کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4489381 1317139 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen removal using nitrifying biofilm growth and denitrifying suspended growth in a biofilm airlift suspension reactor coupled with a chemostat
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Nitrogen removal using nitrifying biofilm growth and denitrifying suspended growth in a biofilm airlift suspension reactor coupled with a chemostat
چکیده انگلیسی

A nitrifying biofilm airlift suspension reactor (with nitrifiers growing in biofilms) was coupled with a denitrifying chemostat (with denitrifiers growing in suspension) for integrated nitrogen removal. Initially the process was run in post-denitrification setup, during which nitrification and denitrification went via nitrate. Later recirculation between both reactors was applied (pre-denitrification setup), resulting in circulation of the suspended denitrifiers between the two reactors. The setup was suitable for nitrification and denitrification: 75% total nitrogen removal efficiency was obtained at an aerobic ammonia load of 5 kgN m−3 d−1. In the pre-denitrification setup nitrification and denitrification mainly occurred with nitrite as an intermediate. Probably the nitrite oxidisers and reducers competed for nitrite, which competition was won by the nitrite reducers. A low average COD/N-ratio of 3.0 gCOD gN−1 was obtained, in accordance with the “nitrite route”.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 32, Issue 7, July 1998, Pages 2009–2018
نویسندگان
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