| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
Soil improvement techniques using microorganisms have recently been focused on as the low cost and environmentally friendly technique for practical use in Japan. Sporosarcina pasteurii is mainly used for this technique in almost all researches. In this paper, three laboratory tests were carried out to examine urease microorganisms which live in Japan for this bio-treatment technique. Results revealed that the urease microorganisms were found in all natural beach rocks from Okinawa that these microorganisms could reproduce calcium carbonates in soil. It was also found that the unconfirmed compression strength of the specimen treated with microorganism from beach rocks showed almost the same strength as the one with Sporosarcina Pastuerii. Therefore this microorganism is useful for the bio-treatment technique, instead of Sporosarcina pasteurii. Furthermore dissolved oyster shells can be used to this technique as a Calcium ion.
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