کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
625838 1455438 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance of two combined anaerobic–aerobic biofilters packed with clay or plastic media for the treatment of highly concentrated effluent
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Performance of two combined anaerobic–aerobic biofilters packed with clay or plastic media for the treatment of highly concentrated effluent
چکیده انگلیسی

Biological treatment of high-strength carbon and nitrogen synthetic wastewater by two combined anaerobic–aerobic biofiltration systems packed with clay (system 1) or plastic media (system 2) has been studied for 143 days. Four phases of operating conditions were carried out with an influent COD and TKN concentrations varied from 2595 to 5969 mg/L and 510 to 1866 mg/L, respectively. Both systems exhibited excellent COD removal performance and the average removal efficiencies were superior to 90% for a loading of 2 to 4 kg COD/m3/d. The BOD5 average removal during the four operating phases varied from 91 to 98%. Total nitrogen removal occurred in the aerobic stage showing 60% and 77% of elimination obtained for aerobic filters of systems 1 and 2, respectively. Nitrogen removal was related to many factors such as nitrification/denitrification, bacterial assimilation and NH3-stripping. The aerobic filter packed with plastic media produced less nitrates than the other filter. This may due to an enhancement of the denitrification or to the inhibition of nitrobacter by free NH3. Effluent nitrite concentrations confirmed the possibility of NH3-inhibition. Phosphorus removal was also at acceptable level for both systems with yields varied from 50% (system 1) to 70% (system 2).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 253, Issues 1–3, April 2010, Pages 141–146
نویسندگان
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