Abstract
The coastal landfill sites are really important and essential infrastructure for our country. However, the decomposition of organic matters and washout of contamination components in these coastal landfill sites are very slow and there is a concern about accelerated stabilization. Researchers show that the fine particle fraction of municipal solid waste incineration ash contains more contamination components. Hence, removing the fine particle fraction from municipal solid waste incineration ash will reduce the contaminants of possessed seawater in the landfill sites.
Consequently, it is necessary to establish the method to remove fine particle fraction efficiently from incineration ash. This study focused on open channel classification technique. We conducted a demonstration experiment on open channel classification, and investigated the classification effects. A total of three cases were set up by changing the water depth and velocity of the open channel flow, and each experiment was repeated twice for accuracy.
At first, the velocity of open channel flow was measured using an ultrasonic current mater to determine hydraulic property in the open channel. The velocity fulfilled the experimental conditions around the vicinity of the water surface, but the water has viscosity, this velocity decreased drastically follow the depth of open channel. Next, the particle size distribution of incinerated ash that settled in the open channel was determined, and it was confirmed whether the fine particle fraction division was removed.
As a result of the experiment, it was found that the decrease of the fine particle division was observed on the upstream side, and the effect of the classification was increased when the water depth and the vicinity value was increased. In the future, we will develop more effective open channel classification technique based on the result of this experiment.
