کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
626255 | 1455445 | 2009 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Relationships between anaerobic consortia and removal efficiencies in an UASB reactor degrading 2,4 DCP
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to determine the interactions between anaerobic bacteria and the performance of the upflow anaerobic sludge blanket, UASB, chemical oxygen demand, COD, volatile fatty acid, VFA, and methane gas productions were determined. The variations of anaerobic microorganisms in the anaerobic granular sludge were counted under different operational conditions. The study was composed of two parts. In the first part, the numbers of methanogens and acedogens in the anaerobic granular sludge were counted at different COD removal efficiencies. The relationships between the numbers of methanogens, the methane gas production and VFA production were investigated. Most probable number (MPN) results showed that the mean number of total methanogens were between 15Ã104 and 29Ã1049 MPN/g at COD removal efficiencies of 33% and 82% in an UASB reactor treating 2,4 DCP at loading rates of 0.024-0.116 g/l.day, respectively. Decreases in methane gas percentage could be attributed to lowering in number of methanogens. The results showed that the COD removal efficiencies elevated from 33% to 82% while the number of total acedogens decreased from 120 cfu/ml to 8 cfu/ml as the 2,4 DCP loading rates lowered from 0.116 g/l.day to 0.024 g/l.day. There is a strong correlation between acedogen, methanogen bacteria numbers and reactor performances. In the second part, Methanobacterium bryantii, Methanobacterium formicicum, Methanobrevibacter smithii, Methanococcus voltae, Methanosarcina mazei, Methanosarcina acetivorans, Methanogenium bourgense, and Methanospirillum hungatei were identified in the reactor treating 2,4 DCP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 245, Issues 1â3, 15 September 2009, Pages 1-18
Journal: Desalination - Volume 245, Issues 1â3, 15 September 2009, Pages 1-18
نویسندگان
Delia Teresa Sponza, Canan Cıgal,