Department of Aquatic Environmental Engineering, Karlsruhe Institute of Technology, Gotthard-Franz-Str. 3, Karlsruhe 76131, Germany; Department of Urban Water Engineering, University of Kassel, Kurt-Wolters-Street 3, Kassel 34125, Germany E-mail:
Department of Aquatic Environmental Engineering, Karlsruhe Institute of Technology, Gotthard-Franz-Str. 3, Karlsruhe 76131, Germany.
Water Sci Technol. 2022 May;85(9):2737-2747. doi: 10.2166/wst.2022.144.
A new concept of a rotating membrane module in a membrane bioreactor (MBR) system was tested for its effect on oxygen transfer in clean water and wastewater. The membrane module consists of horizontally aligned hollow fibres connected to the vertically positioned permeate tube which rotates. The results indicated that oxygen transfer can be improved by up to 50% at the highest applied rotational speed (50 rpm) and that the additional energy demand required for the rotation can be compensated by the enhanced oxygen transfer. However, at the highest rotational speed (50 rpm), the fine bubbles bypassed the MBR module, and, consequently, could not contribute to any cleaning effect. The α-factors at different rotational speeds showed similar results. This indicates that the depletion was caused neither by surfactants nor by viscosity phenomena but rather by the floc/solid holdup of the sludge.
一种新型旋转膜组件在膜生物反应器（MBR）系统中的应用，用于考察其对清水和污水中氧传递的影响。该膜组件由水平排列的中空纤维组成，与垂直放置的渗透管相连，渗透管可以旋转。结果表明，在最高转速（50rpm）下，氧传递可提高 50%，并且旋转所需的额外能量需求可以通过增强的氧传递来补偿。然而，在最高转速（50rpm）下，微小气泡绕过 MBR 模块，因此无法对任何清洁效果做出贡献。不同转速下的α 因子得到了相似的结果。这表明，这种损耗既不是由表面活性剂引起的，也不是由粘性现象引起的，而是由污泥的絮体/固体停留引起的。
