کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6585801 | 456382 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of dissolved organic matter in the anoxic-oxic-settling-anaerobic sludge reduction process
ترجمه فارسی عنوان
خصوصیات مواد آلی محلول در فرآیند کاهش لجن بی هوازی - اکسید - محلول - بی هوازی
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کلمات کلیدی
کاهش لجن، ماده آلی حل شده، تصفیه فاضلاب، تجزیه و تحلیل عامل، وزن مولکولی، فرایند انعقاد زیست محیطی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Three-dimensional excitation-emission matrix (EEM) fluorescence spectroscopy and gel permeation chromatography (GPC) analysis were employed to investigate the distribution and transformation of dissolved organic matter (DOM) in the anoxic-oxic-settling-anaerobic (AÂ +Â OSA) process for sludge reduction. The AÂ +Â OSA process showed a good performance in nitrogen and organic pollutants removal efficiency, and reduced sludge yield by 32% under a sludge retention time of 6Â h in the anaerobic sludge holding tank (SHT). Parallel factor analysis was used to assess DOM composition from EEM spectra and three fluorescent components were identified: two humic-like components and one protein-like component. In the AÂ +Â OSA process, the humic-like components were difficult to degraded, while the protein-like component was easily hydrolyzed and adsorbed under anoxic conditions. The fluorescence intensities of the humic-like and protein-like components were both strengthened in the SHT owing to sludge decay under the anaerobic condition. GPC analysis of the AÂ +Â OSA system showed that the majority of molecules in the influent wastewater with molecular weight (MW) in the range of >250 and 30-50Â kDa were mainly transformed into small molecules with MW in the range of 30-250 and <0.5Â kDa in the effluent by microorganisms. The DOM in the SHT effluent demonstrated a broader MW distribution and higher intensity than that in the SHT influent, and the percentage of MW between 10 and 30Â kDa in the SHT effluent were significantly increased owing to cell lysis and decay in the SHT.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 259, 1 January 2015, Pages 357-363
Journal: Chemical Engineering Journal - Volume 259, 1 January 2015, Pages 357-363
نویسندگان
Zhen Zhou, Weimin Qiao, Can Xing, Chunying Wang, Lu-Man Jiang, Yuting Gu, Luochun Wang,