Gaois

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  2. ENVIRONMENT|environmental policy · INDUSTRY|chemistry · SCIENCE|natural and applied sciences

    #557364

    IATE #1427092
    biochemischer Sauerstoffbedarf | biologischer Sauerstoffbedarf | BSB
    de
    Definition die Menge elementaren Sauerstoffs, die beim Abbau der organischen Stoffe von Mikro-organismen verbraucht wird und somit das Mass fuer die Verschmutzung eines Abwassers, gemessen in mg 02/1 oder g 02/m3. Reference QDKS(0877)
    biological oxygen demand | BOD | BOD-5 | biochemical oxygen demand
    en
    Definition amount of oxygen taken up by microorganisms that decompose organic waste matter in water Reference "biochemical oxygen demand" > A Dictionary of Biology > Elizabeth Martin & Robert Hine > Oxford University Press, 2008 > Oxford Reference Online > DGT, http://www.oxfordreference.com/views/ENTRY.html?subview=Main&entry=t6.e485 (18.5.2009)
    Comment It is therefore used as a measure of the amount of certain types of organic pollutant in water. BOD is calculated by keeping a sample of water containing a known amount of oxygen for five days at 20°C. The oxygen content is measured again after this time. A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.See also:- chemical oxygen demand [ IATE:1450129 ]
    DBO | demande biologique d'oxygène | demande biochimique en oxygène | demande biochimique d'oxygène | demande biologique en oxygène
    fr
    Definition quantité d'oxygène nécessaire à la décomposition biologique des matières organiques d'un échantillon, en un temps déterminé(5 jours à 20 degrés C par exemple: DBO5) Reference Vauge,Christian,Lexique des énergies renouvelables,1980,SCM,Neuilly-sur-Seine