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Drinking water denitrification in membrane bioreactor/membrane contactor systems

TitleDrinking water denitrification in membrane bioreactor/membrane contactor systems
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2007
AuthorsFabbricino, M., and Petta Luigi
JournalDesalination
Volume210
Pagination163-174
ISSN00119164
KeywordsBiomass, Bioreactor, Bioreactors, contamination, denitrification, Design, drinking water, experimental study, Fibers, flow pattern, Hollow fibres, Mathematical models, Membrane, Membrane bioreactor, Membrane contractor, Nitrates, Organic carbon, Potable water, Water treatment
Abstract

The results of an experimental study, developed on a membrane bioreactor/membrane contactor pilot plant, aimed at drinking water denitrification are presented and discussed. In the adopted configuration the water, contaminated by nitrates, flows inside the fibres of a membrane unit. Due to the existing concentration gradient, nitrates migrate through the membrane and are reduced to nitrogen gas by the autotrophic biomass attached on the exterior of the fibres, and fed with an external source of organic carbon. Data obtained varying influent flow values and nitrate influent concentrations, confirm the potentiality of the system and show the possibility of full-scale applications. A new mathematical model, useful for both simulation and design of the system is also presented. The model is based on simple mass balances in the flow direction, and through the membrane. Each fibre is considered a plug-flow reactor, and nitrate concentration outside the fibres is assumed to be always zero. To obtain an explicit expression useful for simulation and design of membrane bioreactors/membrane contactors, steady-state conditions are supposed. Experimental data are in good agreement with the model's results, and confirm its applicability. © 2007 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-34248146020&doi=10.1016%2fj.desal.2006.05.041&partnerID=40&md5=5e4021fa4ac91236c155e6da41766a66
DOI10.1016/j.desal.2006.05.041
Citation KeyFabbricino2007163