The treatment efficiency under different
feeding condition of leachate dilution in the range of 5–75% (v/v) with a synthetic wastewater was studied.
A higher COD removal over 95% was maintained with leachate addition of 10% and 20% (v/v). Gradual decrease
in organic removals was observed as leachate percentage increase. At leachate addition of 25% the COD removal
reached value of 80%. For leachate concentration in influent above 30% (v/v) significant decrease of anaerobic
treatment efficiency due to inhibition of microbiological activity was observed.