Nutrient Removal from Leachate

Remediation of the City of Zagreb Jakusevec Dump Site, one of the largest dump sites in Europe, is in progress. Experimental laboratory results of leach­ ate treatment using aquatic macrophytes show that increasing the concentra­ tion of ammonia in the leachate decreases elimination efficiency. In all series of experiments, significantly greater elimination of ammonia and orthophos­ phates has been obtained in planted than in unplanted mesocosms. For polish­ ing the effluent from the pilot constructed wetland in the polishing pond the following species might be recommended: Phragmites australis, Myriophyllum verticilatum, Ceratophyllum demersum, Lemna minor and Salvinia natans.