A study has been done on the treatment of effluent wastewater resulting from pulp and paper mills using the integrated coagulation, sedimentation and filtration process. Three of the most effective coagulants have been evaluated: alum, ferric chloride, and poly aluminum chloride (PAC) for the chemical precipitation stage and geotextile filter for the filtration process. The optimum dose of alum, ferric chloride, and PAC used were 25 ppm, 5 ppm, and 100 ppm, respectively, which reduce COD by 80%, 81%, and 82% and reduced TSS by 97%, 96%, 95% respectively. A comparison between the three chemicals in performance, dose, price and sourcing was done. As a result, ferric chloride with a dose of 5 ppm was the best coagulant which was used as primary treatment. The effect of using geotextile filter as secondary processed treatment by plain or chemical coagulation was also tested and evaluated. Results showed that using a geotextile filter as a slow rate filter after plain sedimentation provides realistic and better operational results, with a running time of up to 13 and 6.5 days before reaching 100% clogging at a filtration rate of 2 and 5 m3/m2/d respectively. While using geotextile filter after chemical precipitation increase the running time of the filter up to 16.5 and 7.6 days before reaching 100% clogging at a filtration rate of 2 and 5 m3/m2/d respectively. The results also showed that using plain sedimentation before geotextile filtration yields good results without the need to add an expensive chemical coagulant, as the COD removal ratio reaches to 85 and 90% at filtration rate of 5 and 2 m3/m2/d respectively and the TSS removal ratio reaches to 100%.