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Normas DIN – AENOR
DIN EN ISO 9509:2005-08

DIN EN ISO 9509:2005-08

Water quality - Method for assessing the inhibition of nitrification in activated sludge by waters, waste waters and chemicals (ISO/DIS 9509:2005); German version prEN ISO 9509:2005

Qualité de l'eau - Méthode pour l'évaluation de l'effet inhibiteur de boues activées par des produits des eaux, des eaux résiduaires et des chimiques (ISO/DIS 9509:2005); Version allemande prEN ISO 9509:2005

Wasserbeschaffenheit - Verfahren zur Bestimmung der Nitrifikationshemmung in Belebtschlamm durch Wasser, Abwasser und Chemikalien (ISO/DIS 9509:2005); Deutsche Fassung prEN ISO 9509:2005

Fecha Anulación:
2016-10 /Withdrawn
Equivalencias internacionales:

ISO/DIS 9509 (2005-05)

prEN ISO 9509 (2005-05)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 9509:2006-10

Resumen:
This document specifies a method for assessing the short-term inhibitory effect of waters, waste waters or test substances on nitrifying bacteria in activated sludge. The inhibitory effect is estimated over an exposure period of usually 4 h or up to 24 h with weakly nitrifying sludge. The method is applicable with nitrifying activated sludge derived from domestic and synthetic sewage and also to sludges from industrial and mixed domestic and industrial waste waters. The nitrifying activity of the sludge is verified by testing in the presence and absence of a specific inhibitor (e. g. N-allylthiourea). If the nitrification rate is within a suitable range for the test the sludge may be used directly; if adjustments are not necessary.
Keywords:
Activated sludges, Chemicals, Definitions, Determination, Determination of content, Escapement mechanisms, Examination of sludge, Inhibition, Microbiological analysis, Microorganisms, Nitrification, Nitrifying bacteria, Quality, Sewage, Sludge, Substances, Testing, Toxic, Water, Water analysis, Water practice, Water quality, Water testing
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