کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
642798 | 884340 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of the performance of anaerobic fluidized bed bioreactors (AFBBRs) by a new starch based flocculant
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
In this study, laboratory-scale anaerobic fluidized bed bioreactors (AFBBRs) using granular activated carbon as bedding material were employed for treating a primary treated sewage effluent (PTSE) with or without refractory organic pollutants (ROPs). A new starch based flocculant (NSBF) combining a nature starch based cationic flocculants and trace nutrients was prepared and applied in the AFBBR. The impact of NSBF on the performance of AFBBR was mainly evaluated in terms of organic and nutrient removal and microbial activity. Membrane fouling based on critical flux was assessed when the bioreactor used as pretreatment for microfiltration. The results indicated that the addition of NSBF in AFBBR (NSBF-AFBBR) not only attained improved organic (9-10%) and nutrient removal (10-20%), higher biomass growth (3.0 gbiomass/LGAC) and net bed expansion (18 cm), but also doubled the critical flux (from 15 L/m3 h to 30 L/m3 h) in the microfiltration system. In addition, NSBF-AFBBR could retain 10% better DOC removal efficiency at different recirculation rates for treating PTSE with ROPs. When increasing organic loading rate from 21.6 kg COD/m3 d to 43.2 kg COD/m3 d, NSBF-AFBBR achieved comparatively constant organic removal of 55% whereas the efficiency in AFBBR alone decreased dramatically from 47% to 34%. Thus, NSBF could act as a performance enhancer for AFBBR.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 72, Issue 2, 20 April 2010, Pages 140-146
Journal: Separation and Purification Technology - Volume 72, Issue 2, 20 April 2010, Pages 140-146
نویسندگان
Wen Xing, Huu-Hao Ngo, Wenshan Guo, Zhenqi Wu, Tien Thanh Nguyen, Peter Cullum, Andrzej Listowski, Ning Yang,