SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (5): 651-657.DOI: 10.1016/j.cjche.2016.01.002

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Application of response surface methodology to the chemical cleaning process of ultrafiltration membrane

Caihong Wang1,2, AishuWei3, HaoWu4, Fangshu Qu1, Weixiong Chen2, Heng Liang1, Guibai Li1   

  1. 1 State Key Laboratory of UrbanWater Resource and Environment(SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China;
    2 The Architecture Design and Research Institute of Guangdong Province, Guangzhou 510100, China;
    3 China Urban Construction Design & Research Institute, Beijing 100120, China;
    4 School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
  • Received:2015-07-19 Revised:2015-11-22 Online:2016-06-14 Published:2016-05-28
  • Contact: Heng Liang
  • Supported by:

    Supported by State Key Laboratory of Urban Water Resource and Environment (2016DX01), the Fundamental Research Funds for the Central University (NSRIF.2014096) and Science and Technology Planning Project of Chancheng District (2013A1044).

Application of response surface methodology to the chemical cleaning process of ultrafiltration membrane

Caihong Wang1,2, AishuWei3, HaoWu4, Fangshu Qu1, Weixiong Chen2, Heng Liang1, Guibai Li1   

  1. 1 State Key Laboratory of UrbanWater Resource and Environment(SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China;
    2 The Architecture Design and Research Institute of Guangdong Province, Guangzhou 510100, China;
    3 China Urban Construction Design & Research Institute, Beijing 100120, China;
    4 School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
  • 通讯作者: Heng Liang
  • 基金资助:

    Supported by State Key Laboratory of Urban Water Resource and Environment (2016DX01), the Fundamental Research Funds for the Central University (NSRIF.2014096) and Science and Technology Planning Project of Chancheng District (2013A1044).

Abstract: A numericalmodelwas established to predict and optimise the chemical cleaning process of Polyvinylidene Fluoride (PVDF) Ultrafiltration (UF) membraneswith the results fromthe experiment that applied the Response SurfaceMethod (RSM) and Central Composite Design (CCD). The factors considered in the experimental designwere sodium hydroxide (NaOH) concentration, sodium hypochlorite concentration (NaClO), citric acid concentration and cleaning duration. The interactions between the factors were investigated with the numerical model. Humic acid (20 mg·L-1)was used as themodel foulant, and chemical enhanced backflush (CEB) was employed to simulate the chemical cleaning process. The concentrations of sodium hydroxide, sodium hypochlorite, citric acid and cleaning duration tested during the experiments were in the range of 0.1%-0.3%, 100-300 mg·L-1, 1%-3% and 0.5-1.5 h, respectively. Among the variables, the sodium hypochlorite concentration and the cleaning duration showed a positive relationship involving the increased efficiency of the chemical cleaning. The chemical cleaning efficiency was hardly improved with increasing concentrations of sodium hydroxide. However, the data was sharply decreased when at a low level of sodium hydroxide concentration. In total, 54 sets of cleaning schemes with 80% to 100% cleaning efficiency were observed with the RSM model after calibration.

Key words: Ultrafiltration, Response surface methodology, Chemical cleaning, Water treatment

摘要: A numericalmodelwas established to predict and optimise the chemical cleaning process of Polyvinylidene Fluoride (PVDF) Ultrafiltration (UF) membraneswith the results fromthe experiment that applied the Response SurfaceMethod (RSM) and Central Composite Design (CCD). The factors considered in the experimental designwere sodium hydroxide (NaOH) concentration, sodium hypochlorite concentration (NaClO), citric acid concentration and cleaning duration. The interactions between the factors were investigated with the numerical model. Humic acid (20 mg·L-1)was used as themodel foulant, and chemical enhanced backflush (CEB) was employed to simulate the chemical cleaning process. The concentrations of sodium hydroxide, sodium hypochlorite, citric acid and cleaning duration tested during the experiments were in the range of 0.1%-0.3%, 100-300 mg·L-1, 1%-3% and 0.5-1.5 h, respectively. Among the variables, the sodium hypochlorite concentration and the cleaning duration showed a positive relationship involving the increased efficiency of the chemical cleaning. The chemical cleaning efficiency was hardly improved with increasing concentrations of sodium hydroxide. However, the data was sharply decreased when at a low level of sodium hydroxide concentration. In total, 54 sets of cleaning schemes with 80% to 100% cleaning efficiency were observed with the RSM model after calibration.

关键词: Ultrafiltration, Response surface methodology, Chemical cleaning, Water treatment