Developing of open channel classification technique for removal of fine particle fraction from municipal solid waste incineration bottom ash

Abstract

At the sea surface disposal site, it takes time to stabilize the reclaimed waste, which increases the cost of maintenance and smooth land use, and requires measures for early stabilization.It is known that incinerator ash with a small particle size contains a large amount of pollutants, and early stabilization is expected by removing the fine particle classification (particle size 0.425 mm or less) from incineration ash and performing sea surface disposal. In this study, focusing on open channel classification, we conducted open channel classification demonstration experiments.As a result, about 60% of fine particle classification was able to be removed among input incineration ash.The sedimentation velocity of incineration ash in the open channel was slower than the theoretical value, and the sedimentation velocity of the classification object particle diameter (particle diameter 0.425 mm) was about 80% of the Allen equation.In addition, it was confirmed that the amount of pollutant components was larger in the runoff ash than in the sedimentary ash, and a stabilization promotion effect by open channel classification was expected.