Effects of Biochar-filled bioreactor’ s height on Nitrate and ammonium reduction of drainage water

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AHMADVAND M.; SOLTANI J.; VARAVIPOUR M.; HASHEMI GARMDAREH S.E.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:25 | Issue:5 Page(s): 293-304

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Title

Effects of Biochar-filled bioreactor’ s height on Nitrate and ammonium reduction of drainage water

Author(s)

AHMADVAND M. | SOLTANI J. | VARAVIPOUR M. | HASHEMI GARMDAREH S.E. | Issue Writer Certificate

Keywords

AmmoniumQ1

BiocharQ2

DenitrificationQ2

NitrateQ1

Abstract

Background and Objectives: Aqua solutions containing nitrogen as Nitrate are considered to be one of the most important pollutants of surface water and underground water. Denitrification bioreactors provide a carbon sourced environment. Passing drainage water through such bioreactors results in an increase in Denitrification level and Nitrate elimination. In this study, Biochar is used as carbon wall in bioreactors. At first, Nitrate and Ammonium elimination performance of Biochar-filled bioreactors and wheat straw-filled bioreactors were compared. Then, the effect of height of bioreactor on concentration of output Nitrate and Ammonium is taken under study. Also, performance of bioreactors in Nitrate and Ammonium elimination is investigated in a four month time period. Materials and Methods: In order to perform this research, poly-ethylene bioreactors with height of 125 centimeters were used. Height factor is taken under study in four levels; H1=32. 5 cm, H2=62. 5 cm, H3=92. 5 cm and H4=125 cm. Control bioreactors (B0) were filled with 30% wheat straw and sample bioreactors (B1) were filled with 30% Biochar of wheat straw. Results: The results showed that output Nitrate concentration of Denitrification bioreactors significantly depends on Biochar type. Output concentration of Biochar-filled bioreactors (B1) is 18. 16 mg/liter while the output Nitrate concentration of wheat-straw filled bioreactors (B0) is 49. 01 mg/liter. Also, it has been shown that increasing bioreactor’ s height would reduce output Nitrate concentration in both bioreactors. After four month of sampling, output Nitrate concentration from 160 mg/liter was reduced in different treatments; 20. 91 mg/liter in H1B1, 12. 85 in H1B2, 8. 05 mg/liter in H3B1 and 5. 23 in H4B1. However, in control treatments Nitrate concentration was reduced to 42. 17 mg/liter in H1B0, 36. 36 mg/liter in H2B0, 28. 99 mg/liter in H3B0 and 19. 65 mg/liter in H4B0. Time also has a significant effect on Nitrate elimination (P<0. 01). After four month of experiment, average concentration of output Nitrate in sample bioreactors reached the minimum 21. 77 mg/liter, while it was measured 59. 21 mg/liter on the first day of experiment. Concentration of output Ammonium in both Biochar-filled and wheat straw-filled bioreactors was increased comparing to concentration of input Ammonium. It can be explained as some of the Nitrate is dissimulate to Ammonium by anaerobic bacteria. However, this increase was less than 0. 5 mg/liter and negligible. Conclusion: The performance of Nitrate elimination in Biochar-filled bioreactors is more than wheat-straw bioreactors. Also, height increase in bioreactors would result in more Nitrate elimination.

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APA: Copy

AHMADVAND, M., SOLTANI, J., VARAVIPOUR, M., & HASHEMI GARMDAREH, S.E.. (2019). Effects of Biochar-filled bioreactor’ s height on Nitrate and ammonium reduction of drainage water. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(5 ), 293-304. SID. https://sid.ir/paper/156283/en

Vancouver: Copy

AHMADVAND M., SOLTANI J., VARAVIPOUR M., HASHEMI GARMDAREH S.E.. Effects of Biochar-filled bioreactor’ s height on Nitrate and ammonium reduction of drainage water. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;25(5 ):293-304. Available from: https://sid.ir/paper/156283/en

IEEE: Copy

M. AHMADVAND, J. SOLTANI, M. VARAVIPOUR, and S.E. HASHEMI GARMDAREH, “Effects of Biochar-filled bioreactor’ s height on Nitrate and ammonium reduction of drainage water,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 5 , pp. 293–304, 2019, [Online]. Available: https://sid.ir/paper/156283/en

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