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张事, 马方凯, 徐望朋, 王健, 李迎喜, 吴振斌, 张学治. 膜前助滤预处理对高藻水微滤膜污染的影响研究[J]. 水生生物学报, 2023, 47(7): 1078-1086. DOI: 10.7541/2023.2022.0056
引用本文: 张事, 马方凯, 徐望朋, 王健, 李迎喜, 吴振斌, 张学治. 膜前助滤预处理对高藻水微滤膜污染的影响研究[J]. 水生生物学报, 2023, 47(7): 1078-1086. DOI: 10.7541/2023.2022.0056
ZHANG Shi, MA Fang-Kai, XU Wang-Peng, WANG Jian, LI Ying-Xi, WU Zhen-Bin, ZHANG Xue-Zhi. INFLUENCE OF ASSISTED FILTRATION PRETREATMENT ON MEMBRANE FOULING DURING THE TREATMENT OF ALGAE-RICH WATER BY MICROFILTRATION[J]. ACTA HYDROBIOLOGICA SINICA, 2023, 47(7): 1078-1086. DOI: 10.7541/2023.2022.0056
Citation: ZHANG Shi, MA Fang-Kai, XU Wang-Peng, WANG Jian, LI Ying-Xi, WU Zhen-Bin, ZHANG Xue-Zhi. INFLUENCE OF ASSISTED FILTRATION PRETREATMENT ON MEMBRANE FOULING DURING THE TREATMENT OF ALGAE-RICH WATER BY MICROFILTRATION[J]. ACTA HYDROBIOLOGICA SINICA, 2023, 47(7): 1078-1086. DOI: 10.7541/2023.2022.0056

膜前助滤预处理对高藻水微滤膜污染的影响研究

INFLUENCE OF ASSISTED FILTRATION PRETREATMENT ON MEMBRANE FOULING DURING THE TREATMENT OF ALGAE-RICH WATER BY MICROFILTRATION

  • 摘要: 研究采用添加硅藻土、植物棉、活性炭等3种不同预处理手段来过滤铜绿微囊藻, 并考察未预处理及预处理后的藻液过滤过程中的过滤特性、有机物分布及膜污染特性。结果表明, 3种预处理手段对过滤通量均有所提高并减缓膜污染。其中, 硅藻土预处理提高平均过滤通量达915%, 明显优于其他助滤手段。活性炭预处理能够有效吸附芳香族蛋白质类荧光污染物, 显著降低污染膜的不可逆化学污染阻力。通过OCT及SEM分析可知未预处理的高藻水直接过滤造成的膜污染最严重, 饼层结构的粗糙度最低并且厚度也最小, 而硅藻土通过优化饼层结构以达到缓解膜污染的效果。最后基于XDLVO理论结果也进一步证实硅藻土预处理手段对改善膜污染效果最好。研究结果对未来蓝藻水华膜处理技术的预处理手段研发具有指导意义。

     

    Abstract: Membrane filtration technology has the advantages of well algae-water separation and sewage purification during the treatment of algae-rich water. Different pretreatment methods can affect the filtration characteristics and membrane fouling. In this study, three different pretreatment methods of diatomite, cotton plant and activated carbon were employed to filter Microcystis aeruginosa suspensions to compare their filtration characteristics, retention of algogenic organic matter and membrane fouling. The results revealed that the three pretreatment methods increased filtration flux and reduced membrane fouling. Among them, the diatomite pretreatment could increase the filtration flux by 915%, which was significantly better than other pretreatment. Activated carbon pretreatment could effectively adsorb aromatic protein-like compounds, and obviously decrease the resistance of irreversible chemical fouling. OCT and SEM analysis showed that no pretreatment caused the most serious membrane fouling, the lowest roughness and thickness of cake layer structure, while diatomite pretreatment could obviously mitigate membrane fouling by optimizing the cake layer structure. Meanwhile, the XDLVO theoretical results further confirmed that diatomite pretreatment had the best alleviating effect on membrane fouling. For further insight, the results provide valuable guidance for the development of membrane filtration of algae suspensions.

     

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