Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2043
Title: Nitrate Removal from Groundwater by Denitrification in Fixed and Fluidized Bed Biofilm Reactors – A Comparative Study
Authors: Patroescu, Viorel Ion 
Ionescu, Ioana 
Constantin, Lucian Alexandru 
Dinu, Laurentiu Razvan 
Badescu, Valeriu 
Affiliations: National Research and Development Institute for Industrial Ecology, ECOIND 
National Research and Development Institute for Industrial Ecology, ECOIND 
National Research and Development Institute for Industrial Ecology, ECOIND 
National Research and Development Institute for Industrial Ecology, ECOIND 
National Research and Development Institute for Industrial Ecology, ECOIND 
Keywords: Groundwater;Denitrification;Up-Flow Biofilm Reactor;Expanded clay;Fixed Bed;Fluidized Bed;Nitrate Removal Rate
Issue Date: 2019
Abstract: 
The influence of attached biomass bioreactor types on the denitrification process using a low-pitched
groundwater containing nitrates was studied. Two types of fixed-bed and fluidized-bed biofilm reactors,
equipped with expanded clay granular filler, with a particle size fraction of 2-5 mm were used. The nitrite
and nitrate concentrations in the inflow and outflow of the two bioreactors were analytically determined.
Based on the obtained concentration values, the denitrification rates were calculated, ranging between
1275÷1387 g NO 3-N/m3/day in the case of the fixed bioreactor and between 3390÷3867 g NO 3-N/m3/day in
the case of the fluidized bed bioreactor.
Description: 
Revista de Chimie, vol. 70, nr. 1, pag. 297-300, 2019, https://doi.org/10.37358/RC.19.1.6903
URI: http://hdl.handle.net/123456789/2043
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