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  • changes in the nitrogen removal performance and the properties of granular sludge in an anammox system under oxytetracycline (otc) stress

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 761
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the short- and long-term effects of oxytetracycline (otc) on the anaerobic ammonium oxidation (anammox) process were evaluated. the otc inhibition of anammox was substrate-, and especially nitrite-, dependent. the ic50 of otc in the batch tests on an anammox mixed culture was calculated to be 517.5 mg l−1. the long-term effects of otc on the anammox process were examined in a continuous-flow upflow anaerobic sludge blanket reactor. fifty milligrams per liter of otc significantly decreased the nitrogen removal rate from 12.4 to 2 kg n m−3 d−1 within 26 days. the recovery of anammox performance after otc inhibition was accelerated by adding biocatalyst. in contrast to the modified stover–kincannon model, the modified boltzmann model accurately simulated the recovery of anammox performance. otc presented in the influent led to sludge hardening and cell lysis. a poor settling property of anammox sludge was also observed.

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