光合细菌-膜生物反应器模拟工业通量处理啤酒废水的膜污染特性

In order to realize the industrial scale application of photosynthetic bacteria-membrane bioreactor (PSB-MBR), in this paper, PSB-MBR was used to treat beer wastewater under simulated industrial flux operating conditions, and the effects of operating parameters such as operating flux, PSB concentration, influent COD concentration, and temperature on membrane contamination in the PSB-MBR process were investigated. The results showed that high operating flux, PSB concentration, influent COD concentration, and low operating temperature would increase membrane resistance and membrane contamination, with influent COD concentration being the most important influencing factor. Compared to PSB-MBR operating at low flux, the PSB-MBR produces more serious membrane contamination at simulating industrial flux operation, with large number of contaminants covering the original structure of the membrane. The main contaminants were organic contamination from the PSB and its metabolites. At an industrial flux of 17.4 L·(m²·h)⁻¹, the PSB-MBR can be operated continuously. When physical cleaning (5 min water wash) cannot meet the system operation requirements, chemical cleaning with 0.75% NaClO solution for 2 h can restore 100% of the membrane flux. Operating at industrial flux, the membrane contamination of the PSB-MBR system was lower than that of conventional MBR and higher than that of the low flux PSB-MBR in existing studies. The results of this study can provide a reference for the industrial application of PSB-MBR.