کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7065926 1459877 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of carrier media physical properties on start-up of moving attached growth systems
ترجمه فارسی عنوان
تأثیر خواص فیزیکی رسانه حامل در راه اندازی سیستم های متحرک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Five carrier media with different shapes (spherical and cylindrical), sizes, voidage and protected surface areas (112-610 m2/m3) were studied in a pilot scale moving bed biofilm reactor (MBBR). This study aimed at assessing start-up duration using biofilm formation rates. Results indicated that the spherical media required shorter periods to achieve stable biofilm formation rates associated with chemical oxygen demand (COD) (15-17 days), compared to cylindrical high surface area media (23-24 days). Protected surface area presented weaker correlations with the biofilm formation rate for COD (R2 = 0.83) and ammonia removal (R2 = 0.76). However, good correlations were observed with a combination of the media physical factors: dimensionality (Di), voidage (Voi), and hydraulic efficiency (HE) strongly correlated with biofilm formation rates for heterotrophic (R2 = 0.95) and nitrifying bacteria (R2 = 0.92). This study proposes that the media physical properties can contribute to shortening start-up, contributing to improved removal rates and fast commissioning of MBBRs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 266, October 2018, Pages 463-471
نویسندگان
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