Using synthetic polymers in clarifying of turbid wastewater is a very expensive method, in addition to their monomers toxicity produced from the polymerisation reaction. Those drawbacks encouraged several scientists who were interested in eco-friendly sustainable materials to discover an upright replacement to clarify turbid wastewater. The present study introduces Gum Arabic (GA) as a health-friendly natural polymer flocculant, which could be applied in the pre-filtration process of oil mill wastewaters (OMWW) treatment. GA-silica as a model work and GA-OMWW interaction was investigated experimentally by turbidimetric technique and mathematically by GraphPad Prism® software, since plateau followed by one phase decay was a good fit at adding 1250 and 12500 mg of polymer, while one phase decay was selected as a proper fit for 12.5 and 125 mg. Results supposed that the biopolymer improves markedly the sedimentation performance of suspended materials. Digital micrographs agreed with the turbidity results.