Characteristics and simulation of soluble microbial products in membrane bioreactors coupled with moving carriers (MBR-MC)

被引:3
|
作者
Chen, Lin [1 ]
Cao, Chuqing [2 ]
机构
[1] Harbin Inst Technol, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150090, Peoples R China
关键词
Membrane bioreactor; Moving carrier; Soluble microbial products; Characteristics; Response surface methodology; FLUORESCENCE;
D O I
10.5004/dwt.2012.2519
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study, three lab-scaled membrane bioreactors (MBRs) coupled with moving carriers (MC) were operated under different sludge retention times (SRTs = 10, 30 and 50 d) for the treatment of synthetic wastewater. The characteristics of soluble microbial products (SMP) at each SRT were examined. The concentration of SMP in the supernatant firstly decreased from around 31.5 to 24.3 mg l(-1) when the SRT was increased from 10 to 30 d, and then showed a little increase as the SRT was further extended to 50 d. The profile of the molecular weight distribution (MWD) showed that the SMP had a wide spectrum of molecular weight. The dominant fraction with molecular mass higher than 10 kDa increased from 55.9% to 63.8% with the increase of the SRT from 10 to 50 d, while the two other fractions (1 kDa <MW <10 kDa and MW<1 kDa) subtly decreased. The excitation-emission matrix fluorescence spectroscopy (EEM) revealed that the SMP had three similar peak locations regardless of the SRT and the quenching effect of humic-like substance on protein should be considered. Response surface methodology was used to evaluate the effects of SRT, hydraulic retention time (HRT), temperature and aeration rate on the SMP production. The optimal parameters were obtained at an SRT of 33 d, an HRT of 10 h, a temperature of 19 degrees C and an aeration rate of 1.5 m(3) h(-1), giving rise to an SMP of 23.9 mg l(-1). These results may serve as a useful guide for optimizing the operational parameters of the MBR-MC system to minimize the SMP production, and accordingly, improve the permeate quality and alleviate membrane fouling.
引用
收藏
页码:45 / 55
页数:11
相关论文
共 34 条
  • [1] Modelling the production and degradation of soluble microbial products (SMP) in membrane bioreactors (MBR)
    Jiang, Tao
    Myngheer, Silvie
    De Pauw, Dirk J. W.
    Spanjers, Henri
    Nopens, Ingmar
    Kennedy, Maria D.
    Amy, Gary
    Vanrolleghem, Peter A.
    [J]. WATER RESEARCH, 2008, 42 (20) : 4955 - 4964
  • [2] Identification of biofoulant of membrane bioreactors in soluble microbial products
    Okamura, Daisuke
    Mori, Yoshihiko
    Hashimoto, Tomotaka
    Hori, Katsutoshi
    [J]. WATER RESEARCH, 2009, 43 (17) : 4356 - 4362
  • [3] Fouling propensity of soluble microbial products in membrane bioreactors
    Khelifi, Olfa
    Kodama, Toyo
    Bouallagui, Hassib
    Hamdi, Moktar
    [J]. JOURNAL OF BIOTECHNOLOGY, 2010, 150 : S289 - S289
  • [4] Retention of soluble microbial products in submerged membrane bioreactors
    Wang, Xiao-Mao
    Waite, T. David
    [J]. DESALINATION AND WATER TREATMENT, 2009, 6 (1-3) : 131 - 137
  • [5] Soluble microbial products in membrane bioreactors in the presence of ZnO nanoparticles
    Mei, Xiaojie
    Wang, Zhiwei
    Zheng, Xiang
    Huang, Fei
    Ma, Jinxing
    Tang, Jixu
    Wu, Zhichao
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2014, 451 : 169 - 176
  • [6] Characterization of Soluble Microbial Products and Their Fouling Impacts in Membrane Bioreactors
    Jiang, Tao
    Kennedy, Maria D.
    De Schepper, Veerle
    Nam, Seong-Nam
    Nopens, Ingmar
    Vanrolleghem, Peter A.
    Amy, Gary
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2010, 44 (17) : 6642 - 6648
  • [7] Identification of the change of soluble microbial products on membrane fouling in membrane bioreactor (MBR)
    Yao, Meng
    Ladewig, Bradley
    Zhang, Kaisong
    [J]. DESALINATION, 2011, 278 (1-3) : 126 - 131
  • [8] A systematic study of soluble microbial products and their fouling impacts in membrane bioreactors
    Tian, Yu
    Chen, Lin
    Zhang, Sai
    Zhang, Shuai
    [J]. CHEMICAL ENGINEERING JOURNAL, 2011, 168 (03) : 1093 - 1102
  • [9] Characteristics and behaviors of soluble microbial products in sequencing batch membrane bioreactors at various sludge retention times
    Dong, Bin
    Jiang, Shuangying
    [J]. DESALINATION, 2009, 243 (1-3) : 240 - 250
  • [10] Changes in characteristics of soluble microbial products in membrane bioreactors associated with different solid retention times: Relation to membrane fouling
    Kimura, Katsuki
    Naruse, Takuro
    Watanabe, Yoshimasa
    [J]. WATER RESEARCH, 2009, 43 (04) : 1033 - 1039