کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6587285 | 456413 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced total nitrogen removal performance in a modified Orbal oxidation ditch system with internal nitrate recycle
ترجمه فارسی عنوان
عملکرد کلی حذف نیتروژن در یک سیستم گره اکسیداسیون اورانیوم اصلاح شده با بازیافت نیتروژن داخلی بهبود یافته است
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
A pilot-scale modified Orbal oxidation ditch with internal recycle of the nitrified liquor was developed to significantly enhance total nitrogen (TN) removal through simultaneous nitrification/denitrification (SND) coupled with pre-denitrification under the aerated-anoxic condition. Long-term operational results showed that the highest TN removal efficiency was achieved at very low dissolved oxygen (DO) of 0.15-0.25Â mg/L and oxidation-reduction potential (ORP) of 10-40Â mv within the outer channel. Appropriate internal recycle ratio played a significant role for increasing nitrates reduction within the outer channel, however, excessively high recycle flow deteriorated nitrogen removal instead because of diluted carbon source. At recycle ratio of 9.4, TN removal efficiency further increased to about 87% at optimal DO and pre-denitrification was responsible for TN removal improvement according to nitrogen mass balances. Molecular biology analysis revealed the correlation between variations in nitrogen removal and changes in bacterial community composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 228, 15 July 2013, Pages 124-131
Journal: Chemical Engineering Journal - Volume 228, 15 July 2013, Pages 124-131
نویسندگان
Xin Zhou, Yunping Han, Xuesong Guo,