Effects of Sprinkling Water and Aeration Treatments on the Elution Characteristics of MSWI Bottom Ash
散水・通気処理が焼却主灰の溶出性に与える影響

Hiroshi Kubota, Koga Shigeizumi, Hiromi Yamada, Shuntaro Noguchi, Kenichi Sato
2017 Journal of the Japan Society of Material Cycles and Waste Management  
The physical and chemical characteristics of MSWI bottom ashes from four different areas were investigated. The effects of sprinkling water and aeration on the elution characteristics of bottom ash were also researched. Treatments using the same liquid-solid ratio for two differing periods (1 day or about 50 days) were set up to study the effects of hydraulic intensity and ventilation volume. The quantities of Na and TOC eluted by the water-sprinkling treatment (L/S=0.5-0.6) were found to be
more » ... ut the same as for mechanical washing (L/S=10) if the intensity of the water sprinkling was optimized for each ash type. The results suggested that aeration for 50 days accelerated elution of Cl and inhibited elution of TOC. The elution of Cl was particularly affected by the initial chemical and mineral composition. This research also showed that aeration was more effective at inhibiting the elution of Pb and Ca than washing out by sprinkling water.
doi:10.3985/jjsmcwm.28.199 fatcat:jbdcno5huzbatkq37z3zf2ikje