| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
Continuous treatment of nitrification was operated using psychrotrophic nitrifiers accumulated from activated sludge. Influent NH4-N of 40 mg/L of domestic wastewater was removed to below 1.5mg/L by a loading of 0.25-0.30 kg-N/m3/day at 10C. Molecular analysis of bacterial community structure was applied to the carrier using a next-generation sequencer. Two percent of 23,848 reads was Nitrosomonadaceae. To apply for commercial plant, new immobilized pellet using low cost and low specific gravity was developed. A high nitrification rate of 0.16-0.20 kg-N/m3/day was obtained using new immobilized pellet at 4-5C.
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