کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
626929 1455456 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fractionation of organic matters in sludge rejected by NF membrane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Fractionation of organic matters in sludge rejected by NF membrane
چکیده انگلیسی

Nanofiltration membrane bioreactor (NF-MBR) was proposed to provide quality effluent free of virus and most large organic substances. The dissolved organic matter (DOM) in soluble microbial products (SMP), loosely bound extracellular polymeric substances (LBEPS) and tightly bound extracellular polymeric substances (TBEPS) of wastewater sludge before and filtered through nanofiltration membrane were fractioned using size exclusion chromatography, characterized with ultraviolet absorbance at 230, 254 and 280 nm, dissolved oganic carbon (DOC) content, and excitation-emission-matrix (EEM) spectra. Except for long-chain organic acids, the membrane rejected most organic matters in SMP and LBEPS fractions. However, the membrane failed to reject fluorescent DOM from TBEPS at molecular weight of 3000–7000 Da. The content of TBEPS in the mixed liquor affected significantly the effluent quality in NF-MBR application.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 234, Issues 1–3, 31 December 2008, Pages 386-392