A long-term performance test on an autotrophic denitrification column for application as a permeable reactive barrier

Chemosphere
Hee Sun MoonJae Young Kim

Abstract

The long-term performance of a sulfur-based reactive barrier system was evaluated using autotrophic denitrification in a large-scale column. A bacterial consortium, containing autotrophic denitrifiers attached on sulfur particles, serving as an electron donor, was able to transform 60 mg N L(-1) of nitrate into dinitrogen. In the absence of phosphate, the consortium was unable to remove nitrate, but after the addition of phosphate, nitrate removal was readily evident. Once the column operation had stabilized, seepage velocities of 1.0 x 10(-3) and 0.5 x 10(-3)cms(-1), corresponding to hydraulic residence times of 24 and 48 h, respectively, did not affect the nitrate removal efficiency, as determined by the nitrate concentration in the effluent. However, data on the nitrate, nitrite and sulfate distribution along the column indicated differential transformation patterns with column depths. Based on the dinitrogen concentration in the total gas collected, the denitrification efficiency of the tested column was estimated to be more than 95%. After 500 d operation, the hydrodynamic characteristics of the column slightly changed, but these changes did not inhibit the nitrate removal efficiency. Data from a bacterial community analys...Continue Reading

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Citations

Nov 28, 2012·Applied Biochemistry and Biotechnology·Naveed Ahmed Qambrani, Sang-Eun Oh
Sep 17, 2013·Journal of Hazardous Materials·Erkan SahinkayaYasemin Toker
Dec 21, 2013·Journal of Environmental Health Science & Engineering·Anoushiravan Mohseni-BandpiMohammad Ali Zazouli
Jun 9, 2016·Journal of Environmental Sciences (China)·Weili ZhouShengbing He
Jan 1, 2011·Journal of Environmental Sciences (China)·Weili ZhouZhenjia Zhang
Jul 7, 2014·Chemosphere·Franklin Obiri-NyarkoGrzegorz Malina
Oct 1, 2014·Bioprocess and Biosystems Engineering·Erkan Sahinkaya, Nesrin Dursun
Oct 17, 2016·Applied Microbiology and Biotechnology·Weili ZhouJung Chen Huang
Jun 2, 2017·Environmental Science and Pollution Research International·Fariba RezvaniHee-Mock Oh
Jun 19, 2019·Applied Microbiology and Biotechnology·Yan-Xiang CuiDi Wu
May 11, 2020·Bioresource Technology·Qiaochong HeSarina J Ergas
Apr 23, 2021·Environmental Technology·Ruinan LiuYanli Zhao
Jun 25, 2021·Frontiers in Microbiology·M F CarboniP N L Lens

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