Analysis of the methodology to determine anaerobic toxicity: Evaluation of main compounds present in wastewater treatment plants (WWTPs)

J. Urra, PAOLA POIRRIER GONZALEZ, J. Segovia, Y. Lesty, ROLANDO ARTURO CHAMY MAGGI

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The influence of the concentration of biomass on the level of inhibition and anaerobic degradation kinetics in batch systems was studied with toxic compounds that can generate destabilization in the operation of sludge anaerobic digesters. The compounds were grouped in four families; long chain fatty acids, polycyclic aromatic hydrocarbons, linear alkylbenzene sulphonates and organic acids. For the organic acids, there is no effect due to the biomass concentration variation, therefore it is a competitive inhibition; but that doesn't happen with the remaining compounds, where there is a dependence on the complexity of their structure, becoming a non-competitive inhibition. In addition, it was observed that the degradation kinetics is affected, whether diminishing the methane production (polycyclic aromatic hydrocarbons, linear alkylbenzene sulphonates, organics acids) or increasing the initial latency time (long chain fatty acids) without this becoming an obstacle to obtain the maximum methane productions for the latter ones.

Original languageEnglish
Pages (from-to)857-862
Number of pages6
JournalWater Science and Technology
Volume57
Issue number6
DOIs
StatePublished - 26 May 2008

Keywords

  • Biomass
  • Linear alkylbenzene sulphonates (LAS)
  • Long chain fatty acids (LCFA)
  • Methanogenic toxicity
  • Organic acids
  • Polycyclic aromatic hydrocarbon (PAH)

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