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  • effect of temperature on aob activity of a partial nitritation sbr treating landfill leachate with extremely high nitrogen

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 620
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this study investigates the effects of temperature on ammonia oxidizing bacteria activity in a partial nitritation (pn) sequencing batch reactor. stable pn was achieved in a 250 l sbr with a minimum operating volume of 111 l treating mature landfill leachate containing an ammonium concentration of around 6000 mg n-nh4+ l−1 at both 25 and 35 °c. a suitable influent to feed an anammox reactor was achieved in both cases. a kinetic model was applied to study the influence of free ammonia (fa), the free nitrous acid (fna) inhibition, and the inorganic carbon (ic) limitation. nh4+ and no2concentrations were similar at 25 and 35 °c experiments (about 2500 mg n-nh4+ l−1and 3500 mg n-no2 l−1), fa and fna concentrations differed due to the strong temperature dependence. fna was the main source of inhibition at 25 °c, while at 35 °c combined fa and fna inhibition occurred. dgge results demonstrated that pn-sbr sludge was enriched on the same aob phylotypes in both experiments.

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