A laboratory experiment on denitrification was carried out in order to develop a technology for treatment of leachate from municipal waste landfill. The authors have already collected fundamental data from a previous experiment on denitrification in a confined test tank. The present experiment was performed in a circulating test tank with inflow load. It was investigated how parameters such as carbon, phosphorus, denitrification bacteria and inflow nitrogen load influenced on denitrification rate. It was found that phosphorus is an important control factor in addition to carbon in leachate denitrification. A negative functional dependency of denitrification rate on inflow load was also confirmed, which provides useful information for development and planning of a treatment plant capacity. A design concept for the leachate treatment was proposed based on the experiment.
