کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8096549 1522068 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance of moving bed biofilm reactor using effective microorganisms
ترجمه فارسی عنوان
اجرای رآکتور بیوفیلم در حال حرکت با استفاده از میکروارگانیسم های موثر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
This work shows the feasibility of using effective microorganisms (EM) to improve the performance of a moving bed biofilm reactor (MBBR) in treating primary settled wastewater. Two MBBR systems were compared, one inoculated with activated sludge only, and the other inoculated with a mixture of activated sludge and EM, under steady-state conditions, and under organic and hydraulic shock loadings. Results after a startup period showed that carriers in MBBR inoculated with activated sludge had only a thicker biofilm compared to MBBR inoculated with a mixture of activated sludge and EM. When compared to MBBR inoculated with activated sludge only, adding EM to the activated sludge was found to improve slightly the removal of particulate chemical oxygen demand (pCOD) and total ammonia nitrogen (TAN), while no improvement in the removal of soluble chemical oxygen demand (sCOD) was achieved. The average removal efficiencies for chemical oxygen demand (COD), sCOD, pCOD, and TAN were found to be 76.71%, 81.87%, 68.13%, and 45.92%, respectively in MBBR inoculated with activated sludge only for a period of 30 days; while those for MBBR inoculated with a mixture of activated sludge and EM were found to be 67.79%, 61.12%, 76.26%, and 56.97%, respectively, during the same period. Both MBBR systems were affected by shock loadings. Performance of MBBR inoculated with activated sludge only was much better than that for MBBR inoculated with a mixture of activated sludge and EM under both organic and hydraulic shock loadings with respect to removal of COD and TAN. MBBR inoculated with activated sludge only took much less time to reach steady-state conditions after the removal of both organic and hydraulic shock loadings when compared to MBBR inoculated with a mixture of activated sludge and EM. MBBR inoculated with a mixture of activated sludge and EM was able to reach steady-state conditions 5 h from removal of organic shock loading, while it was not able to reach original conditions after removal of hydraulic shock loading.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 185, 1 June 2018, Pages 723-731
نویسندگان
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