Water quality - Method for assessing the inhibition of nitrification of activated sludge micro-organisms by chemicals and waste water (ISO 9509:1989)
NORM herausgegeben am 1.3.1995
Designation standards: ÖNORM EN ISO 9509
Note: UNGÜLTIG
Publication date standards: 1.3.1995
The number of pages: 9
Approximate weight : 27 g (0.06 lbs)
Country: Austrian technische Norm
Kategorie: Technische Normen ÖNORM