| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
A novel wastewater treatment system combined an anoxic upflow sludge bed (USB) reactor with a nitritation reactor for a high-strength nitrogenous organic wastewater was developed and the performance was investigated experimentally. Soluble organic matter removal efficiency was attained to be over 95% and the TN removal occurred effectively depending on the recycle ratio of nitrified liquor to the influent wastewater under the experimental conditions within less than 0.56 of the influent TN/COD ratio by mass, less than 30 kg-COD/(m^3 d) of influent COD loading, less than 4 kg-N/(m^3 d) of influent TN loading and less than 11 of recycle ratio of nitrified liquor to the influent wastewater. The granules in the USB reactor consistently had the activities for both methanogenesis and denitrification. The microbial community analysis indicated that Thauera spp. and Alcaligenes spp. as denitrifying bacteria and Methanosaeta spp. as methanogenic archaea appeared in the granules.
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