کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4997557 1459911 2017 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous removal of nitrate and chromate in groundwater by a spiral fiber based biofilm reactor
ترجمه فارسی عنوان
حذف همزمان نیترات و کرومات در آب های زیرزمینی توسط یک راکتور بیوفیلم مبتنی بر فیبر مارپیچی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
A spiral fiber based biofilm reactor was developed to remove nitrate and chromate simultaneously. The denitrification and Cr(VI) removal efficiency was evaluated with synthetic groundwater (NO3−-N = 50 mg/L) under different Cr(VI) concentrations (0-1.0 mg/L), carbon nitrogen ratios (C/N) (0.8-1.2), hydraulic retention times (HRT) (2-16 h) and initial pHs (4-10). Nitrate and Cr(VI) were completely removed without nitrite accumulation when the Cr(VI) concentration was lower than 0.4 mg/L. As Cr(VI) up to 1.0 mg/L, the system was obviously inhibited, but it recovered rapidly within 6 days due to the strong adaption and domestication of microorganisms in the biofilm reactor. The results demonstrated that high removal efficiency of nitrate (≥99%) and Cr(VI) (≥95%) were achieved at lower C/N = 0.9, HRT = 8 h, initial pH = 7, and Cr(VI) = 1.0 mg/L. The technology proposed in present study can be alternative for simultaneous removal of co-contaminants in groundwater.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 232, May 2017, Pages 278-284
نویسندگان
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