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ILNAS-EN ISO 5815-1:2019 Edition 09/2019
Water quality - Determination of biochemical oxygen demand after n days (BODn) - Part 1: Dilution and seeding method with allylthiourea addition (ISO 5815-1:2019)
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Abstract

This document specifies the determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification after 5 d or 7 d incubation time. It is applicable to all waters having biochemical oxygen demands usually between 1 mg/l and 6 000 mg/l. It applies particularly to waste waters but also suits for the analysis of natural waters. For biochemical oxygen demands greater than 6 000 mg/l of oxygen, the method is still applicable, but special care is needed taking into consideration the representativeness of subsampling for preparation of the dilution steps. The results obtained are the product of a combination of biochemical and chemical reactions in presence of living matter which behaves only with occasional reproducibility. The results do not have the rigorous and unambiguous character of those resulting from, for example, a single, well‑defined, chemical process. Nevertheless, the results provide an indication from which the quality of waters can be estimated.

Status

Standard - Active

Origin

Technical Committee :
CEN/TC 230 : Water analysis

Implementation

start of the vote on the project    16/11/2017   date of ratification (dor)    26/07/2019
end of the vote on the project    06/02/2018   date of anouncement (doa)    31/12/2019
start of the vote on the final project    02/05/2019   date of publication (dop)    31/03/2020
end of the vote on the final project    25/06/2019   date of withdrawal (dow)    31/03/2020


Publication Official Journal
of the Grand-Duchy of Luxembourg
22/10/2019
Reference Mémorial A N° 709

Relations

Relations to older standards
ILNAS-EN 1899-1:1998
ILNAS-EN 1899-2:1998

Relations to international standards
ISO 5815-1 
ISO 5815-1:2019 

International Classification for Standards (ICS codes) :

13.060.50 : Examination of water for chemical substances

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