SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (6): 741-751.DOI: 10.1016/j.cjche.2016.12.001

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Fouling of WO3 nanoparticle-incorporated PSf membranes in ultrafiltration of landfill leachate and dairy a combined wastewaters:An investigation using model

Majid Peyravi, Mohsen Jahanshahi, Soodabeh Khalili   

  1. Nanoenvironment Research Group, Nanotechnology Institute, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
  • 收稿日期:2016-09-28 修回日期:2016-12-15 出版日期:2017-06-28 发布日期:2017-08-02
  • 通讯作者: Majid Peyravi,E-mail addresses:majidpeyravi@nit.ac.ir,majidpeyravi@gmail.com

Fouling of WO3 nanoparticle-incorporated PSf membranes in ultrafiltration of landfill leachate and dairy a combined wastewaters:An investigation using model

Majid Peyravi, Mohsen Jahanshahi, Soodabeh Khalili   

  1. Nanoenvironment Research Group, Nanotechnology Institute, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
  • Received:2016-09-28 Revised:2016-12-15 Online:2017-06-28 Published:2017-08-02

摘要: As fouling has always been a major drawback of membrane technology, qualitative and quantitative understanding of membrane fouling mechanisms therefore becomes vital in order to help push membrane separation technologies forward. In this study, firstly, self-cleaning Polysulfone (PSf) membranes were synthesized by incorporation of WO3 nanoparticles (0-2 wt%) and subsequent UV irradiation for efficient ultrafiltration (UF) of landfill leachate and dairy wastewater. The membrane surface properties were characterized by scanning electron microscopy (SEM) and contact angle analysis. It was found that UV-irradiated membranes exhibited higher percent COD removals due to the hydrophilicity and photocatalytic properties of nano-WO3. Subsequently, in order to analyze the fouling behavior of the membranes, a set of experimental data from cross-flow ultrafiltration of municipal landfill leachate and industrial dairy wastewater at 25℃ was obtained. A new model of membrane fouling was proposed based on a resistance in series concept and was fitted well with all experimental data sets. Almost all relative errors of prediction provided by the proposed model were less than 2.5%. In addition, it was revealed that this newly-developed model exhibited smooth transition between the common successive twostep pore blockage-cake filtration phenomena and thus eliminates the need to use separate equations for different mechanisms.

关键词: Fouling model, Leachate wastewater, Ultrafiltration, Whey wastewater, Chemical oxygen demand

Abstract: As fouling has always been a major drawback of membrane technology, qualitative and quantitative understanding of membrane fouling mechanisms therefore becomes vital in order to help push membrane separation technologies forward. In this study, firstly, self-cleaning Polysulfone (PSf) membranes were synthesized by incorporation of WO3 nanoparticles (0-2 wt%) and subsequent UV irradiation for efficient ultrafiltration (UF) of landfill leachate and dairy wastewater. The membrane surface properties were characterized by scanning electron microscopy (SEM) and contact angle analysis. It was found that UV-irradiated membranes exhibited higher percent COD removals due to the hydrophilicity and photocatalytic properties of nano-WO3. Subsequently, in order to analyze the fouling behavior of the membranes, a set of experimental data from cross-flow ultrafiltration of municipal landfill leachate and industrial dairy wastewater at 25℃ was obtained. A new model of membrane fouling was proposed based on a resistance in series concept and was fitted well with all experimental data sets. Almost all relative errors of prediction provided by the proposed model were less than 2.5%. In addition, it was revealed that this newly-developed model exhibited smooth transition between the common successive twostep pore blockage-cake filtration phenomena and thus eliminates the need to use separate equations for different mechanisms.

Key words: Fouling model, Leachate wastewater, Ultrafiltration, Whey wastewater, Chemical oxygen demand