NEUTRALIZATION OF ALKALINE WATER AT COASTAL LANDFILL SITES BY ULTRA FINE BUBBLE WATER

Abstract

 This study presents a series of the experimental results on the neutralization of leachate at coastal landfill sites by injecting water with ultrafine bubble (UFB) size gases containing CO₂ for stabilization enhancement and global warming countermeasures. Diffusion of neutralization by injecting UFB water into the experimental alkaline water was studied by experiments using a vertical column (3 m high). As a result, when the temperature and density differences between the UFB water and the experimental water were slight, the UFB water diffused upward and neutralized. The results suggest that, when applied to coastal landfill sites, the leachate's pH can be efficiently lowered by determining the injection depth of UFB water by measuring the temperature and density of the target water and UFB water in advance.