System analysis and evaluation of solid waste management facilities. Studied so far are RDF production facilities, Shredding facilities of bulky waste, WEEE(Waste electrical and electronic equipment) Recycling facility, Packaging waste Recycling facilities, Composting facilities, and Methane fermentation facilities. Mass balance, energy balance, and cost are main interest for analysis. Based on knowledge and data by these studies, LCA Model of Integrated solid waste management system was constructed, and published with CD in 2005.
Estimation of stability of landfill. Aeration of waste is the key technology to promote stabilization of waste in landfill. We found that passive gas vent work to collect air from outside, it turns out an efficient aeration. Mechanism of the aeration is studied byfield survey in MSW landfills of different conditions: semi-aerobic/anaerobic, new/old, rich/poor organic contents.
MSW Collection. Collection of waste is not efficient due to small truck, large crue size, frequent collection, and increased number of source separation categories in Japan. Data were collected by driving after collection vehicle to record time and distance to move or collection for six types of source separated waste. Model to estimate collection works will be constructed.
Other interests are: Household hozardous waste generation/collection/disoposal, Waste Characterization of detailed composition to construct database for better planning, Lifecycle analysis of MSW incineration process, etc.