General Information
    • ISSN: 2010-0264 (Print)
    • Abbreviated Title: Int. J. Environ. Sci. Dev.
    • Frequency: Monthly
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
    • Executive Editor: Ms. Nancy Y. Liu
    • Abstracting/ Indexing: Scopus (Since 2019), Chemical Abstracts Services (CAS), EBSCO, CABI, Ulrich Periodicals Directory, Electronic Journals Library, Crossref, ProQuest.
    • E-mail: ijesd@ejournal.net
    • Twitter: @IJESD1
Editor-in-Chief
The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
  • Jun 22, 2018 News! [CFP] 2019 the annual meeting of IJESD Editorial Board, ACESD 2019, will be held in Yokohama National University, Japan during November 9-11, 2019.     [Click]
  • May 10, 2019 News! Vol.10, No.6 has been published with online version!   [Click]
IJESD 2019 Vol.10(6): 178-182 ISSN: 2010-0264
doi: 10.18178/ijesd.2019.10.6.1168
Article

Towards a Miniaturized Device to Evaluate the BOD Parameter of Wastwater

L. Recoules, S. Jouanneau, G. Thouand, A. M. Gue and A. Boukabache
Abstract—The concentration of organic pollutants present in wastewater is classically evaluated by measuring the quantity of dissolved oxygen during five days; it is quantified by the so called BOD5 parameter (Biological Oxygen Demand). This work constitutes the first step of an overall strategy targeting to improve the monitoring of this indicator of the water quality. We focus on the development of a microsystem approach allowing monitoring the O2 consumption induced by the biodegradation process of organic matter. To evaluate the organic pollutants concentration, we use Escherichia coli as bacterial indicator, confined in a PDMS-glass chip. Their metabolic activity in presence of organic molecules is deduced from their oxygen consumption. These measurements are ensured by optical sensors present in each of the five instrumented chambers of the chip. The results show that the microsystem approach is suitable to measure simultaneously different concentrations of organic load, and that it is possible to reduce the analysis time. By examining the O2 diffusion towards the walls of the device, we analyze the different part of the experimental results; it allows, on the basis of a theoretical model, to predict a precise evaluation of the BOD value within few hours.

Index Terms—BOD, wastewater, bacteria, PDMS chip, optods.

L. Recoules is with LETI, Grenoble, France (e-mail: loic.recoules@gmail.com).
S. Jouanneau and G. Thouand are with University of Nantes, France (e-mail: sulivan.jouanneau@univ-nantes.fr, gerald.thouand@univ-nantes.fr).
A. M. Gue and A. Boukabache are with LAAS-CNRS, France (e-mail:gue@laas.fr, aboukaba@laas.fr).

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Cite: L. Recoules, S. Jouanneau, G. Thouand, A. M. Gue and A. Boukabache, "Towards a Miniaturized Device to Evaluate the BOD Parameter of Wastwater," International Journal of Environmental Science and Development vol. 10, no. 6, pp. 178-182, 2019.

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