کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7072381 1459940 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Activated sludge mass reduction and biodegradability of the endogenous residues by digestion under different aerobic to anaerobic conditions: Comparison and modeling
ترجمه فارسی عنوان
کاهش توده لجن فعال و تجزیه زیستی از باقی مانده های اندوژن توسط هضم تحت شرایط مختلف هوازی تا بی هوازی: مقایسه و مدل سازی
کلمات کلیدی
هضم، بقایای اندوژن، هوای متناوب، مدل سازی، به حداقل رساندن لجن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
This study was performed to identify suitable conditions for the in-situ reduction of excess sludge production by intercalated digesters in recycle-activated sludge (RAS) flow. The objective was to compare and model biological sludge mass reduction and the biodegradation of endogenous residues (XP) by digestion under hypoxic, aerobic, anaerobic, and five intermittent-aeration conditions. A mathematical model based on the heterotrophic endogenous decay constant (bH) and including the biodegradation of XP was used to fit the long-term data from the digesters to identify and estimate the parameters. Both the bH constant (0.02-0.05 d−1) and the endogenous residue biodegradation constant (bP, 0.001-0.004 d−1) were determined across the different mediums. The digesters with intermittent aeration cycles of 12 h-12 h and 5 min-3 h (ON/OFF) were the fastest, compared to the aerobic reactor. The study provides a basis for rating RAS-digester volumes to avoid the accumulation of XP in aeration tanks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 203, March 2016, Pages 32-41
نویسندگان
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