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Membrane Fouling Mitigation in Different Biofilm Membrane Bioreactors with Pre-anoxic Tanks for Treating Mariculture Wastewater by Hanqing Wang; Huining Zhang; Kefeng Zhang; Yongxing Qian; Xin Yuan; Bixiao Ji; Wanling Han is a Environmental Science article available to read on EtoBox.

What is Membrane Fouling Mitigation in Different Biofilm Membrane Bioreactors with Pre-anoxic Tanks for Treating Mariculture Wastewater about?

This study compared the membrane fouling mitigation in two novel types of biofilm membrane bioreactor coupled with a pre-anoxic tank (BF-AO-MBR)-namely a fixed biofilm membrane bioreactor (FB-MBR) with fiber bundle bio-carriers and a moving-bed biofilm membrane bioreactor (MB-MBR) with suspended bio-carriers-relative to an anoxic/oxic MBR (AO-MBR), at salinities ranging from zero to 60 g/L. The results showed that the FB-MBR mitigated membrane fouling to a greater degree than the MB-MBR and AO-MBR. During operation, the FB-MBR exhibited the lowest fouling development, with three membrane filtration cycles, while the AO-MBR and MB-MBR had 22 and nine cycles, respectively. The key fouling factor in all reactors was cake layer resistance (R), which contributed to 89.61, 62.20, and 83.17% of the total fouling resistance (R) in AO-MBR, FB-MBR and MB-MBR, respectively. Additionally, in the FB-MBR, the pore blocking resistance (30.07%) was also an important cause of fouling. Fiber bundle bio-carriers and suspended bio-carriers reduced the R by 37.68% and 21.24% (mainly the R) compared to that of AO-MBR. Furthermore, FB-MBR and MB-MBR caused a decrease of suspended biomass (80.14 and 15.90

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Author

Hanqing Wang; Huining Zhang; Kefeng Zhang; Yongxing Qian; Xin Yuan; Bixiao Ji; Wanling Han

Publisher

Elsevier Science; Elsevier ; Elsevier BV; Publons (ISSN 0048-9697)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)