Abstract An environmental-friendly procedure has been developed for the fabrication of pure silicon carbide membranes on macroporous SiC support via ceramic processing. Water dispersions of α-SiC powders were used for deposition of membrane layers by dip-coating. The influence of the fine/coarse powder mixing ratio, solid loading, use of α-SiC powders with different particle sizes as well as sintering temperature on the structural morphology of the membranes were investigated in order to obtain uniform, homogeneous, and defect-free SiC membrane layers. The optimized protocol was up-scaled on industrial SiC tubular supports with high reproducibility, reducing the sintering temperature compared to conventional SiC membrane synthesis. The new SiC membranes were used for the treatment of a secondary effluent from Biofos wastewater treatment plant in Avedore, Denmark, and their performances evaluated in terms of removal of the suspended solids, colloidal particles and reduction of chemical oxygen demand. According to filtration results, the new SiC membranes showed high removal of suspended solids (99.4%) and colloidal particles (96%) along with significant reduction of chemical oxygen demand (83%). The pure SiC membranes developed in this study have a potential to be applied in the wastewater treatment since they combine the robustness of SiC with high selectivity.

中文翻译：

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用于废水处理的碳化硅膜的增强制造：从实验室到工业规模

摘要 已开发出一种通过陶瓷加工在大孔 SiC 载体上制备纯碳化硅膜的环保工艺。α-SiC 粉末的水分散体用于通过浸涂沉积膜层。研究了细/粗粉混合比、固含量、使用不同粒径的 α-SiC 粉末以及烧结温度对膜结构形态的影响，以获得均匀、均质和无缺陷的膜。碳化硅膜层。优化的协议在工业 SiC 管状支架上进行了放大，具有高重现性，与传统的 SiC 膜合成相比，降低了烧结温度。新的 SiC 膜用于处理来自丹麦阿维多尔 Biofos 废水处理厂的二次流出物，并在去除悬浮固体、胶体颗粒和减少化学需氧量方面评估了它们的性能。根据过滤结果，新型 SiC 膜显示出悬浮固体 (99.4%) 和胶体颗粒 (96%) 的高去除率以及化学需氧量 (83%) 的显着降低。本研究中开发的纯 SiC 膜具有应用于废水处理的潜力，因为它们结合了 SiC 的稳健性和高选择性。新型 SiC 膜显示出悬浮固体 (99.4%) 和胶体颗粒 (96%) 的高去除率以及化学需氧量 (83%) 的显着降低。本研究中开发的纯 SiC 膜具有应用于废水处理的潜力，因为它们结合了 SiC 的稳健性和高选择性。新型 SiC 膜显示出悬浮固体 (99.4%) 和胶体颗粒 (96%) 的高去除率以及化学需氧量 (83%) 的显着降低。本研究中开发的纯 SiC 膜具有应用于废水处理的潜力，因为它们结合了 SiC 的稳健性和高选择性。