浸没式PVDF超滤膜在大型再生水厂的中试研究
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摘要
将浸没式PVDF超滤膜应用于美国West Basin再生水厂的中试系统,在同一进水水质和运行条件下,考察其与水厂现有浸没式PP超滤膜系统在市政污水处理系统的运行效果和清洗效果。结果表明:在9个月的连续运行过程中,与水厂现有系统的浸没式PP超滤膜相比,浸没式PVDF超滤膜可在原系统PP膜组件2. 28倍运行通量的条件下稳定运行,跨膜压差稳定在13. 8～82. 7 kPa;产水水质更好,产水浊度小于0. 1 NTU,且运行风险更小;具有良好的机械性能,运行9个月零断丝或破损。
Submerged PVDF ultrafiltration membrane was pilot tested in the West Basin Reclaimed Water Plant. Under the same influent quality and operation conditions,the operation and cleaning effects were compared between the submerged PVDF ultrafiltration membrane system and the existing submerged PP ultrafiltration membrane system. The results showed that,compared with the existing submerged PP ultrafiltration membrane system,the submerged PVDF ultrafiltration membrane could operate steadily under the operating flux of 2. 28 times of the submerged PP ultrafiltration membrane,and the transmembrane pressure (TMP) could be maintained at 13. 8-82. 7 kPa in a nine months continuous operation. Submerged PVDF ultrafiltration membrane demonstrated a high efficiency in turbidity removal,and the effluent turbidity was below 0. 1 NTU. The PDT test showed good membrane integrity after nine months of continuous operation.
Submerged PVDF ultrafiltration membrane was pilot tested in the West Basin Reclaimed Water Plant. Under the same influent quality and operation conditions,the operation and cleaning effects were compared between the submerged PVDF ultrafiltration membrane system and the existing submerged PP ultrafiltration membrane system. The results showed that,compared with the existing submerged PP ultrafiltration membrane system,the submerged PVDF ultrafiltration membrane could operate steadily under the operating flux of 2. 28 times of the submerged PP ultrafiltration membrane,and the transmembrane pressure (TMP) could be maintained at 13. 8-82. 7 kPa in a nine months continuous operation. Submerged PVDF ultrafiltration membrane demonstrated a high efficiency in turbidity removal,and the effluent turbidity was below 0. 1 NTU. The PDT test showed good membrane integrity after nine months of continuous operation.
引文
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[2]张吉库,明月.陶瓷平板膜处理采油废水过程中的膜污染及清洗研究[J].水处理技术,2015,41(8):76-80.Zhang Jiku,Ming Yue.The pollution and cleaning of plate ceramic membranes in oil extraction wastewater treatment[J].Technology of Water Treatment,2015,41(8):76-80(in Chinese).
[3]倪明,马克,朱新民,等.浸没式超滤膜清洗工程案例分析[J].膜科学与技术,2010,30(5):64-66.Ni Ming,Ma Ke,Zhu Xinmin,et al.A case analysis on chemical cleaning of submerged ultra-filtration membrane[J].Membrane Science and Technology,2010,30(5):64-66(in Chinese).
[4]黄明珠,曹国栋,李冬梅,等.浸没式超滤膜污染监测与清洗效果分析[J].给水排水,2009,35(7):9-13.Huang Mingzhu,Cao Guodong,Li Dongmei,et al.Discussion on fouling monitoring and cleaning effect of submerged UF membrane[J].Water&Wastewater Engineering,2009,35(7):9-13(in Chinese).