Reference number
ISO 9509:2006
International Standard
ISO 9509:2006
Water quality — Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms
Edition 2
2006-07
Preview
ISO 9509:2006
34812
No disponible en español
Publicado (Edición 2, 2006)
Esta publicación se revisó y confirmó por última vez en 2020. Por lo tanto, esta versión es la actual.

ISO 9509:2006

ISO 9509:2006
34812
Idioma
Formato
CHF 63
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Resumen

ISO 9509:2006 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 3 h or up to 24 h with weakly nitrifying sludge.

The method is applicable to 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. If the nitrification rate is within a suitable range for the test, i.e. 2 mg of nitrogen per gram of suspended solid and hour to 6,5 mg of nitrogen per gram of suspended solids and hour, the sludge may be used directly. If not, adjustments are necessary.

The method is applicable to water-soluble, non-volatile chemicals, and to waste waters

Informaciones generales

  •  : Publicado
     : 2006-07
    : Norma Internacional confirmada [90.93]
  •  : 2
     : 12
  • ISO/TC 147/SC 5
    13.060.70 
  • RSS actualizaciones

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