کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
681685 888959 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microbial community developments and biomass characteristics in membrane bioreactors under different organic loadings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Microbial community developments and biomass characteristics in membrane bioreactors under different organic loadings
چکیده انگلیسی

Microbial community developments and biomass characteristics (concentration, particle size, extracellular polymeric substances (EPS), and membrane fouling propensity) were compared when three MBRs were fed with the synthetic wastewater at different organic loadings. Results showed that the bacterial communities dynamically shifted in different ways and the EPS displayed dissimilar profiles under various organic loadings, which were associated with the ratios of food to microorganism and dissolved oxygen levels in the MBRs. The membrane fouling tendency of biomass in the low-loading MBR (0.57 g COD/L day) was insignificantly different from that in the medium-loading MBR (1.14 g COD/L day), which was apparently lower than that in the high-loading MBR (2.28 g COD/L day). The membrane fouling propensity of biomass was strongly correlated with their bound EPS contents, indicating cake layer fouling (i.e., deposition of microbial flocs) was predominant in membrane fouling at a high flux of 30 L/m2 h.


► Bacterial community shifted in different ways under various organic loadings.
► Different EPS properties were observed under various organic loadings.
► Dissolved oxygen level influenced EPS production.
► Serious membrane fouling tendency occurred in the high-organic-loading MBR.
► Specific fouling resistance was correlated with bound EPS and protein contents.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 102, Issue 13, July 2011, Pages 6808–6814
نویسندگان
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