Apalm oil mill will be built in a rural industrial area. it is about 10 km from any town. the mill will draw water for operations from a nearby river which is upstream of intake source for domestic water of the nearby town. its waste water will be discharged into an adjacent stream (tributary of the river) that flow into the sea. its products will be exported by lorry tankers via the normal road. identify the probable composition of the effluent and key constituents and propose the efluent treatment plant using block flow diagrams