Dynamic membrane bioreactor (DMBR), as a new development of membrane bioreactor (MBR) technology, has attracted increasing attention recently. However, the effluent quality is usually affected by an incomplete rejection of sludge flocs and other suspended solids (SS) by the meshes. Herein, a novel aerobic granule dynamic membrane bioreactor (AGDMBR) is proposed. A comparison of the AGDMBR and DMBR systems was made in this study. According to the results, AGDMBR not only had higher NH4+ and turbidity removal, but also exhibited better anti-fouling capability than DMBR, implying a high potential of this technology for low-cost and efficient wastewater treatment. This better anti-fouling capability of AG might be attributed to the formation of a more porous biocake layer than AS. While the AS biocake tends to be compacted when it gets thick, the AG can remain a good porous structure attributed to its higher mechanical strength. After the 18h of filtration, the membranes were taken from both reactors to remove the surface biocake layer before SEM observation. As shown Figure 6, there was no pore blocking in the AG system attributed to a higher AG size than the mesh pore size. In contrast, a considerable amount of AS was found in the pores, leading to higher filtration resistance. [Huang T, Gui Y, Wu W, Feng K, Liu F (2013) A Comparative Study of Aerobic Granule and Activated Sludge Based Dynamic Membrane Reactors for Wastewater Treatment]
Last date updated on April, 2024
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