There are many different forms of filtration. These include dead-end filtration, microfiltration, pressure filtration, vacuum filtration and TFF. Filtration involves running the algal culture through filters with defined pore characteristics on which the algal cells accumulate, allowing the medium to pass through. The culture runs through the filters until the filter accumulates a thick algae paste [8]. It has been recognised that the use of fil ter presses under pressure or vacuum are effective methods to concentrate microalgal species that are considered to be large in hydro­dynamic size such as Spirulina plantensis. The recovery of small dimensioned algae species such as Dunaliella and Chlorella with size similar to that of bacteria is difficult to perform with pressure or vacuum filtration methods. Recent studies show that TFF and pressure fil tration can be considered as energy-efficient dewatering methods, as they consume optimum amounts of energy when considering the output and initial concentrations of the feedstock [8]. Simple filtration methods such as dead-end filtration are not effective dewatering methods on their own due to issues with back mixing. However, simple filters can be used in conjunction with centrifu­gation to create better separation [15].