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  • performance of anammox uasb reactor treating low strength wastewater under moderate and low temperatures

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 693
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     an integrated approach to enhance and maintain high anammox activity and abundance in an upflow anaerobic sludge blanket (uasb) treating low strength wastewater under moderate and low temperatures was developed. a quantitative pcr assay showed the abandance of anammox bacteria to be 1.68 ± 0.08 × 109 copies/ml in mixed liquor when the temperature was 30 °c and was maintained at the level of 1.93 ± 0.41 × 109 copies/ml in mixed liquor at 16 °c. a nitrogen removal rate (nrr) of up to 5.72 kg n/m3/d was achieved with a hydraulic retention time (hrt) of 0.12 h at 30 °c, while nitrite and ammonium removal efficiencies were 94.35% and 92.81%, respectively. nrr decreased with a decrease in temperature and was maintained at 2.28 kg n/m3/d with an hrt of 0.28 h when at 16 °c, while nitrite and ammonium removal efficiencies were 92.31% and 78.45%, respectively. the emission rate of the greenhouse gas n2o was below 0.006% of the nrr in the anammox uasb reactor treating low strength wastewater.

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