Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
Bioresour Technol. 2013 Jul;140:1-9. doi: 10.1016/j.biortech.2013.04.056. Epub 2013 Apr 23.
A novel composite hollow fiber membrane for membrane aerated biofilm rector (MABR) was prepared by coating L-3,4-dihydroxyphenylalanine (DOPA) on the surface of PVDF membrane. MABR process study was conducted to test the performances of the original and modified membranes for 166 days. The results indicate that coated membrane showed 2 times higher gas flux, lower water contact angle (declined from 86.5° to 52°), and significantly improved surface roughness. The modified membrane displayed an excellent MABR performance. Its COD, NH4(+)-N and TN removal efficiencies were kept above 90%, 98.8% and 84.2% during the first 4-month experiment. By tracking experiment at 0.01 MPa, to achieve COD removal efficiency of 85.9%, half an hour is required with the modified membrane, instead of 6h using the original one. Besides, faster NH4(+)-N and TN removal at 0.01 MPa were also achieved with DOPA composite membrane.
一种新型复合中空纤维膜用于膜曝气生物膜反应器（MABR），通过在聚偏氟乙烯膜表面涂覆 L-3,4-二羟基苯丙氨酸（DOPA）来制备。对 MABR 工艺进行了研究，以测试原始和改性膜的性能，时间为 166 天。结果表明，涂层膜的气体通量提高了 2 倍，水接触角（从 86.5°下降到 52°）更低，表面粗糙度显著提高。改性膜表现出优异的 MABR 性能。在最初的 4 个月实验中，其 COD、NH4(+)-N 和 TN 的去除效率保持在 90%、98.8%和 84.2%以上。通过在 0.01 MPa 下的跟踪实验，改性膜达到 85.9%的 COD 去除效率所需的时间为半小时，而原始膜则需要 6 小时。此外，DOPA 复合膜在 0.01 MPa 下也实现了更快的 NH4(+)-N 和 TN 去除。
