Multi stage treatment of high strength leachate

The paper presents the results of treatability studies on high strength lan dfill leachate (COD=7880 mg l(-1); TOC = 2360 mg l(-1); NH3-N=590 mg l(-1)) . During the studies physicochemical methods, biological treatment and an o zonation were tested. Optimization of treatment using each treatment method was performed. It has been determined that preaeration of leachate with 50 mg l(-1) of phosphoric acid, followed by biological treatment (anaerobic a nd aerobic) and ozonation achieved removal of 99.6 % of ammonia and 92 % of GOD. The treatment system produced the high quality effluent,suitable for discharge to the surface water.