This study has showed that coagulation and flocculation is a useful method in the treatment of biodiesel
wastewater. Coagulation and Flocculation is very effective in the suspended solids, color, Oil and Grease
removal and moderately effective in the COD removal of the biodiesel wastewater. In order to achieve better
percentage removal for COD, suspended solids, color and oil and grease, further treatment is needed.
Effectiveness from this study will able to reduce biodiesel wastewater pollutant before discharge into the
watercourse. As such, it is hoped that this method of treatment can become as one alternatives to Malaysia
biodiesel wastewater treatment process in future.