Abstract Improving the nitrogen and phosphorus removal rates and efficiently controlling membrane fouling are the keys to fully exploiting the applicability of anaerobic membrane bioreactor (AnMBR) process in high-concentration wastewater treatment. To that purpose, an integrated reactor composed of an anaerobic ceramic membrane bioreactor and N anaerobic fluidized bed (AnCMBR-AFB) was built and pollutant removal efficiency, nitrogen and phosphorus recovery characteristics, and membrane pollution features of this integrated reactor were investigated. The results revealed that the integrated reactor had good pollutant removal efficiency, with turbidity, chromaticity, and UV254 average values of the effluent being 0.470 NTU, 0.011 A, and 0.057 cm−1, respectively, and the average CODCr removal rate was 80%. The nitrogen and phosphorus recoveries were significantly higher than the nitrogen and phosphorus removal rates of conventional AnMBR at 23.20 ± 1.17% and 43.34 ± 1.54%, respectively. Microscopic analysis revealed the formation of magnesium ammonium phosphate (MAP) crystals on the carrier's surface, and friction between the carrier and the membrane surface could delay membrane fouling while allowing the contaminated membrane surface to retain significant roughness. Membrane fouling was mostly brought on by amides and saturated hydrocarbons, and inorganic metal ions also played a role to some extent.

中文翻译：

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AnCMBR-AFB一体化工艺处理高氮磷废水

摘要提高氮磷去除率和有效控制膜污染是充分发挥厌氧膜生物反应器（AnMBR）工艺在高浓度废水处理中的适用性的关键。为此，搭建了由厌氧陶瓷膜生物反应器和N厌氧流化床组成的一体化反应器（AnCMBR-AFB），并研究了该一体化反应器的污染物去除效率、氮磷回收特性以及膜污染特征。结果表明，一体化反应器具有良好的污染物去除效率，出水浊度、色度和UV254平均值分别为0.470 NTU、0.011 A和0.057 cm−1，CODCr平均去除率为80%。氮、磷回收率显着高于传统AnMBR的氮、磷去除率，分别为23.20±1.17%和43.34±1.54%。显微镜分析表明，载体表面形成了磷酸镁铵（MAP）晶体，载体与膜表面之间的摩擦可以延缓膜污染，同时使受污染的膜表面保持显着的粗糙度。膜污染主要是由酰胺类和饱和烃类引起的，无机金属离子也有一定的作用。