| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Wastewater from pig farms contains phosphorus in high concentrations. The removal and recovery of phosphorus for reuse is considered desirable as phosphorus is a limited natural resource. We developed a phosphorus recovery system with low operating cost for purifying wastewater runoff at small-scale facilities in the swine industry. The system, which consists of a mature biofilm with oyster shell as the carrier, has a high purification capacity. Organic phosphorus compounds are adsorbed by the oyster shell and are taken up by microbes as polyphosphoric acid. Possible uses of the shells and biofilm matrix include phosphatic fertilizer production and desorption for phosphorus recovery.
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