Abstract
Based on the experimental results of the in situ horizontal well (IHW) repair system, a hydrogeochemical model of the one-dimensional dynamic reaction migration was established to study the denitrification performance of IHW under experimental conditions, which considered the growth and decay of microbial units. PHREEQC software was used to solve and calculate the model, and the material conversion process of nitrate and ethanol in groundwater under microbial denitrification was obtained. The results showed that during the reaction process, the microbial population showed a trend of gradually increasing and then slowly decreasing with the reaction process, and the change curve of microbial population approximately presented a “convex” shape. The growth rate of microorganisms gradually decreased with the consumption of nitrate and ethanol. The maximum hydraulic load of the IHW repair system is 4.88m3/(m2•d) when the nitrate concentration is 25 mg/L, and the maximum hydraulic load is 50 mg/L when the flow rate is 2.44 m3/(m2/d). It provides technical reference for groundwater nitrate in situ remediation project and practical guidance for site application.
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Funding
This work was supported by the Belt and Road Special Foundation of the State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering No.2018nkms06. Data used to produce this paper are available on contact of the first author.
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Liu, P., Wang, G., Shang, M. et al. Groundwater Nitrate Bioremediation Simulation of In Situ Horizontal Well by Microbial Denitrification Using PHREEQC. Water Air Soil Pollut 232, 356 (2021). https://doi.org/10.1007/s11270-021-05313-x
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DOI: https://doi.org/10.1007/s11270-021-05313-x