کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
682315 888982 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Response of nitrifying bacterial communities to the increased thiocyanate concentration in pre-denitrification process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Response of nitrifying bacterial communities to the increased thiocyanate concentration in pre-denitrification process
چکیده انگلیسی

Changes in process performance and the nitrifying bacterial community associated with an increase of thiocyanate (SCN−) loading were investigated in a pre-denitrification process treating industrial wastewater. The increased SCN− loading led to the concentration of total nitrogen (TN) in the final effluent, but increasing the internal recycling ratio as an operation parameter from 2 to 5 resulted in a 21% increase in TN removal efficiency. In the aerobic reactor, we found that the Nitrosomonas europaea lineage was the predominant ammonia oxidizing bacteria (AOB) and the percentages of the AOB population within the total bacteria increased from about 4.0% to 17% with increased SCN− concentration. The increase of nitrite loading seemed to change the balance between Nitrospira and Nitrobacter, resulting in the high dominance of Nitrospira over Nitrobacter. Meanwhile, a Thiobacillus thioparus was suggested to be the main microorganism responsible for the SCN− biodegradation observed in the system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 102, Issue 2, January 2011, Pages 913–922
نویسندگان
, , , , , ,