Methanogenic toxicity of bark tannins and the anaerobic biodegradability of water soluble bark matter

J. A. Field, M. J.H. Leyendekers, R. Sierra Alvarez, G. Lettinga, L. H.A. Habets

Research output: Contribution to journalConference article

89 Scopus citations

Abstract

The 50 percent inhibitory concentration of bark tannins averaged approximately 600 mg COD L-1. The toxicity caused by the resin fraction of bark was demonstrated not to be very important to the methanogenic toxicity of aqueous extracts. While tree resin compounds were found to be very toxic to methanogenic bacteria, the solubility of the resin fraction was very poor due to the low natural pH during the aqueous extraction. Additionally, those compounds aqueous extracted from tree resin at the natural pH were not as toxic as all the tree resin compounds solubilized by alkali and supplied at similar concentrations. Anaerobic biodegradability results indicated that 30 to 50 percent of the bark water soluble COD can be acidified to methanogenic substrates during short term digestion. Additional study results are discussed.

Original languageEnglish (US)
Pages (from-to)219-240
Number of pages22
JournalWater Science and Technology
Volume20
Issue number1
StatePublished - Dec 1 1988
Externally publishedYes
EventForest Industry Wastewaters: Biological Treatment - Tampere, Finl
Duration: Jun 9 1987Jun 12 1987

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ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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