کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10233195 | 42734 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance of anaerobic baffled reactor (ABR) treating synthetic wastewater containing p-nitrophenol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the effect of increasing p-nitrophenol (PNP) concentrations on the performance of anaerobic baffled reactor (ABR) (chemical oxygen demand (COD), removals, volatile fatty acid (VFA), p-aminophenol (PAP) and methane gas productions) was investigated through 240 days. The PNP concentrations were raised to 700 from 10Â mg/L corresponding to PNP loading rates of 0.97 and 67.9Â g/m3 day. The PNP and COD removal efficiencies were 99 and 90% at PNP loading rates as high as 33.9Â g/m3 day, respectively, through the acclimation of anaerobic granular sludge. After this loading rate, the removal efficiencies decreased to 79%. The COD removal efficiencies were high in compartment 1 (EÂ =Â 78-93%) while a small amount of COD removal was achieved in compartments 2 and 3. The PNP removal efficiencies were approximately 90% in all PNP loading rates except for loading rate of 0.97Â g/m3 day. The maximum PNP removal efficiency was measured as 99% at a loading rate of 8.32Â g/m3 day. The optimum PNP loading rate for maximum COD, PNP removals and methane yield was 8.32Â g/m3 day. The total, methane gas productions and methane percentages were approximately 2160-2400Â mL/day and 950-1250Â mL/day and 44-52% for the PNP loading rates varying between 4.36 and 33.9Â g/m3 day, respectively. For PNP loading rates varying between 33.9 and 67.9Â g/m3 day, the total, methane gas productions and methane percentages were approximately 2160 and 960Â mL/day and 44%, respectively. The highest total volatile fatty acid (TVFA) concentrations were found in the first compartment with fluctuated values varied between 50 and 200Â mg/L indicating the acidogenesis. p-Aminophenol was found as the main intermediate through anaerobic degradation of PNP which later was broken down to phenol and ammonia.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Enzyme and Microbial Technology - Volume 36, Issue 7, 16 May 2005, Pages 888-895
Journal: Enzyme and Microbial Technology - Volume 36, Issue 7, 16 May 2005, Pages 888-895
نویسندگان
Ãzlem Selçuk KuÅçu, Delia Teresa Sponza,