کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7065904 1459877 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Selectivity control of nitrite and nitrate with the reaction of S0 and achieved nitrite accumulation in the sulfur autotrophic denitrification process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Selectivity control of nitrite and nitrate with the reaction of S0 and achieved nitrite accumulation in the sulfur autotrophic denitrification process
چکیده انگلیسی
The characteristics of reaction between S0 and NO2−-N or NO3−-N in the sulfur autotrophic denitrification (SADN) process were studied using S0 as an electron donor and NO2−-N and NO3−-N as electron acceptors. The effect of changes in pH and temperature on the processes of NO2−-N and NO3−-N reduction were also studied to identify the optimum control parameters for strengthening the preference of S0 on NO3−-N; thus, achieving the efficient accumulation of NO2−-N. The results showed that the affinity of S0 for NO3−-N was considerably higher than that for NO2−-N. The optimum pH values for the reductions of NO2−-N and NO3−-N were 7.0 and 8.5, respectively, and both optimum temperatures were 35 °C. By controlling different pH, the NO3−-N conversion efficiency reached 90%, at which time the accumulation of NO2−-N was more than 95%. Microbial community analysis showed that Thiobacillus, Sulfurimonas, and Thioahalobacter were the main genera in the S0-SADN process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 266, October 2018, Pages 211-219
نویسندگان
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