Home

Subscribe to updates

ISO 5815-1:2003

Water quality -- Determination of biochemical oxygen demand after n days (BODn) -- Part 1: Dilution and seeding method with allylthiourea addition

This standard has been reviewed and then confirmed in 2013 
More information

ISO standards are reviewed every five years

Close

Media and price

Format Price Language
PDF

All our PDF formats are watermarked.
A watermark is additional information that has been
added to a document to identify the rightful licensee.

More information under shopping FAQs

Close
CHF 88,00 Add to basket
Paper CHF 88,00 Add to basket

 

Abstract

ISO 5815-1:2003 specifies a determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification.

ISO 5815-1:2003 is applicable to all waters having biochemical oxygen demands greater than or equal to 3 mg/l of oxygen (the limit of determination) and not exceeding 6 000 mg/l of oxygen. For biochemical oxygen demands greater than 6 000 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 and the results are to be interpreted with circumspection.

The results obtained are the product of a combination of biochemical and chemical reactions. 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.

The test can be influenced by the presence of various substances. Those which are toxic to microorganisms, for example bactericides, toxic metals or free chlorine, will inhibit biochemical oxidation. The presence of algae or nitrifying microorganisms can produce artificially high results.

Annex A describes alternative incubation periods.

Annex B describes multitesting, which can be used to obtain enhanced precision or to demonstrate the presence of substances toxic to microorganisms.

Annex C provides precision data.

 

Preview and follow ISO 5815-1:2003 on our Online Browsing Platform

Preview


Contact customer services

Send your enquiry by email
or call us on +41 22 749 08 88
09:00 – 12:30, 14:00 – 17:00 (UTC+1).

Related standards

Standards in the same category (13.060.50)
Standards from the same committee