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Anaerobic degradation of xenobiotics by organisms from munical solid waste under landfilling conditions
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
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1995 (English)In: Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology, ISSN 0003-6072, E-ISSN 1572-9699, Vol. 69, no 1, 67-74 p.Article in journal (Refereed) Published
Abstract [en]

The potential for biological transformation of 23 xenobiotic compounds by microorganisms in municipal solid waste (MSW) samples from a laboratory scale landfill reactor was studied. In addition the influence of these xenobiotic compounds on methanogenesis was investigated. All R11, 1,1 dichloroethylene, 2,4,6 trichlorophenol, dimethyl phthalate, phenol, benzoate and phthalic acid added were completely transformed during the period of incubation (> 100 days). Parts of the initially added perchloroethylene, trichloroethylene, R12, R114, diethyl phthalate, dibutyl phthalate and benzylbutyl phthalate were transformed. Methanogenesis from acetate was completely inhibited in the presence of 2,5 dichlorophenol, whereas 2,4,6 trichlorophenol and R11 showed an initial inhibition, whenafter methane formation recovered. No transformation or effect on the anaerobic microflora occurred for R13, R22, R114, 3 chlorobenzoate, 2,4,6 trichlorobenzoate, bis(2 ethyl)hexyl phthalate, diisodecyl phthalate and dinonyl phthalate. The results indicate a limited potential for degradation, of the compounds tested, by microorganisms developing in a methanogenic landfill environment as compared with other anaerobic habitats such as sewage digestor sludge and sediments.

Place, publisher, year, edition, pages
1995. Vol. 69, no 1, 67-74 p.
Keyword [en]
biodegradation, chlorinated compounds, freons, methane formation, phthalic acid esters, phenol
National Category
Social Sciences Interdisciplinary
Identifiers
URN: urn:nbn:se:liu:diva-31281DOI: 10.1007/BF00641613Local ID: 17042OAI: oai:DiVA.org:liu-31281DiVA: diva2:252104
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Anaerobic degradation of phenol and related aromatics
Open this publication in new window or tab >>Anaerobic degradation of phenol and related aromatics
2000 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Phenol and other simple aromatic compounds have been found in water leached from landfills, showing that these types of compounds could be either present in disposed waste, or released from it via transformation and degradation processes. Hence, the fate anddegradation potential of such compounds under landfilling conditions is of great concern. Therefore, using micro-organisms from landfills, I have investigated the anaerobic biodegradation of phenol, dimethyl phthalate, 3-chlorobenzoate, 2,4,6-trichlorophenol, tetrabromophthalic acid and aniline. The compounds were chosen to represent substrates of potentially important reactions in the transformation and degradation of aromatic compounds. 24 waste samples from landfills and a time series of samples taken over five years from fourlandfill simulation reactors (in all 20 waste samples) were used as sources of microorganisms. The capacity of these waste samples to degrade the halogenated aromatics was poor or completely absent, indicating that halogenated compounds could be more persistent inlandfills than in other previously investigated anaerobic environments. Phenol and dimethyl phthalate were more readily transformed by most landfill samples, but the degradation capacity was poorer in the landfill simulation experiments. Here the unique sampling series showed an increase in degradation capacity with time, indicating that one to two years is needed to allow a micro-flora capable of degrading aromatic compounds to develop. However, the landfill samples showed higher degradation potentials than the simulation reactor samples, even from the later stages.

A more extensive study designed to elucidate the phenol degradation pathway under anaerobic, fermenting conditions is also presented. Here, phenol was for the first time shown to be degraded to non-aromatic products in a non-methanogenic fermenting culture. The endproductsformed were benzoate, acetate and butyrate. The conversion of phenol to benzoate was proved to be an electron sink reaction, used during processes such as degradation of glucose and is a new example of the diversity of compounds that can used as electronsinks/ acceptors in anaerobic environments. The degradation pathway in the studied cultureproceeds via fom1ation of 4-hydroxybenzoate, 4-hydroxybenzoyl-CoA and benzoyl-CoA, and the activity of a CoA-transferase which activates 4-hydroxybenzoate was measured.

Place, publisher, year, edition, pages
Motala: Kanaltryckeriet, 2000. 61 p.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 212
Keyword
Aromatic compunds, anaerobic degradation, Fysik, Kemi
National Category
Social Sciences Interdisciplinary
Identifiers
urn:nbn:se:liu:diva-32129 (URN)17988 (Local ID)91-7219-728-5 (ISBN)17988 (Archive number)17988 (OAI)
Public defence
2000-05-31, Sal Elysion, Hus-T, Universitetsområdet Valla, Linköping, 10:15 (English)
Opponent
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2014-08-27Bibliographically approved

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Ejlertsson, JörgenKarlsson, AnnaJohansson, ElisabethSvensson, Bo

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Social Sciences Interdisciplinary

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