کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
584908 877900 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Critical appraisal of respirometric methods for metal inhibition on activated sludge
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Critical appraisal of respirometric methods for metal inhibition on activated sludge
چکیده انگلیسی
This paper evaluates the merit of oxygen uptake rate measurements for the assessment of metal inhibition on activated sludge. For this purpose, experiments are conducted to calculate EC50 levels of nickel and hexavalent chromium using the ISO 8192 procedure, yielding results that are highly variable and difficult to correlate, depending on the type of substrate and the initial food to microorganism ratio. Similar experiments based on continuous respirometric measurements to give the entire oxygen uptake rate profile provide a much better insight on the impact of inhibition on different biochemical processes taking place in the reactor. The results indicate that percent reduction of the amount of dissolved oxygen utilized after an appropriate reaction time is a much better index for the assessment of the inhibitory effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 139, Issue 2, 10 January 2007, Pages 332-339
نویسندگان
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