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Abstract Biofilms have permeable structures, which can be used as membranes for solids separation, e.g., dynamic membrane bioreactors (DMBRs) that relied on the biofilm developed on the support material with… Click to show full abstract
Abstract Biofilms have permeable structures, which can be used as membranes for solids separation, e.g., dynamic membrane bioreactors (DMBRs) that relied on the biofilm developed on the support material with large apertures for filtration. This study found that the biofilm formed on the support material in DMBRs under different solids retention time (SRTs) had diverse structures, which in turn determined the hydraulic resistance and filtration performance. At 5-day SRT, a thin but compact gel-like biofilm layer (porosity = 27.5%) was formed on the support materials, which had a higher hydraulic resistance of approximately 4.9 × 1011 m−1. As a result, the transmembrane pressure (TMP) rose dramatically every 20–40 days' operation. A thick but porous biofilm layer (porosity > 60% and hydraulic resistance
Journal Title: Journal of Membrane Science
Year Published: 2019
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