کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
684611 889024 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Autotrophic denitrification using hydrogen generated from metallic iron corrosion
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Autotrophic denitrification using hydrogen generated from metallic iron corrosion
چکیده انگلیسی

Hydrogenotrophic denitrification was demonstrated using hydrogen generated from anoxic corrosion of metallic iron. For this purpose, a mixture of hydrogenated water and nitrate solution was used as reactor feed. A semi-batch reactor with nitrate loading of 2000 mg m−3 d−1 and hydraulic retention time (HRT) of 50 days produced effluent with nitrate concentration of 0.27 mg N L−1 (99% nitrate removal). A continuous flow reactor with nitrate loading of 28.9 mg m−3 d−1 and HRT of 15.6 days produced effluent with nitrate concentration of ∼0.025 mg N L−1 (95% nitrate removal). In both cases, the concentration of nitrate degradation by-products, viz., ammonia and nitrite, were below detection limits. The rate of denitrification in the reactors was controlled by hydrogen availability, and hence to operate such reactors at higher nitrate loading rates and/or lower HRT than reported in the present study, hydrogen concentration in the hydrogenated water must be significantly increased.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 100, Issue 18, September 2009, Pages 4077–4082
نویسندگان
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