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  • sub-critical filtration conditions of commercial hollow-fibre membranes in a submerged anaerobic mbr (hf-sanmbr) system: the effect of gas sparging intensity

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 594
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a submerged anaerobic mbr demonstration plant with two commercial hollow-fibre ultrafiltration systems (puron®, koch membrane systems, pur-psh31) was operated using municipal wastewater at high levels of mixed liquor total solids (mlts) (above 22 g l−1). a modified flux-step method was applied to assess the critical flux (jc) at different gas sparging intensities. the results showed a linear dependency between jcand the specific gas demand per unit of membrane area (sgdm). jc ranged from 12 to 19 lmh at sgdm values of between 0.17 and 0.5 nm3 h−1 m−2, which are quite low in comparison to aerobic mbr. long-term trials showed that the membranes operated steadily at fluxes close to the estimated jc, which validates the jc obtained by this method. after operating the membrane for almost 2 years at sub-critical levels, no irreversible fouling problems were detected, and therefore, no chemical cleaning was conducted.

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