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Impact of temperature on groundwater nitrification in an up-flow biological aerated filter using expanded clay as filter media
Date issued
2016
Author(s)
Patroescu, Viorel Ion
Dinu, Laurentiu Razvan
Constantin, Lucian Alexandru
Alexie, Mihaela
Jinescu, Gherghita
Abstract
The temperature influence upon the nitrification rate was studied using a continuous flow pilot installation,
which comprises a biological aerated filter with ascendant inflow circulation. Used filter media was expanded
clay, 2-5 mm granulometric fraction. The biofilter was fed with raw low - depth groundwater enriched with
NH+ 4. Inorganic nitrogen forms (NH4+, NO2-, NO3-) concentrations were measured both within the inflow and outflow of aerated biological filter, at stationary operation regimes in correspondence with various applied NH+ 4 loading. Values of NH4+removal rates were situated within the 515-1337 g NH4+-N/m3*day domain for temperature increase from 11 to 25.2 C degree. The coefficients of reaction rate vs. reaction temperature equation were also determined.
which comprises a biological aerated filter with ascendant inflow circulation. Used filter media was expanded
clay, 2-5 mm granulometric fraction. The biofilter was fed with raw low - depth groundwater enriched with
NH+ 4. Inorganic nitrogen forms (NH4+, NO2-, NO3-) concentrations were measured both within the inflow and outflow of aerated biological filter, at stationary operation regimes in correspondence with various applied NH+ 4 loading. Values of NH4+removal rates were situated within the 515-1337 g NH4+-N/m3*day domain for temperature increase from 11 to 25.2 C degree. The coefficients of reaction rate vs. reaction temperature equation were also determined.
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Impact of Temperature on Groundwater Nitrification.pdf
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