Municipal Solid Waste Landfill Technology in Japan

According to it, the amount of emissions has increased until 2000, reaching a peak of about 50 million t annually and then turned to decline.

The landfill technologies have developed with the changes of landfill waste materials, which changed with the upstream parts of a process, that is, collection process or intermediate processing system.

As mentioned above, landfill technology varies across landfill waste qualities. Japan started with whole amount landfill technology, and using a landfill technology for incineration residues, mainly composing inorganic substance at present. On the other hand, the developing countries began with sanitary landfill technology, and the technology transfer of Japan’s “semi-aerobic landfill” is underway.

The landfill site takes several decades through the processing of during landfilling, completion of the landfill, and abolishment, it becomes a negative legacy of the area. Therefore, the kind of construction that can be abolished at an early stage and maintenance technology is required. For this purpose, it is necessary to utilize pre-treatment technology and post-treatment technology. In the case of new construction, positioning and early stabilization technology based on the scientific basis is required. In the case of the old landfill site constructed in the past, it is also necessary to be reprocessed by re-excavation and regenerate into one with new technology. The landfill technologies until now have not been linked with the technology of the incineration facility, and the landfill technology and leachate treatment technology cannot respond to the sophistication of exhaust gas treatment equipment in incineration facilities and the method of stabilizing fly ash. It takes a long time to stabilize the landfill layer. From now on, incineration facilities, crushing sorting facilities and landfill sites will need to function as a waste management system.

Technology for Japan’s final disposal is towards symptomatic treatment and post-treatment; it has been formed and developed through trial and errors. Japan is considered to be one of the countries with the most advanced technology even by international standards.