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Investigation of the biodegradation process of a sythetic lubricant base stock

: Hund, K.; Grolms, U.; Bünemann, T.F.


Chemosphere 28 (1994), No.4, pp.813-823 : Abb.,Tab.,Lit.
ISSN: 0045-6535
ISSN: 0366-7111
Journal Article
Fraunhofer IUCT ( IME) ()
biodegradation; biologische Abbaubarkeit; DNA; lubricant base stock; microbial biomass; mikrobielle Biomasse; Schmierstoffkomponent

The biodegradation of the synthetic lubricant base stock Priolube 3999 was examined using several methods. The mineralization rate, the degradation determined by IR-spectroscopy (disappearance of CHsub3-CHsub2-groups), the formation of polar metabolites by DOC and the increase of the microbial biomass indicated by the DNA-content were measured. Differences of 33 40 percent were found in the determinations of the degradation by mineralization and IR-spectroscopy. These differences can be explained by the formation of polar metabolites and of microbial biomass. The suitability of several standardized test methods dependent on the substance is discussed.