Abstract: An improved method for treating leachate from a sanitary landfill is provided. The method includes the steps of adding a pH adjuster to elevate the pH of the leachate, such that ammonia nitrogen compounds, COD compounds, and VOCs form volatiles and heavy metals form insoluble compounds; combusting landfill gas to produce combustion products and to elevate the temperature of the leachate such that chemical activity is enhanced therein; gas stripping the volatiles from the leachate; precipitating the insoluble compounds from the leachate; and diffusing the combustion gases through the leachate to reduce the pH thereof to an acceptable discharge level.