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  • impact of worm predation on pseudo-steady-state of the circulating fluidized bed biofilm reactor

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 692
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper studies integrated simultaneous carbon and nitrogen removal as well as worm predation, in a circulating fluidized bed biofilm reactor (cfbbr) operated with an anoxic-aerobic bioparticle recirculation. a lab-scale cfbbr with a 8.5-liter reaction zone comprising 2 l anoxic and 6.5 l aerobic compartments was designed to evaluate the aquatic oligochaete worm effect. long-term (200 days) performance showed that stable and high-rate chemical oxygen demand (cod) with sodium acetate as the carbon source and total nitrogen (nh4cl as nitrogen source) conversions were achieved simultaneously, with low sludge production of 0.082 g vss (volatile suspended solids) g cod−1 at pseudo-steady-state. worm predation, which causes considerable sludge reduction of the bioparticle process, was studied. the results proved that the worm predation has a significant impact on the pseudo-steady-state performance of the cfbbr, decreasing biomass yield, decreasing oxygen concentration and increasing expanded bed height.

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