232-3 Yomogida Naruko-onsen Oosaki, Miyagi, JAPAN 989-6711
Field Science Center
Greeting from Project Leader
April 1, 2007
Graduate School of Agricultural Science, Tohoku University
Professor Dr. Yutaka Nakai
Vast amount of organic wastes are disposed from the forest, mountainous area, agricultural land, urban area and coastal area, and deposited in the environment. The deposition causes the pollution of terrestrial environment, and causes the depletion of organic resources on the earth. Proper recycling and reusing systems of the organic wastes must be constructed as soon as possible to solve the issue. The composting (Taihi-ka) that has been used for a long time in Japan is one of the methods of the solution. However, former technologies of the composting tended to cause the ammonia emission to become the acid rain, the phosphoric acid excess of the arable land due to the large quantity of application of the low nitrogen compost, and the eutrophication of the surface water and gland water, followed by the serious destruction of the environment.
As the novel technology, Tohoku University developed an acidic composting system for the food remainder. The system can control the ammonia emission and will be an ideal system of non-environmental-load compost. The proper circulation of the organic wastes is not achieved only by that technology. The safety of the produced compost by the detailed analysis of the component and also the functionality and utilization characteristic by the land application experiment should be evaluated. We have started the research of these evaluations in the Field Center, Graduate School of Agricultural Science, Tohoku University. The cost performance that is big issue for the compost utilization has been analyzed from both point of view of natural and social sciences by using such as land observing satellite data and life cycle assessment methods.
For the practical application, cooperating studies with researchers who know the actual agriculture and field and also land application experiments are essential. Then Tohoku University and Miyagi Prefectural Government signed the agreement of the cooperating fusion. Cooperating workshops and activities have been started to interchange the information between Tohoku University and experimental institutes and stations of the prefecture.
We would like to construct the novel model of the new circulating systems on the stage of Miyagi prefecture by the development of new technologies and the cooperation with the researchers in the Tohoku area. We will keep dispatching the information of the integrated compost science to the world.
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