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Type of publication: research article
Type of publication (PDB): Straipsnis recenzuojamoje užsienio tarptautinės konferencijos medžiagoje / Article in peer-reviewed foreign international conference proceedings (P1d)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Živatkauskienė, Ina;Povilaitis, Arvydas
Title: Stoichiometry of biological nitrogen transformation in denitrificationbioreactors
Is part of: Modern problems of water management, environmental protection, architecture and construction : 7th international scientific and technical conference, Tbilisi, Georgia, August 25-27, 2017: collected papers. Tbilisi, 2017
Extent: p. 205-213
Date: 2017
Keywords: stoichiometry;nitrogen transformation;denitrification bioreactor
Abstract: The mechanisms of biological nitrogen transformations are very important for analysis, design, operation and optimal control of natural ecosystems or engineered systems for nitrogen removal. In general, the nitrogen compounds transformation direction and kinetics depended on bacterial metabolic activity and environmental (aqueous medium) conditions. The stoichiometric equations of ammonification, nitrification and denitrification have demonstrated that the nitrogen cycle in nature is rather complicated. In this study focus on denitrification process, this based on elements mass balance equation. Laboratory scale tests have revealed that during the analyzed period of 235 days in bioreactor with deciduous woodchips the reduction of nitrate-nitrogen mass was reached 51% compared with the total amount observed in the inflow mass. During the same period the reduction of nitrate-nitrogen mass was reached, respectively, in the bioreactor with conifer woodchips - 64%, and with mixed woodchips filler - 63%
Affiliation(s): Kauno kolegija
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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