Planted Batch System Treating Leachate

Abstract

The aim of this study was investigation of changes in the nutrients and COD, pH and electrical conductivity in two batch systems planted with Lemna gibba L. to treat leachate. For this aim NH₄⁺-N, NO₂^--N, NO₃^—N, O-PO₄^3-, COD, pH and electrical conductivity were determined. Experimental studies were established in batch systems with two various depths (5 cm and 10 cm) and various hydraulic retention times. Removal efficiencies which were obtained for NH₄⁺-N and O-PO₄^{-3 in the batch reactors with depth of 5 cm were between 40.4-70.2% and 18.8-32.0%, respectively and in the batch reactors with depth of 10 cm were between 39.8-68.1% and 18.2-27.2%, respectively. The NO}₂^--N and NO₃^--N concentrations of effluents were higher than the initials. Removal efficiencies which were obtained for COD in the batch reactors with depth of 5 cm were between 52.0-58.0% and in the batch reactors with depth of 10 cm were between 51.1-55.4%. pH of the leachate which had an initial value of 7.91 reached to a maximum of 8.50. Conductivity which had an initial value of 5.59 mS/cm reached to a maximum of 8.04 mS/cm.