Di Bella G, Durante F, Torregrossa M, Viviani G, Mercurio P, Cicala A
Dipartimento di Ingegneria Idraulica ed Applicazioni Ambientali dell'Universita di Palermo, Viale delle Scienze 90146, Palermo, Italy.
Water Sci Technol. 2007;55(8-9):455-64. doi: 10.2166/wst.2007.290.
The present study has aimed to quantify the role of pore blocking and cake layer in a laboratory scale hollow fibre membrane module in submerged configuration, The membrane reactor (MBR) was fed with raw wastewater, only screened with a 2-mm sieve, collected from the Palermo WWTP. The MBR was characterised by an operating volume of 190 L and equipped with an aeration system located on the bottom of the reactor. The MBR operated for 65 days. The permeate was extracted by imposing a constant flux through the membrane (21 Lh(-1) m(-2)). The results confirm the importance of pore blocking control during start-up. In particular, it provides a rapid irreversible fouling that takes place at the beginning of the filtration process, before the deposition mechanism. Therefore, low suspended solids concentration in the initial phase causes a fast irreversible fouling. This circumstance creates the need for more frequent chemical cleaning after start-up without inoculum. Finally, the results underline that the cake has a mainly reversible feature.
本研究旨在量化浸没式配置的实验室规模中空纤维膜组件中孔堵塞和滤饼层的作用。膜生物反应器（MBR）采用从巴勒莫污水处理厂收集的原废水进料，仅经过2毫米筛网筛分。该MBR的操作体积为190升，底部设有曝气系统。MBR运行了65天。通过在膜上施加恒定通量（21 Lh(-1) m(-2)）来提取渗透液。结果证实了启动过程中控制孔堵塞的重要性。特别是，它会导致在过滤过程开始时、沉积机制之前发生快速不可逆的污染。因此，初始阶段低悬浮固体浓度会导致快速不可逆的污染。这种情况使得在无接种物启动后需要更频繁地进行化学清洗。最后，结果强调滤饼主要具有可逆特性。
