کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4753331 | 1416555 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inhibition kinetics of nitritation and half-nitritation of old landfill leachate in a membrane bioreactor
ترجمه فارسی عنوان
سینتیک بازدارندگی از نیترات و نیمی از نیتروژن سدیم زباله های قدیمی در یک بیوراکتور غشایی
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کلمات کلیدی
سیلاب زباله قدیمی بیوراکتور غشایی، نیتروژن، نیمه نیتروژن، جنبش مهار
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی
Nitritation can be used as a pretreatment for anaerobic ammonia oxidation (anammox). Various control strategies for nitritation and half-nitritation of old landfill leachate in a membrane bioreactor were investigated in this study and the inhibition kinetics of substrate, product and old landfill leachate on nitritation were analyzed via batch tests. The results demonstrated that old landfill leachate nitritation in the membrane bioreactor can be achieved by adjusting the influent loading and dissolved oxygen (DO). From days 105-126 of the observation period, the average effluent concentration was 871.3Â mg/L and the accumulation rate of NO2ââN was 97.2%. Half-nitritation was realized quickly by adjusting hydraulic retention time and DO. A low-DO control strategy appeared to best facilitate long-term and stable operation. Nitritation inhibition kinetic experiments showed that the inhibition of old landfill leachate was stronger than that of the substrate (NH4+âN) or product (NO2ââN). The ammonia oxidation rate dropped by 22.2% when the concentration of old landfill leachate (calculated in chemical oxygen demand) was 1600.2Â mg/L; further, when only free ammonia or free nitrous acid were used as a single inhibition factor, the ammonia oxidation rate dropped by 4.7-6.5% or 14.5-15.9%, respectively. Haldane, Aiba, and a revised inhibition kinetic model were adopted to separately fit the experimental data. The R2 correlation coefficient values for these three models were 0.982, 0.996, and 0.992, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Bioscience and Bioengineering - Volume 123, Issue 4, April 2017, Pages 482-488
Journal: Journal of Bioscience and Bioengineering - Volume 123, Issue 4, April 2017, Pages 482-488
نویسندگان
Yun Li, Zhaozhao Wang, Jun Li, Jia Wei, Yanzhuo Zhang, Baihang Zhao,