Kale Mayur Milan, Singh Kripa Shankar
a Department of Civil Engineering , University of New Brunswick , Fredericton , Canada.
b Department of Civil and Chemical Engineering , University of New Brunswick , Fredericton , Canada.
Environ Technol. 2016 Aug;37(15):1883-94. doi: 10.1080/09593330.2015.1135990. Epub 2016 Feb 8.
An analysis of foulants and the performance of membranes in innovative sludge-bed anaerobic membrane bioreactors (SB-AnMBRs) were evaluated at mesophilic (35°C for approx. 400 days) followed by thermophilic (55°C for approx. 400 days) temperatures while treating the prehydrolysis liquor (PHL) waste stream from a dissolving pulp production plant. The membrane fouling of SB-AnMBR was analyzed for 0.1, 0.15 and 0.2 m(3)/m(2)/d flux conditions. Physico-chemical analyses of the membrane showed that the combination of 5% citric acid, 0.5% NaOCl and 2% NaOH solutions was effective in achieving more than 80% recovery of membrane flux. Chemical characterization of foulants showed that proteins were more predominant in membrane fouling than carbohydrates. Sugars and lignin contribution were negligible as compared to proteins in the total organic carbon content of the foulant. Membrane fouling occurred through a biofilm-dominated process and organic fouling. Combination of cleaning chemicals which included 0.5% NaClO and 2% NaOH solutions was most effective in the removal of the organic foulants. SEM analysis showed the pictorial evolution of the impact of fouling on the pore openings and the effect of cleaning on the membrane surface.
在中温（35°C，约400天）然后高温（55°C，约400天）条件下，对创新型污泥床厌氧膜生物反应器（SB - AnMBRs）中处理溶解浆生产厂的预水解液（PHL）废水流时的污垢和膜性能进行了分析。在通量为0.1、0.15和0.2 m³/m²/d的条件下，对SB - AnMBR的膜污染进行了分析。对膜的物理化学分析表明，5%柠檬酸、0.5%次氯酸钠和2%氢氧化钠溶液的组合能有效实现超过80%的膜通量恢复。污垢的化学表征表明，蛋白质在膜污染中比碳水化合物更占主导地位。与蛋白质相比，糖和木质素在污垢的总有机碳含量中的贡献可忽略不计。膜污染通过生物膜主导的过程和有机污染发生。包括0.5%次氯酸钠和2%氢氧化钠溶液在内的清洗化学品组合在去除有机污垢方面最有效。扫描电子显微镜（SEM）分析显示了污垢对孔口影响的图像演变以及清洗对膜表面的影响。
