on water treatment procedures like ultrafiltration (UF) membrane processes, especially during algae blooms (Henderson et al., 2008). The presence of algae and algae by-products can cause severe fouling and cake deposition on the membrane due to its accumulation (Babel & Takizawa, 2010). In surface water, the typical algal condition can be found in the three states lag phase, exponential phase, stationary phase and death phase in diverging portions. Various types of algae produce different amount of algal organic matter (AOM) and also cause different fouling behaviour in UF membrane applications. This research work focused on the comprehensive comparison between the two cell samples, “intact-living” (mostly present in exponential phase) and “lysed” (mostly present in death phase), in terms of membrane fouling potential, hydraulic backwash-ability, and chemical enhanced cleaning ability.