膜科学与技术

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Studies on the effective and direct separation of simulated plam oily wastewater by a novel modified PVDF hollow fiber membrane

Authors： NIE Shichao1, ZHOU Xiaoji1,2, LIU Kunpeng1, SHEN Shusu1,2, YANG Jingjing1,2, BAI Renbi1,2*

Units： 1Suzhou University of Science and Technology, Center for Separation and Purification Materials &Technologies, 2Jiangsu Collabrative Innovation Center of Technology and Material of Water Treatment, No. 1 Kerui Road, Suzhou, 215009

KeyWords： Modified PVDF hollow fiber membrane; Simulated palm oily wastewater; Oily-water separation; Operation conditions; Running effect.

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(5):16-23

Abstract：

Simulated palm oily wastewater was directly separated by a modified hollow fiber membrane with both hydrophilic and oleophobic surface properties. This research realized a low energy cost of the hollow fiber membrane who is suitable to work under a relative low operation pressure (0.08-0.10 MPa). A better results may be contained when the backflow was 1.5 times of the initial permeate flux. By increasing the feed temperature, the permeate flux was increased and the flux decay rate was decreased. It was found that 0.1wt% mixture of NaOH and SDS had superior effect for irreversible fouling 45 ℃. The modified hollow fiber membranes demonstrated an excellent performance in the separation of simulated plam oily wastewater from the low feed concentration of 50 mg•L-1 to an even high feed concentration of 1×105 mg•L-1, and the TOC values of all the pemeate were below 5 mg•L-1. The flux decay rate after 2 hours permeation were around 21.2% to 59.0%. Almost 100% flux recovery rate was achieved for the rinses. The polymer membranes are hard to be widely and directly applied into the separation of oily wastewater, because the membranes can be easily polluted by oils. However, such obstacles can be overcome by using the novel modified PVDF hollow fiber membrane.

Funds：

国家自然科学基金项目（51478282）、苏州市分离净化材料与技术重点实验室（SZS201512）以及苏州市水利水务科研课题（2015-7-1）

AuthorIntro：

作者简介：聂士超（1989-），男，辽宁葫芦岛市，硕士，就读于苏州科技学院，主要从事中空纤维膜处理含油水的应用研究，师承白仁碧教授。*通讯作者，E-mail：ceebairb@live.com

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