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Normas DIN – AENOR
DIN EN ISO 5815-1:2018-01

DIN EN ISO 5815-1:2018-01

Water quality - Determination of biochemical oxygen demand after n days (BOD<(Index)n>) - Part 1: Dilution and seeding method with allylthiourea addition (ISO/DIS 5815-1:2017); German and English version prEN ISO 5815-1:2017 / Note: Date of issue 2017-11-24

Qualité de l'eau - Détermination de la demande biochimique en oxygène après n jours (DBO<(Index)n>) - Partie 1: Méthode par dilution et ensemencement avec apport d'allylthiourée (ISO/DIS 5815-1:2017); Version allemande et anglaise prEN ISO 5815-1:2017 / Attention: Date de parution 2017-11-24

Wasserbeschaffenheit - Bestimmung des biochemischen Sauerstoffbedarfs nach n Tagen (BSB<(Index)n>) - Teil 1: Verdünnungs- und Impfverfahren mit Zugabe von Allylthioharnstoff (ISO/DIS 5815-1:2017); Deutsche und Englische Fassung prEN ISO 5815-1:2017 / Achtung: Erscheinungsdatum 2017-11-24

Fecha Anulación:
2020-11 /Withdrawn
Equivalencias internacionales:

ISO/DIS 5815-1 (2017-11)

prEN ISO 5815-1 (2017-11)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 5815-1:2020-11

Resumen:
This part of ISO 5815 specifies the determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification after 5 d incubation time.This part of ISO 5815 is applicable to all waters having biochemical oxygen demands usually between 3 mg/l and 6000 mg/l. It applies particularly to waste waters. For biochemical oxygen demands greater than 6000 mg/l of oxygen, the method is still applicable, but the errors caused by the necessary dilutions can influence the analytical quality of the test method. Then the results are to be interpreted with circumspection.The results obtained are the product of a combination of biochemical and chemical reactions with participation by living matter which behaves only with occasional reproducibility. They do not have the rigorous and unambiguous character of those resulting from, for example, a single, well-defined, chemical process. Nevertheless, they provide an indication from which the quality of waters can be estimated.
Keywords:
Biochemistry, Definitions, Determination, Dilution, Dilution methods, Escapement mechanisms, Mathematical calculations, Methods, Nitrification, Oxygen, Oxygen demand, Quality, Sampling methods, Test results, Testing, Vaccines, Water, Water analysis, Water practice, Water quality, Waters
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