کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4408109 1618831 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Integrated fixed-biofilm activated sludge reactor as a powerful tool to enrich anammox biofilm and granular sludge
ترجمه فارسی عنوان
رآکتور لجن فعال بیوفیلم ثابت به عنوان یک ابزار قدرتمند برای غنی سازی بیوفیلم آناموکس و لجن گرانول
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Nitritation–anammox process was obtained in a pilot-scale IFAS reactor.
• Nitrogen loading rate of 1.2 kg m−3 d−1 was achieved with the removal efficiency of 80%.
• Anammox bacteria was attached grew and enriched on the surface of the carrier.
• Anammox granular sludge was gradually obtained due to the detachment of biofilm.

A pilot-scale activated sludge bioreactor was filled with immobile carrier to treat high ammonium wastewater. Autotrophic nitrogen elimination occurred rapidly by inoculating nitrifying activated sludge and anammox biofilm. As the ammonium loading rate increased, nitrogen removal rate of 1.2 kg N m−3 d−1 was obtained with the removal efficiency of 80%. Activated sludge diameter distribution profiles presented two peak values, indicating simultaneous existence of flocculent and granular sludge. Red granular sludge was observed in the reactor. Furthermore, the results of morphological and molecular analysis showed that the characteristics of granular sludge were similar to that of biofilm, while much different from the flocculent sludge. It was assumed granular sludge was formed through the continuous growth and detachment of anammox biofilm. The mechanism of granular sludge formation was discussed and the procedure model was proposed. According to the experimental results, the integrated fixed-biofilm activated sludge reactor provided an alternative to nitrogen removal based on anammox.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 140, December 2015, Pages 114–118
نویسندگان
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