Significance of the study
The use of only conventional methods in treating swine wastewater, such as anaerobic ponds and anaerobic digesters, cannot succeec in meeting the effluent standard . Using Chlorella sp, as a biological treatment process, for further treatment of this wastewater. however, results in high efficiency . It not only removes certain amounts of organic substances and nutrients, but also produces useful by-products of algal cell, which have various uses. However, a proper biomass is removal process is needed in order to prevent pollution of water resources