Dynamic characterization of a FeCl3 -dosed anaerobic membrane bioreactor (AnMBR) treating municipal wastewater

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Qirong DongMartha Dagnew

Abstract

A transient study was conducted at pilot scale to assess the impact of Fe dosage on the dynamics of biological and membrane performance of an anaerobic membrane bioreactor (AnMBR) treating authentic municipal wastewater. A transient model of the AnMBR system was employed to assist with interpretation of the observed responses in the mixed liquor under different FeCl3 dosages. A high dosage (43 mg FeCl3/LSewage) resulted in a significant accumulation of fixed suspended solids and volatile suspended solids (VSS) and reduction of colloidal COD in the mixed liquor. The elevated dosages appeared to reduce the biodegradability of VSS that was present in the raw wastewater. Intermediate dosages of FeCl3 (21-12 mg/L) had less effect on these responses and did not appear to affect VSS biodegradation. Membrane performance was significantly affected by FeCl3 dosage as indicated by reversible resistance (RR) and physically irreversible resistance (IR). RR was closely related to the colloidal COD in the mixed liquor, thus responded quickly to Fe dosage. Physically, IR had a delayed response to changes in the colloidal COD concentrations in the mixed liquor and this was attributed to the effect of slow mass transfer of colloidal matter betwe...Continue Reading

References

Oct 4, 2007·Water Environment Research : a Research Publication of the Water Environment Federation·Fengshen FanHadi Husain
Jul 14, 2011·Environmental Science & Technology·Perry L McCartyJeonghwan Kim
May 23, 2012·Bioresource Technology·Adam L SmithLutgarde Raskin
May 26, 2015·Water Research·Qirong DongMartha Dagnew
Feb 27, 2017·Water Research·Fangang MengSo-Ryong Chae

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Citations

Jul 1, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Sara ArabiValetta Saldanha

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