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  • the effects of bacillus subtilis on nitrogen recycling from aquaculture solid waste using heterotrophic nitrogen assimilation in sequencing batch reactors

    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: -
     a sequencing batch reactor (sbr) supplied with bacillus subtilis (treatment group) was employed to treat the sludge from a re-circulating aquaculture system (ras). the crude protein content of bio-flocs from the treatment group increased from 21.52% ± 1.5% to 29.65% ± 13.34%, which was 23.97% ± 11.62% greater than that of the sbrs without b. subtilis (control group). the removal rate of dissolved inorganic nitrogen (rrdin) for the treatment group was 0.41 ± 0.079 mg l−1 d−1, which was 1.17 times greater than that of the control group. the utility rate of total organic nitrogen (urton) for the treatment group was 1.42 ± 0.33 mg l−1 d−1, which was 1.71 times greater than the control. the removal rate of dissolved organic carbon (rrdoc) for the treatment group was 138.39 ± 7.77 mg l−1 d−1, which was 1.95 times greater than the control. the extra-cellular polymer substance (eps) was primarily composed of polysaccharides. the flocs volume after 5 min (fv-5 min) reached 22.67% ± 2.08% at 19 days.

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