مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Information Journal Paper

Title

AUTOTROPHIC DENITRIFICATION OF SYNTHETIC NITRATE-CONTAMINATED GROUNDWATER IN UP-FLOW FIXED-BED BIOREACTOR BY PUMICE AS POROUS MEDIA

Pages

  1-7

Abstract

 Background: Increasing NITRATE concentrations in groundwater resources is considered a common environmental and public health problem worldwide. In this research, an autotrophic up-flow bioreactor with PUMICE as media was used to study the effects of the sulfur-to-nitrogen (S/N) ratio and empty bed contact time (EBCT) on NITRATE removal efficiency and byproducts. Methods: Experiments were carried out in a 3. 47 L up-flow, fixed-bed reactor with 3 sampling ports. To evaluate the overall impact of S/N ratio and EBCT on the performance of the bioreactor, several phases with different S/N ratios and EBCTs were applied. Results: At a constant S/N ratio of 3. 85 g/g, as EBCT decreased from 24 hours to 2 hours, the NITRATE removal efficiency decreased from 98% to 64%. On the other hand, at the desired EBCT of 4 hr, as S/N ratio decreased from 3. 85 to 1. 51 g/g, NITRATE removal efficiency was reduced from 85% to 32%. Changing the EBCT and S/N ratio also affected the effluent NITRITE and sulfate concentrations as byproducts. At the S/N ratio of 3. 85 g/g and EBCT of 24 hours, effluent NITRITE and sulfate concentrations were 0. 1 mg NO2--N/L and 463 mg SO4 2-/L, respectively. Decreasing the S/N ratio to 1. 51 g/g and the EBCT to 4 hours caused drastic changes in effluent NITRITE and sulfate concentrations. Conclusion: The results indicated that the AUTOTROPHIC DENITRIFICATION with THIOSULFATE as electron donor and PUMICE as media was feasible and applicable for NITRATE contaminated groundwater.

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    Cite

    APA: Copy

    TOURANG, MASOUD, AMINZADEH, BEHNOUSH, & TORABIAN, ALI. (2018). AUTOTROPHIC DENITRIFICATION OF SYNTHETIC NITRATE-CONTAMINATED GROUNDWATER IN UP-FLOW FIXED-BED BIOREACTOR BY PUMICE AS POROUS MEDIA. ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL, 5(1), 1-7. SID. https://sid.ir/paper/348911/en

    Vancouver: Copy

    TOURANG MASOUD, AMINZADEH BEHNOUSH, TORABIAN ALI. AUTOTROPHIC DENITRIFICATION OF SYNTHETIC NITRATE-CONTAMINATED GROUNDWATER IN UP-FLOW FIXED-BED BIOREACTOR BY PUMICE AS POROUS MEDIA. ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL[Internet]. 2018;5(1):1-7. Available from: https://sid.ir/paper/348911/en

    IEEE: Copy

    MASOUD TOURANG, BEHNOUSH AMINZADEH, and ALI TORABIAN, “AUTOTROPHIC DENITRIFICATION OF SYNTHETIC NITRATE-CONTAMINATED GROUNDWATER IN UP-FLOW FIXED-BED BIOREACTOR BY PUMICE AS POROUS MEDIA,” ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL, vol. 5, no. 1, pp. 1–7, 2018, [Online]. Available: https://sid.ir/paper/348911/en

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