کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
680739 1459990 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance of a haloalkaliphilic bioreactor under different NO3-/SO42- ratios
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Performance of a haloalkaliphilic bioreactor under different NO3-/SO42- ratios
چکیده انگلیسی


• Haloalkaliphilic microorganisms were used to reduce sulfate and nitrate.
• Sulfide concentration reached up to 703 mg/l.
• There was no sulfide inhibition to haloalkaliphilic microorganisms.
• Bacterial community of haloalkaliphilic bioreactor was studied.

Effects of NO3-/SO42- ratio on denitrification and sulfate removal efficiency were investigated in model experiments applying haloalkaliphilic bioreactor. The reduction of both substrates performed well at different NO3-/SO42- ratios ranging from 17.6 to l.5. The removal rates of nitrate and sulfate were 6 and 1.39 kg m−3 d−1, respectively, at NO3-/SO42- ratio 3.0, while sulfide concentration reached up to 703 g m−3. The major sulfate-reducing and denitrifying bacteria were Desulfonatronovibrio sp. and Halomonas campisalis  , respectively. Decrease in NO3-/SO42- ratio led to obvious changes in bacterial community. Although the sulfate reducers became dominant, the population of denitrifying ones also increased as it was demonstrated by analysis of PCR-amplified 16S rDNA fragments, which suggested that SRB and DB coexisted well in bioreactor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 153, February 2014, Pages 216–222
نویسندگان
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