Physicochemical　treatment,　consisting　of　a　combination　of　primary　settling,　coagulation-flocculation-aided　clarification　(alum,　lime　and　magnesium　sulfate　as　coagulants)　and　activated　carbon　adsorption,　was　employed　for　the　treatment　of　pulp　and　paper　mill　wastewater.　Treatability　studies　were　undertaken　to　assess　the　feasibility　of　recycling　the　effluents　from　a　paper　mill.　The　results　of　laboratory　scale　investigation　showed　that　the　hydraulic　retention　time　(HRT)　of　four　hours　for　plain　settling　was　effective　to　reduce　30%　of　the　pollution　load　from　pulp　and　board　mill　wastewater　(PBMWW).　The　chemical　secondary　treatment　reduced　turbidity　(89%),　Chemical　Oxygen　Demand　(84%),　total　suspended　solids　(90%)　and　color　(89%)　at　the　mass　loading　of　3400　mg/L　of　magnesium　sulfate　(MgSO4),　when　primary-treated　effluent　was　subsequently　treated　by　the　coagulation-flocculation　process.　The　combination　of　primary　settling　and　lime　coagulation　(optimum　dosage　of　1400　mg/L)　resulted　in　a　turbidity　removal　of　94%,　a　COD　(Chemical　Oxygen　Demand)　reduction　of　86%,　a　Total　Suspended　Solids　(TSS)　removal　of　93%　and　color　removal　of　91.6%　at　an　initial　pH　of　11.　The　combination　of　this　primary　settling　and　coagulation-flocculation　treatment　trial　indicated　that　the　pollutant　reduction　efficiency　of　alum　was　better　than　the　other　two　coagulants　(MgSO4,　lime),　because　the　plain　settling　and　coagulation-flocculation　process　with　alum　(optimum　dosage　of　1200　mg/L)　resulted　in　a　turbidity　removal　of　98%,　COD　reduction　of　93%,　TSS　removal　of　98%　and　color　removal　of　96%　at　the　pH　6.0　with　the　sludge　volume　index　of　156　mg/L.　This　chemically-treated　water　required　further　treatment　with　activated　carbon　in　a　batch　reactor　for　up　to　four　hours　to　meet　the　paper　mill　water　quality　standards.　Pollutant　reductions　at　the　rate　of　99.5%,　99.1%,　99.4%　and　99.5%　were　obtained　for　turbidity,　COD,　TSS　and　color,　respectively,　with　the　combination　of　the　sedimentation,　coagulation-flocculation　process　and　activated　carbon　adsorption　meeting　the　production　process　quality　standards.　The　study　revealed　that　a　hybrid　end-of-pipe　physicochemical　treatment　was　effective　in　reducing　the　pollutant　load　of　paper　mills　effluent　and　meeting　the　discharging　standards.