کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581866 | 877848 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel modeling concept for evaluating the effects of cadmium and copper on heterotrophic growth and lysis rates in activated sludge process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A new modeling concept to evaluate the effects of cadmium and copper on heterotrophic growth rate constant (μH) and lysis rate constant (bH) in activated sludge was introduced. The oxygen uptake rate (OUR) was employed to measure the constants. The results indicated that the μH value decreased from 4.52 to 3.26 dâ1 or by 28% when 0.7 mg Lâ1 of cadmium was added. Contrarily the bH value increased from 0.31 to 0.35 dâ1 or by 11%. When adding 0.7 mg Lâ1 of copper, the μH value decreased to 2.80 dâ1 or by 38%. The bH value increased to 0.42 dâ1 or by 35%. After regression, the inhibitory effect was in a good agreement with non-competitive inhibition kinetic. The inhibition coefficient values for cadmium and copper were 1.82 and 1.21 mg Lâ1, respectively. The relation between the bH values and heavy metal concentrations agreed with exponential type well. The heavy metal would enhance bH value. Using these data, a new kinetic model was established and used to simulate the degree of inhibition. It was evident that not only the inhibitory effect on μH but also that the enhancement effect on bH should be considered when heavy metal presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 166, Issue 1, 15 July 2009, Pages 200-206
Journal: Journal of Hazardous Materials - Volume 166, Issue 1, 15 July 2009, Pages 200-206
نویسندگان
T.Y. Pai, S.C. Wang, H.M. Lo, C.F. Chiang, M.H. Liu, R.J. Chiou, W.Y. Chen, P.S. Hung, W.C. Liao, H.G. Leu,