Biodegradation tests

Start of a degradation test

Many choices

The degradability of a compound or a wastewater can in our laboratory de decided with several different standardised and accredited methods.

Our methods

Aerobic degradation is monitored by either a die-away-test or a respirometric test. The degradation is monitored with unspecific analyses such as DOC (dissolved organic carbon) or COD (chemical oxygen demand) in die-away-tests. In respirometric analysis microbial activity and degradation are monitored by the production of carbon dioxide or the consumption of molecular oxygen. Respirometric analysis is typically performed when the contaminant is volatile or when the wastewater foams.

  • Die-away tests: SS-EN ISO 7827:1986/OECD 301A, Zahn-Wellen OECD 302B.
  • Respirometric test: SS-EN 9408:1993/OECD 301F.

Anaerobic degradation is monitored by the production of methane and carbon dioxide. Anaerobic degradation assays are performed when compounds are difficult to degrade aerobically or when they tend to adsorb to sludge.

  • This test is performed according to a standardized procedure (ECETOC no 28/ISO 11734) that is not yet accredited.