Garbage produced inside an office building is mostly treated by an outside waste disposal contractor for about 20,000 yen per ton. Shimizu, one of Japan’s leading general contractors, developed equipment for in-house power generation for office buildings that uses garbage for generation. The newly developed equipment disposes of nearly all garbage including waste paper produced internally in an office building and makes it possible to reuse them as a source of energy. It has been hard to use garbage for in-house generation because it contains water, but the company successfully solved this problem.
Garbage is first dried and mixed with dry trash like paper waste, and subsequently is smothered in an oxygen-free condition to produce biogas. The biogas is ignited and burnt to generate by the gas engine for air-conditioning and lighting inside the building. The company will evaluate and test the generation performance of the equipment and wishes to put it into practical use after the spring of 2013. The price is not yet decided. This is reportedly the first in-house power generation equipment that uses garbage.
Shimizu's state-of-the-art technology to reduce carbon oxide emissions