Study of antifouling modified ultrafiltration membrane based on the secondary treated water of urban sewage

Release time:2024-08-09  Hits:

• Affiliation of Author(s):化学与化工学院
• Journal:Water Science and Technology
• Key Words:中文关键字：抗污染; 亲水化共混改性;二级出水; 超滤膜; 城市污水，英文关键字：antifouling; hydrophilic blending modified; second
• Abstract:Mixtures of polyvinylidene fluoride (PVDF) and polyvinyl alcohol (PVA) containing hydrophilic ultrafiltration membranes were prepared by adding PVA (5 to 30%) to PVDF by the phase inversion method. The hydrophilic contact angle (CA), equilibrium water content, pure water flux and bovine serum albumin retention were studied to assess the membrane performance. The anti-fouling performance of modified membrane to the secondary treated water was evaluated by flux decline, washing recovery rate and fouling resistance analysis. Scanning electron microscopy showed that the cross-section structure of the membranes had finger-like pores, which were well developed and uniformly distributed, and the sub-layer structure was looser and more porous with the increasing content of PVA. The CA gradually decreased. The steady fl ux was 800 L/m2h from P15 to P30, and the BSA retention sharply declined. The ultrafiltration tests for secondary treated water indicated that the main fouling source of the modified membrane was the concentration polarization and cake layer resistance. After physical flushing, the flux recovery ratio of the membrane could reach 100% when the PVA content was 5–15%, which shows excellent anti-pollution performance and good prospects for use in processing wastewater from urban sewage.
• Note:孟晓荣
• Co-author:黄丹曦
• First Author:miaorui,wangxudong,wanglei,zhaoliang,mengxiaorong
• Indexed by:Journal paper
• Volume:卷：66
• Issue:期：10
• Page Number:页：2074-2082
• Translation or Not:no
• Date of Publication:2012-10-01