collected in a landfill leachate receptacle 1 the landfill leacheate then flows through a conduit wherein said in line addition 3 of one or more polymers occurs the treated landfill leachate then flows into a membrane unit 6 that is submerged in a tank 11 also polymer 10 may be added to the tank 11 containing the submerged membrane the submerged membrane may be an ultrafiltration membrane or a microfiltration membrane optionally the subsequent permeate 8 then flows through an additional membrane 9 that may be either a reverse osmosis membrane or a nanofiltration membrane referring to fig2 landfill leachate is collected in a landfill leachate receptacle 1 the landfill leacheate then flows through a conduit wherein said in line addition 3 of one or more polymers occurs the treated landfill leachate subsequently flows into a mixing tank 2 wherein it is mixed with a mixing apparatus 7 optionally additional polymer 4 is added to the mixing tank 2 the treated landfill leachate then travels through a pre filter 5 or clarifier 5 the treated landfill leachate then flows through a conduit into a membrane unit 6 that is submerged in a tank 11 optionally polymer 10 may be added to the tank 11 containing the submerged membrane the submerged membrane may be an ultrafiltration membrane or a microfiltration membrane optionally the subsequent permeate 8 then flows.