Algae is igniting much interest as a promising biofuel source due to its high photoreaction rate, fast growing rate, carbon fixation ability, and high oil contents. However, there are still many obstacles that prevent the algae biofuel technology from becoming fully commercialized such as difficulties in high concentration farming and collection and high-energy costs. Filtration is one of the many possible algae collection methods. In this research, two different types of coagulants, PACl and Chitosan, are added before dead end filtration of pure algae in order to study the difference in flux and algae collection efficiency. The algae used in this experiment are Chlorella sp. which are commonly found in water From the results, it is observed that the flux increases with increasing concentration of coagulants added to the influent. Also, coagulation and sedimentation treatments have limited effects on the DOC removal efficiency. However, if MF membrane is used in dead end filtration, the DOC removal efficiency will be improved. It is observed that microcystins can be released after coagulation and sedimentation treatments, and filtration can effectively remove microcystins. Finally, coagulation can lead to a higher solid content of the settling particles. However, the solid content is not dependent on the coagulant concentration. From the flux recovery experiments, it is observed that the small algal particles in the supernatant are the major cause for membrane blocking, and cake resistance determines the overall filtration resistance. The formation of cake from flocs with large particle diameter on the membrane can effectively reduce membrane blocking.