College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China; Shenzhen Academy of Environmental Sciences, Shenzhen 518001, PR China.
Department of Civil and Environmental Engineering, University of Auckland, Auckland 1142, New Zealand.
Bioresour Technol. 2017 Nov;244(Pt 1):934-940. doi: 10.1016/j.biortech.2017.08.069. Epub 2017 Aug 15.
In previous studies, cake layer analysis in membrane bioreactor (MBR) was both carried out with synthetic and practical municipal wastewater (SMW and PMW), leading to different results. This study aimed to identify the comparison between SMW and PMW in cake layer characteristic analysis of MBR. Two laboratory-scale anoxic/oxic MBRs were operated for over 90days with SMW and PMW, respectively. Results showed that PMW led to rough cake layer surface with particles, and the aggravation of cake layer formation with thinner and denser cake layer. Additionally, inorganic components, especially Si and Al, in PMW accumulated into cake layer and strengthened the cake layer structure, inducing severer biofouling. However, SMW promoted bacterial metabolism during cake layer formation, thus aggravated the accumulation of organic components into cake layer. Therefore, SMW highlighted the organic components in cake layer, but weakened the inorganic functions in practical MBR operation.
在先前的研究中，膜生物反应器（MBR）中的蛋糕层分析分别使用合成废水和实际城市污水（SMW 和 PMW）进行，得到了不同的结果。本研究旨在确定 SMW 和 PMW 在 MBR 中蛋糕层特性分析方面的比较。两个实验室规模的缺氧/好氧 MBR 分别用 SMW 和 PMW 运行了 90 多天。结果表明，PMW 导致蛋糕层表面粗糙，颗粒状物质增多，且蛋糕层形成加剧，蛋糕层更薄且更致密。此外，PMW 中的无机成分，特别是 Si 和 Al，在蛋糕层中积累并加强了蛋糕层结构，导致更严重的生物污染。然而，SMW 在蛋糕层形成过程中促进了细菌代谢，从而加剧了有机成分在蛋糕层中的积累。因此，SMW 突出了蛋糕层中的有机成分，但削弱了实际 MBR 运行中无机成分的作用。
