Flocculation-filtration method for harvesting

\nEuglena sp. is a type of microalgae that can produce various biomolecules including proteins, vitamins, carbohydrates, and can also be the best source of biomass because it contains lipids, which are especially useful for extracting and converting it into biodiesel. Unfortunately, harvesting Euglena sp. biomass is a challenge. Most of the production costs are occur in the harvesting process. The primary concerns revolve around efficiency levels and the operational costs. The methodology used in this study is by combining the flocculation method using Poly Aluminium Chloride (PAC) with the filtration method to answer the existing challenges. The purpose of this study is to provide scientific information related to efficient and effective methods for harvesting Euglena sp. The parameters measured in this study are Cell Density and dry weight of biomass. This study showed that by using the flocculation method first before the filtration method, through optimal settling time treatment, even by using cheap filtration materials.This study indicated that the flocculation method with optimal settling time treatment as a pretreatment before the filtration method is an efficient and effective method for harvesting Euglena sp.\n