کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7079036 | 1459989 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and composition of biofilm communities in a moving bed biofilm reactor for nitritation-anammox at low temperatures
ترجمه فارسی عنوان
ساختار و ترکیب جوامع بیوفیلم در یک رآکتور بیوفیلم در حال حرکت برای نیتروژن-آناموکس در دماهای پایین
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
It is a challenge to apply anaerobic ammonium oxidation (anammox) for nitrogen removal from wastewater at low temperatures. Maintenance of anammox- and aerobic ammonia oxidizing bacteria (AOB) and suppression of nitrite oxidizing bacteria (NOB) are key issues. In this work, a nitritation-anammox moving bed biofilm pilot reactor was operated at 19-10 °C for 300 d. Nitrogen removal was decreasing, but stable, at 19-13 °C. At 10 °C removal became unstable. Quantitative PCR, fluorescence in situ hybridization and gene sequencing showed that no major microbial community changes were observed with decreased temperature. Anammox bacteria dominated the biofilm (0.9-1.2 Ã 1014 16S rRNA copies mâ2). Most anammox bacteria were similar to Brocadia sp. 40, but another smaller Brocadia population was present near the biofilm-water interface, where also the AOB community (Nitrosomonas) was concentrated in thin layers (1.8-5.3 Ã 1012 amoA copies mâ2). NOB (Nitrobacter, Nitrospira) were always present at low concentrations (<1.3 Ã 1011 16S rRNA copies mâ2).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 154, February 2014, Pages 267-273
Journal: Bioresource Technology - Volume 154, February 2014, Pages 267-273
نویسندگان
Frank Persson, Razia Sultana, Marco Suarez, Malte Hermansson, Elzbieta Plaza, Britt-Marie Wilén,