A Study on the Acceleration of Landfill Stabilization by Chemical Oxidation

Abstract

We performed a laboratory scale test and examinations of using a lysimeter (id200mm * 1,000mm) and a large-scale tank (W1,750mm * L7,000mm * H2,000mm) to prove an effect of the method that accelerates waste stabilization by decomposing the hard degradable organic matter directly with oxidizing agent (the chemical oxidation Method).The mixture of bottom ash and compost was used as sham wastes. We carried out the chemical oxidation for the wastes by a hydrogen peroxide (H2O2). As a result, it was confirmed that the hard degradable organic matter decomposed and changed to the easy biodegradable organic matter, the oxidation effect improved when orthophosphoric acid was used as an assistant agent. In addition, with the chemical oxidation, air was supplied into the waste at the examination of using a large-scale tank, thereby COD and bio-chemical oxygen demand (BOD) in leachate remarkably decreased, it was suggested that chemical oxidation method could accelerate stabilization of landfill sites furthermore simultaneously aerating to keep aerobically could promote it.